Anthony R. Kampf

Natural History Museum of Los Angeles County · Mineral Sciences

This is a list of new minerals descriptions for which Anthony R. Kampf is an author.

The new mineral alumolukrahnite (IMA2022-059), CaCu 2+ Al(AsO 4) 2 (OH)(H 2 O), was found at the Jote mine, Copiapó Province, Chile, where it is a secondary alteration phase associated with conichalcite, coronadoite, gypsum, olivenite, pharmacosiderite, rruffite and scorodite. Alumolukrahnite occurs as crude diamond-shaped tablets up to about 0.1 m...

The new mineral chenowethite, Mg(H2O)6[(UO2)2(SO4)2(OH)2]·5H2O, was found in efflorescence crusts on tunnel walls at the Blue Lizard, Green Lizard and Markey uranium mines in Red Canyon, San Juan County, Utah, USA. The crystals are long, thin blades up to about 0.5 mm long, occurring in irregular sprays and subparallel groups. Chenowethite is pale...

Tomiolloite (IMA2021-019) is a new aluminium tellurite sulfite–sulfate mineral discovered at the Bambolla mine, Moctezuma, Sonora, Mexico, well-known tellurium (Te) mineral locality. Tomiolloite forms roughly spherical clusters of crystals comprised of very thin, needle-like crystals (1 μm diameter, ~40 μm length) around a core of small, stubbier,...

The new mineral scenicite (IMA2021-057), [(UO2)(H2O)2(SO4)]2·3H2O, was found in the Green Lizard, Giveaway-Simplot, Markey and Scenic mines, White Canyon district, San Juan County, Utah, USA, where it occurs as a secondary phase on granular quartz matrix in association with various combinations of deliensite, gypsum, natrozippeite, rietveldite and...

Oldsite (IMA2021–075), ideally K2Fe2+[(UO2)(SO4)2]2(H2O)8, is a new uranyl sulfate mineral found on specimens from the North Mesa Mine group, Temple Mountain, San Rafael district, Emery County, Utah, USA. It is a secondary mineral occurring with alum-(K), halotrichite, metavoltine, quartz, römerite, stanleyite, sulfur, szomolnokite, and mathesiusit...

Nitroplumbite (IMA2021-045a), [Pb4(OH)4](NO3)4, is a new mineral discovered at the Burro mine, Slick Rock district, San Miguel County, Colorado, USA. It occurs in a secondary efflorescent assemblage on asphaltite and montroseite- and corvusite-bearing sandstone in association with baryte, chalcomenite, and volborthite. The mineral forms as brown eq...

Pseudodickthomssenite (IMA2021-027), Mg(VO3)2·8H2O, is a new mineral discovered at the Pickett Corral mine, Bull Canyon, Montrose County, Colorado, USA. The mineral formed from the oxidation of montroseite-corvusite assemblages in a moist environment and occurs on asphaltite and on montroseite-corvusite-bearing sandstone in association with dicktho...

Matthiasweilite (IMA2021-069), Pb2+Te4+O3, is a new mineral discovered at the Delamar mine, Lincoln County, Nevada, USA. It is a secondary mineral, associated with adanite, choloalite, northstarite, and other oxysalts in a quartz-rich matrix, that developed in an altered primary ore along with altaite, tetrahedrite-(Zn), native gold, and other sulf...

Lauraniite, Cu6Cd2(SO4)2(OH)12·5H2O, is a new mineral from the Laurani Mine, Aroma Province, La Paz Department, Bolivia, where it is found as a secondary mineral associated with serpierite and brochantite, on a matrix consisting of tennantite and chalcocite. Lauraniite occurs as bladed crystals up to 110 μm in length. Crystals are pale blue and tra...

The new mineral tombstoneite (IMA2021-053), (Ca 0.5 Pb 0.5 )Pb 3 Cu ²⁺ 6 Te ⁶⁺ 2 O 6 (Te ⁴⁺ O 3 ) 6 (Se ⁴⁺ O 3 ) 2 (SO 4 ) 2 ⋅3H 2 O, occurs at the Grand Central mine in the Tombstone district, Cochise County, Arizona, USA, in cavities in quartz matrix in association with jarosite and rodalquilarite. Tombstoneite crystals are green pseudohexagonal...

Tomsquarryite, NaMgAl 3 (PO 4) 2 (OH) 6 q 8H 2 O, is a new secondary phosphate mineral from Tom's phosphate quarry, Kapunda, South Australia. It occurs as colourless, talc-like hexagonal platelets, with diameters of a few tens of micrometres when formed from the decomposition of minyulite and as thicker (∼ 10 µm) hexagonal crystals when formed from...

Håleniusite-(Ce) (IMA2021-042), CeOF, is a new mineral discovered in ejectum from theÁgua de Pau volcano, Sãn Miguel Island, Azores District, Portugal. It occurs as opaque, cream-colored, fine-grained pseudomorphic replacements of hexagonal tablets of bastnäsite-(Ce). It is associated with astrophyllite and fluornatropyrochlore in a matrix composed...

The new mineral nafeasite (IMA2021-103), NaFe 3+ (AsO 3 OH) 2 ·H 2 O, was found at the Torrecillas mine, Iquique Province, Chile, where it is a secondary alteration phase associated https://doi.org/10.1180/mgm.2022.58 Published online by Cambridge University Press with anhydrite, gypsum, halite, lavendulan, magnesiokoritnigite and natrojarosite. Na...

Nitscheite (IMA2020-078), (NH4)2[(UO2)2(SO4)3(H2O)2]·3H2O, is a new mineral species from the Green Lizard mine, Red Canyon, San Juan County, Utah, U.S.A. It is a secondary phase found in association with chinleite-(Y), gypsum, pyrite, and Co-rich rietveldite. Nitscheite occurs in subparallel and divergent intergrowths of yellow prisms, up to about...

Protocaseyite, [Al4(OH)6(H2O)12][V10O28]·8H2O, is a new mineral (IMA 2020-090) occurring in low-temperature, post-mining, secondary mineral assemblages at the Burro mine, Slick Rock district, San Miguel County, Colorado, USA. Crystals of protocaseyite are saffron-yellow, thick blades, with pale orange-yellow streak, vitreous luster, brittle tenacit...

Dendoraite-(NH4), (NH4)2NaAl(C2O4)(PO3OH)2(H2O)2, is a new mineral species from the Rowley mine, Maricopa County, Arizona, U.S.A. It occurs in an unusual bat-guano-related, post-mining assemblage of phases that include a variety of vanadates, phosphates, oxalates and chlorides, some containing NH4+. Other secondary minerals found in association wit...

Relianceite-(K), K4Mg(V4+O)2(C2O4)(PO3OH)4(H2O)10, is a new mineral species from the Rowley mine, Maricopa County, Arizona, U.S.A. It occurs in an unusual bat-guano-related, post-mining assemblage of phases. Other secondary minerals associated with relianceite-(K) are antipinite, dendoraite-(NH4), fluorite, mimetite, mottramite, rowleyite, salammon...

Penriceite, [Mg(H2O)6][(Na(H2O)2Al3(PO4)2F6]·H2O, a new secondary phosphate mineral from the Penrice marble quarry, South Australia, is the fluorine analogue of aldermanite. It occurs as rod-like aggregates of platy crystals, with the platelets up to 100 μm across but only 1-2 μm thick. It is associated with angastonite, minyulite, perhamite, crand...

Elliottite, NaMgAl 3 (PO 4) 2 F 6 ·9H 2 O, a new secondary phosphate mineral, is from Tom's phosphate quarry, Kapunda, South Australia. It occurs as hemispherical aggregates to 1 mm across comprising pseudohexagonal platelets overgrowing minyulite and amorphous angastonite on a matrix of goethite. Closely associated minerals are penriceite and wave...

Michalskiite (IMA2019-162), Cu2+Mg3Fe3+3.33(VO4)6, is a new mineral found on specimens from the dump of the Lichtenberg open pit, Ronneburg uranium mining district, Thuringia, Germany. It is a secondary mineral occurring with arcanite, epsomite, hematite and syngenite on matrix consisting of fine-grained quartz, K-feldspar and mica. It forms striat...

Philipsburgite has been redefined as the ordered intermediate member of the goldhillite-philipsburgite-kipushite isomorphous series with the ideal formula Cu5Zn[(AsO4)(PO4)](OH)6·H2O. The new mineral goldhillite, ideally Cu5Zn(AsO4)2(OH)6·H2O [or Cu5Zn(AsO4)(AsO4)(OH)6·H2O], is the arsenate end-member of this series. Goldhillite occurs on fracture...

Donowensite (IMA2020-067), Ca(H2O)3Fe3+2(V2O7)2, and mikehowardite (IMA2020-068), Fe3+4(VO4)4(H2O)2·H2O, are intimately associated new secondary minerals from the Wilson Springs vanadium mine, Wilson Springs, Arkansas, USA. Donowensite has the following properties: needles up to 1 mm in length; yellow color; orange streak; subadamantine luster; bri...

Kingsgateite, ZrMo 6+ 2 O 7 (OH) 2 ·2H 2 O, is a new supergene mineral from the Old 25 Pipe, Kingsgate, Gough Co., New South Wales, Australia. The mineral occurs in cavities in a quartz, muscovite matrix associated with molybdenite, gelosaite and mambertiite. It forms yellowish green to bluish grey, square tabular crystals to 0.12 mm across. Kingsg...

The new mineral flaggite (IMA2021-044), Pb 4 Cu ²⁺ 4 Te ⁶⁺ 2 (SO 4 ) 2 O 11 (OH) 2 (H 2 O), occurs at the Grand Central mine in the Tombstone district, Cochise County, Arizona, USA, in cavities in quartz matrix in association with alunite, backite, cerussite, jarosite and rodalquilarite. Flaggite crystals are lime-green to yellow-green tablets, up...

A reinvestigation of the type angastonite specimen from the Penrice marble quarry, South Australia, shows that the published powder X-ray diffraction pattern for the mineral corresponds to a mixture of crystalline phases plus an amorphous phase. The published formula for the mineral, CaMgAl2(PO4)2(OH)4⋅7H2O, has been found to correspond to the amor...

Finchite (IMA2017-052), Sr(UO2)2(V2O8)·5H2O, is the first U mineral known to contain essential Sr. The new mineral occurs as yellow-green blades up to ~10 µm in length in surface outcrops of the calcrete-type uranium deposit at Sulfur Springs Draw, Martin County, Texas, USA. Crystals of finchite were subsequently discovered underground in the Pando...

The decavanadate isopolyanion, [V10O28]6–, is a constituent of pascoite-family vanadate minerals and synthetic materials, and both protonated, [HxV10O28](6–x)–, and mixed-valence, [V4+xV5+10–x)O28](6+x)–, varieties have been described. Here we analyze the interaction between the interstitial complex and the decavanadate structural unit using the pr...

Synthetic and naturally occurring forms of tricopper orthotellurate, Cu II 3 Te VI O 6 (the mineral mcalpineite) have been investigated by 3D electron diffraction (3D ED), X-ray powder diffraction (XRPD), Raman and infrared (IR) spectroscopic measurements. As a result of the diffraction analyses, Cu II 3 Te VI O 6 is shown to occur in two polytypes...

Gunterite was originally assigned the ideal formula Na4[H2V10O28]·22H2O. More detailed bond-valence analysis brought into question the presence of a protonated decavanadate anion, which led to the reexamination of the mineral. Infrared spectroscopy confirmed the absence of NH4. Reinterpretation of the original crystal structure data and new electro...

Celleriite, o(Mn22+Al)Al6(Si6O18)(BO3)3(OH)3(OH), is a new mineral of the tourmaline supergroup. It was discovered in the Rosina pegmatite, San Piero in Campo, Elba Island, Italy (holotype specimen), and in the Pikárec pegmatite, western Moravia, Czech Republic (co-type specimen). Celleriite in hand specimen is violet to gray-blue (holotype) and da...

The new mineral paramarkeyite (IMA2020–024), Ca2(UO2)(CO3)3·5H2O, was found in the Markey mine, San Juan County, Utah, USA, where it occurs as a secondary phase on gypsum-coated asphaltum in association with andersonite, calcite, gypsum and natromarkeyite. Paramarkeyite crystals are transparent, pale green-yellow, striated tablets, up to 0.11 mm ac...

Pomite (IMA2021-063), ideally Ca3[V4+5V5+10O37(CO3)]·37H2O, and pseudopomite (IMA2021-064), ideally Ca3.5[V4+6V5+9O37(CO3)]·32H2O, are two new polyoxometalate minerals from the Blue Streak mine, Bull Canyon, Montrose County, Colorado, U.S.A. Pomite properties: striated blades up to ~1 mm long; very dark green-blue color; green-blue streak; vitreous...

Whiteite-(MnMnMn), Mn ²⁺ Mn ²⁺ Mn ²⁺ 2 Al 2 (PO 4 ) 4 (OH) 2 ⋅8H 2 O, is a new whiteite-subgroup member of the jahnsite group from the Foote Lithium Company mine, Kings Mountain district, Cleveland County, North Carolina, USA. It was found in small vugs of partially oxidised pegmatite minerals on the East dump of the mine, in association with eosph...

A new mineral of the beryl group, johnkoivulaite, Cs(Be2B)Mg2Si6O18, was recovered from the gem gravels of the Pein Pyit area of the Mogok region in Myanmar. Thus far, only a single crystal has been identified. It has dimensions about 5.8×5.7×5.5 mm. This specimen has an irregular shape but still has discernible crystal form with geometric growth p...

Secondary tellurium mineralogy has been expanding over the past 20 years thanks to several remarkable deposits mostly in western USA and further studies at Moctezuma, Mexico. These deposits continue to produce new minerals with new crystal-structure types and help us to understand the weathering history of this critical metal. The new mineral tomio...

There is now an astonishing array of synthetic polyoxometalate (POM) compounds thanks to decades of research prompted by their important technological and biochemical uses. Most synthetic POM clusters are based on linkages of polyhedra centered by high-oxidation-state d-block metals (V 5+ , Nb 5+ , Ta 5+ Mo 6+ and W 6+). Many these clusters self-as...

Demagistrisite, ideally BaCa2Mn3+4(Si3O10)(Si2O7)(OH)4·3H2O, is a new mineral found at the Cerchiara mine (eastern Liguria, La Spezia province, Italy). The ore consists of rhythmic interlaying of braunite-bearing metasediments (5–15 cm thick) and hematite-rich cherts. Demagistrisite occurs in association with cerchiaraite-(Mn), namansilite, noelben...

Mineral species that contain the decavanadate isopolyanion [V10O28]6–, including its protonated and mixed-valence variants, constitute the pascoite family of minerals. Within the pascoite family, the isostructural minerals pascoite and magnesiopascoite form the pascoite group and the isostructural minerals lasalite and ammoniolasalite form the lasa...

Wildcatite (IMA2020–019) is a new calcium–iron(III) tellurate discovered at the Wildcat prospect in the Detroit district, Juab County, Utah. Wildcatite may take on a variety of appearances, ranging from transparent orange to brown coatings or masses to earthy, white polycrystalline coatings filling jasperoid fracture surfaces. Coatings of wildcatit...

The wallpaper-type crystal structure of wightmanite, Mg5(BO3)O(OH)5·1–2H2O, has been reanalyzed in order to better understand the position and bonding of hydrogen atoms. Single-crystal structure refinement yielded the monoclinic I2/m unit cell a = 13.5165(18), b = 3.0981(3), c = 18.170(3)Å, ß = 91.441(6)°, and V = 760.65(17)Å3, Z = 4. Hydrogen atom...

Hydroxylpyromorphite, Pb5(PO4)3(OH), has been documented in the literature as a synthetic and naturally occurring phase for some time now but has not previously been formally described as a mineral. It is fully described here for the first time using crystals collected underground in the Copps mine, Gogebic County, Michigan. Hydroxylpyromorphite oc...

Thebaite-(NH4), (NH4,K)3Al(C2O4)(PO3OH)2(H2O), is a new mineral species (IMA2020-072) from the Rowley mine, Maricopa County, Arizona, USA. It occurs in an unusual bat-guano-related, post-mining assemblage of phases that include a variety of vanadates, phosphates, oxalates and chlorides, some containing NH4⁺. Other secondary minerals found in associ...

The new mineral uranoclite (IMA2020-074), (UO2)2(OH)2Cl2(H2O)4, was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as tightly intergrown aggregates of irregular yellow crystals in a secondary assemblage with gypsum. The streak is very pale yellow and the fluorescence is bright green-white under 405 nm ultraviolet light....

The new minerals allantoin (IMA2020-004a), C 4 H 6 N 4 O 3 , and natrosulfatourea (IMA2019-134), Na 2 (SO 4)[CO(NH 2) 2 ], were found in the Rowley mine, Maricopa County, Arizona, USA, where they occur together in bat guano in association with aphthitalite and urea. Allantoin properties: colorless, transparent, untwinned blades to 0.3 mm; white str...

Galeaclolusite, [Al 6 (AsO 4) 3 (OH) 9 (H 2 O) 4 ]•8H 2 O, is a new secondary hydrated aluminium arsenate mineral from Cap Garonne, Var, France. It forms crusts and spheroids of white fibres up to 50 μm long by 0.4 μm wide and only 0.1 μm thick. The fibres are elongated along [001] and flattened on (100). The calculated density is 2.27 g•cm-3. Opti...

Native tungsten (IMA2011-004), W, is officially described as a new mineral from gold placers in the Bol'shaya Pol'ya river valley, Prepolar Urals, Russia, associated with yttriaite-(Y) and from quartz veins in the Mt Neroyka rock-crystal field, Ust–Puiva, Tyumenskaya Oblast', Russia. Tungsten forms polycrystalline grains and masses, and rarely cubo...

L’articolo costituisce un aggiornamento della mineralogia della miniera abbandonata di Cassagna alla luce dei ritrovamenti effettuati nel periodo 2015-2020 grazie all’assiduità e alla grande pazienza di FC e alle caratterizzazioni (SEM-EDS, WDS, PXRD, SCXRD e microRaman) effettuate da ARK e altri mineralogisti. Dopo brevi note sulla storia estratti...

The article, similar to what has already been published for the Cassagna Section, constitutes an update of the mineralogy of the abandoned Gambatesa Mine in the light of the findings made in the period 2015-2020, thanks to the on-field research by FC and to the characterizations (SEM-EDS, WDS, PXRD, SCXRD) carried-out by ARK. After brief notes on t...

Jasonsmithite (IMA2019–121), Mn2+4ZnAl(PO4)4(OH)(H2O)7·3.5H2O, is a pegmatite-phosphate mineral from the Foote Lithium Company mine, Kings Mountain district, Cleveland County, North Carolina, USA. It is is interpreted as having formed by late–stage, low–temperature hydrothermal alteration. Crystals are colorless to light brown, slightly flattened p...

Native tungsten (IMA2011-004), W, is officially described as a new mineral from gold placers in the Bol'shaya Pol'ya river valley, Prepolar Urals, Russia, associated with yttriaite-(Y) and from quartz veins in the Mt Neroyka rock-crystal field, Ust–Puiva, Tyumenskaya Oblast', Russia. Tungsten forms polycrystalline grains and masses, and rarely cubo...

Seaborgite (IMA2019-087), LiNa6K2(UO2)(SO4)5(SO3OH)(H2O), is a new mineral species from the Blue Lizard mine, Red Canyon, San Juan County, Utah, U.S.A. It is a secondary phase found on gypsum in association with copiapite, ferrinatrite, ivsite, metavoltine, and römerite. Seaborgite occurs in sprays of light-yellow, long flattened prisms or blades,...

Jeankempite, Ca 5 (AsO 4) 2 (AsO 3 OH) 2 (H 2 O) 7 , is a new mineral species (IMA 2018-090) discovered amongst coatings of arsenate minerals on oxidized copper arsenides from the Mohawk No. 2 mine, Mohawk, Keweenaw County, Michigan, USA. The new mineral occurs as lamellar bundles of colourless to white plates up to 1 mm in width and is visually in...

The previously unknown crystal structure of pingguite was determined and refined from laboratory X-ray powder diffraction data using a synthetic sample. Additional single crystal diffraction of natural pingguite confirms that the crystal structure of the synthetic sample is identical to the natural mineral. This new crystal structure calls for a re...

Monteneroite (IMA2020–028), Cu2+Mn2+2(AsO4)2·8H2O, is a new vivianite–structure mineral from the Monte Nero mine, Rocchetta di Vara, La Spezia, Liguria, Italy. It is a secondary mineral that crystallized from As–, Cu– and Mn–rich fluids and it is associated with braunite, copper, cuprite, rhodochrosite and strashimirite. Monteneroite occurs as ligh...

The new mineral isselite, Cu 6 (SO 4 )(OH) 10 (H 2 O) 4 ⋅H 2 O, has been discovered in the Lagoscuro mine, Monte Ramazzo mining complex, Genoa, Eastern Liguria, Italy. It occurs as sprays of blue acicular crystals, up to 0.1 mm long, associated with brochantite and posnjakite. Streak is light blue and the lustre is vitreous. Isselite is brittle, wi...

The new minerals natromarkeyite, Na 2 Ca 8 (UO 2) 4 (CO 3) 13 (H 2 O) 24 ⋅3H 2 O (IMA2018-152) and pseudomarkeyite, Ca 8 (UO 2) 4 (CO 3) 12 (H 2 O) 18 ⋅3H 2 O (IMA2018-114) were found in the Markey mine, San Juan County, Utah, USA, where they occur as secondary phases on asphaltum. Natromarkeyite properties are: untwinned blades and tablets to 0.2...

Fulbrightite (IMA2019-032), Ca(VO) 2 (AsO 4) 2 Á4H 2 O, is a new mineral from the Packrat mine, near Gateway, Mesa County, Colorado, USA, and from the Rovnost mine, Jáchymov, Czech Republic. It is a low-temperature secondary phase. The mineral most typically occurs in shades of light green and forms rosettes of roughly square (pseudotetragonal) pla...

IMA no. 2020-028 Monteneroite Cu2+Mn2+2(AsO4)2·8H2O Monte Nero mine, Rocchetta di Vara, La Spezia, Liguria, Italy (44°14'48"N, 9°45'27" E) Anthony R. Kampf*, Jakub Plášil, Barbara P. Nash, Marco E. Ciriotti, Fabrizio Castellaro, and Luigi Chiappino *E-mail: akampf@nhm.org Structurally related to vivianite Monoclinic: C2/m; structure determined a =...

Hagstromite, Pb 8 Cu ²⁺ (Te ⁶⁺ O 6 ) 2 (CO 3 )Cl 4 , (IMA2019-093) is a new tellurate mineral from Otto Mountain near Baker, California, USA. It occurs on quartz in association with cerussite, fuettererite and thorneite. It is a secondary oxidation zone mineral and is presumed to have formed by oxidation of earlier formed tellurides, chalcopyrite a...

Jahnsite-(CaMnZn), CaMn ²⁺ Zn 2 Fe ³⁺ 2 (PO 4 ) 4 (OH) 2 ⋅8H 2 O, is a new jahnsite-group mineral associated with alteration of phosphophyllite at the Hagendorf-Süd pegmatite, Bavaria. It forms as thin yellow crusts and brown epitactic growths on altered phosphophyllite, both of which comprise lath-like crystals in orthogonal orientation, up to 100...

The new minerals natromarkeyite (IMA2018-152), Na 2 Ca 8 (UO 2) 4 (CO 3) 13 (H 2 O) 24 ·3H 2 O, and pseudomarkeyite (IMA2018-114), Ca 8 (UO 2) 4 (CO 3) 12 (H 2 O) 18 ·3H 2 O, were found in the Markey mine, San Juan County, Utah, USA, where they occur as secondary phases on asphaltum. Natromarkeyite properties: untwinned blades and tablets to 0.2 mm...

Müllerite (IMA2019-060) is a new mineral found at several workings on Otto Mountain, 2.5 km NW of Baker, San Bernardino County, California, USA. Müllerite occurs as hexagonal tablets and thin plates up to 0.2 mm across, intergrown ball-like clusters, and scattered flakes. Crystals are yellow, tending to reddish-orange, and have a pale-yellow streak...

Northstarite, Pb 6 (Te 4þ O 3) 5 (S 2 O 3), is a new mineral from the North Star mine, Tintic district, Juab County, Utah, USA. It is an oxidation-zone mineral occuring in a vug in massive quartz-baryte-enargite-pyrite in association with anglesite, azurite, chrysocolla, fluorapatite, plumbogummite, tellurite, zincospiroffite, and the new mineral a...

Niasite (IMA2019-105) and johanngeorgenstadtite (IMA2019-122) are Ni4.52+(AsO4)3 dimorphs from Johanngeorgenstadt, Saxony, Germany. The two new minerals occur in association with one another and with aerugite, bunsenite, quartz, rooseveltite and xanthiosite. This mineral assemblage is apparently secondary in origin and most likely formed from the b...

The new mineral pseudomeisserite-(NH4) (IMA2018-166), (NH4,K)2Na4[(UO2)2(SO4)5]·4H2O, was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as light yellow prisms in a secondary assemblage with belakovskiite, blödite, changoite, ferrinatrite, gypsum, ivsite, metavoltine, tamarugite. The streak is very pale yellow and the fl...

The general structural formula for the walentaite group is [((A1yA1’1-y), A2)(H2O)n][Bx(As2)2-x(As3)M1(M2)2(TO4)2(O,OH)7], based on heteropolyhedral layers of configuration [M1(M2)2(TO4)2(O,OH)6], with surface attached species at the B, As2 and As3 sites, and with interlayer hydrated cation groups centred at the A sites. The group is divided into w...

Cuyaite (IMA2019-126), Ca 2 Mn ³⁺ As ³⁺ 14 O 24 Cl, is a new arsenite mineral from near Cuya in the Camarones Valley, Arica Province, Chile. It is associated with anhydrite, native arsenic, arsenolite, calcite, claudetite, ferrinatrite, gajardoite-3 R , leiteite, magnesiocopiapite, phosphosiderite, pyrite, realgar and talmessite and formed from the...

Adanite, Pb2(Te4+O3)(SO4), is a new oxidation-zone mineral from the North Star mine, Tintic district, Juab County, Utah, and from Tombstone, Cochise County, Arizona, USA. The characterization of the species is based principally on North-Star holotype material. Crystals are beige wedge-shaped blades, up to about 1 mm in length, in cockscomb intergro...

The new mineral mauriziodiniite (IMA2019-036), NH 4 (As 2 O 3 ) 2 I, was found at the Torrecillas mine, Iquique Province, Chile, where it is a secondary alteration phase associated with calcite, cuatrocapaite-(NH 4 ), lavendulan, magnesiokoritnigite and torrecillasite on matrix consisting of native arsenic, arsenolite and pyrite. Mauriziodiniite oc...

Kroupaite (IMA2017-031), ideally KPb0.5[(UO2)8O4(OH)10]·10H2O, is a new uranyl-oxide hydroxyl-hydrate mineral found underground in the Svornost mine, Jáchymov, Czechia. Electron-probe microanalysis (WDS) provided the empirical formula (K1.28Na0.07)Σ1.35(Pb0.23Cu0.14Ca0.05Bi0.03Co0.02Al0.01)Σ0.48[(UO2)7.90(SO4)0.04O4.04(OH)10.00]·10H2O, basis of 40...

Smamite, Ca2Sb(OH)4[H(AsO4)2]·6H2O, is a new mineral species from the Giftgrube mine, Rauenthal, Sainte-Marie-Aux-Mines ore-district, Haut-Rhin department, France. It is a supergene mineral found in quartz-carbonate gangue with disseminated to massive tennantite-tetrahedrite series minerals, native arsenic, Ni-Co arsenides and supergene minerals pi...

Uroxite (IMA2018-100), [(UO2)2(C2O4)(OH)2(H2O)2]·H2O, and metauroxite (2019-030), (UO2)2(C2O4)(OH)2(H2O)2, are the first two uranyl-oxalate minerals. Uroxite was found in the Markey mine, Red Canyon, Utah, USA and in the Burro mine, Slick Rock district, Colorado, USA. Metauroxite was found only in the Burro mine. Both minerals are post-mining, seco...