Barbara P Nash

Barbara P Nash
University of Utah | UOU · Department of Geology and Geophysics

Ph.D.

About

229
Publications
31,164
Reads
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4,953
Citations
Citations since 2017
68 Research Items
1807 Citations
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
Introduction
Professor Emeritus of Geology & Geophysics; Director, Electron Microprobe Laboratory
Additional affiliations
January 2009 - June 2009
Leibniz Universität Hannover
Position
  • Mercator Professor
July 1970 - present
University of Utah
July 1970 - present
University of Utah
Position
  • Professor Emeritus
Education
September 1965 - June 1971
September 1964 - June 1965
September 1961 - June 1964
Rice University
Field of study
  • Geology

Publications

Publications (229)
Article
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...
Article
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...
Article
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...
Article
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...
Article
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...
Article
Full-text available
We present a novel approach to developing a unified radiocarbon-based chronology for multiple sediment cores from a location where radiocarbon dating is challenging. We used 36 radiocarbon ages from eight terminal Pleistocene and Holocene sediment cores with correlated stratigraphies. Stratigraphic correlation was accomplished using a combination o...
Article
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...
Article
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...
Article
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...
Article
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....
Article
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...
Article
Obsidian is abundant in the Main Ethiopian Rift (MER). Petrological and geochemical features of obsidian from four volcanic centers in the MER, namely Birenti, Dofen, Fentale and Kone, are presented. Compositional and petrological variability is noted among the Dofen and Fentale obsidian, but not in those from Kone and Birenti where each have separ...
Article
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...
Conference Paper
The beneficial corrosion of reactive volcanic glass in the pumiceous pozzolanof ancient Roman marine concretes produces cementitious systems that have maintained cohesion and resilience for two millennia. Long after hydrated lime (Ca(OH)2 was fully consumed through pozzolanic reaction, fluids percolating through the concrete structures dissolved re...
Article
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...
Article
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...
Article
Full-text available
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 =...
Article
Ethiopia is rich in obsidian and prehistoric peoples were utilizing it to make artifacts since at least the Early Stone Age. The unique chemical compositions of obsidian are of considerable interest to archaeologists when obsidian artifacts are recovered at prehistoric sites, both in terms of determining provenance and cultural exchange. Here we pr...
Article
Full-text available
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...
Article
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...
Article
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...
Article
A novel flash ironmaking technology (FIT) that greatly reduces energy consumption and greenhouse gas emissions compared with blast furnace (BF) ironmaking has been developed at the University of Utah. In this technology, a falling stream of iron ore concentrate is directly converted to metallic iron by reducing gases such as hydrogen, natural gas o...
Article
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...
Article
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...
Article
The interaction of a magnesia-carbon refractory with iron under flash ironmaking conditions has been investigated in this work. Oxidation of carbon from the magnesia-carbon refractory took place and the formation of magnesiowustite (MgxFe1-xO) solid solution occurred as a result of the interaction between magnesia (MgO) in the refractory with iron...
Article
Lumsdenite (IMA 2018–092), ideally NaCa3Mg2(As3+V4+2V5+10As5+6O51)·45H2O, is a rare new polyoxometalate mineral from the Packrat mine, Gateway district, Mesa County, Colorado, USA. Crystals of lumsdenite occur as blades up to 0.2 mm in length, commonly growing in sprays. The crystals are dark green blue, with a green-blue streak. The mineral occurs...
Article
Okieite, Mg3[V10O28]·28H2O, is a new decavanadate mineral from the Burro mine, Slick Rock district, San Miguel County, Colorado, USA (type locality); the mineral is also found at the Hummer mine, Paradox Valley, Montrose County, also in Colorado. The mineral is rare; it occurs with dickthomssenite on montroseite- and corvusite-bearing sandstone. Cr...
Article
Caseyite , a new mineral containing a variant of the flat-Al 13 polyoxometalate 3 cation 4 5 ABSTRACT 18 Caseyite, [(V 5+ O 2)Al 10-x (OH) 20-2x (H 2 O) 18-2x ] 2 [H 2 V 4+ V 5+ 9 O 28 ][V 5+ 10 O 28 ] 2 [(Na,K,Ca) 2-y (SO 4) 2-z 19 ·(60+8x+y+4z)H 2 O], where x = 0-2.5, y = 0-2, z = 0-2, is a new mineral (IMA 2019-002) 20 occurring in low-temperatu...
Article
The new mineral lussierite (IMA2018-101), Na10[(UO2)(SO4)4](SO4)2(H2O)3, was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as pale green- yellow prisms or blades in a secondary assemblage with belakovskiite, ferrinatrite, halite, ivsite, metavoltine and thenardite. The streak is white and the fluorescence is bright cyan...
Article
Davidbrownite-(NH₄), (NH₄,K)₅ (V⁴⁺O)₂(C₂O₄)[PO_(2.75)(OH)_(1.25)]₄·3H₂O, is a new mineral species 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 fou...
Article
Bicapite, KNa2Mg2(H2PV145+O42)·25H2O, is a new mineral species (IMA2018-048) discovered at the Pickett Corral mine, Montrose County, Colorado, U.S.A. Bicapite occurs as square tablets up to about 0.2 mm on edge on montroseite-corvusite-bearing sandstone. Crystals are dark red-brown, often appearing black. The streak is orange, and the luster is vit...
Article
The new minerals camanchacaite, NaCaMg2[AsO4]2[AsO2(OH)2], chinchorroite, Na2Mg5(As2O7)2(AsO3OH)2(H2O)10, espadaite, Na4Ca3Mg2[AsO3OH]3[AsO2(OH)2]9·7H2O, magnesiofluckite, CaMg(AsO3OH)2(H2O)2, picaite, NaCa[AsO3OH][AsO2(OH)2], and ríosecoite, Ca2Mg(AsO3OH)3(H2O)2, were discovered on two closely related specimens collected from the Torrecillas mine,...
Article
Studies of early human settlement in alpine environments provide insights into human physiological, genetic, and cultural adaptation potentials. Although Late and even Middle Pleistocene human presence has been recently documented on the Tibetan Plateau, little is known regarding the nature and context of early persistent human settlement in high e...
Article
Full-text available
Phoxite, (NH 4) 2 Mg 2 (C 2 O 4)(PO 3 OH) 2 (H 2 O) 4 , is a new mineral species from the Rowley mine, Mari-copa County, Arizona, U.S.A., and it has potential uses in agricultural applications for soil conditioning , fertilizing, and as a natural pesticide. It was found in an unusual bat-guano-related, post-mining assemblage of phases that include...
Article
Magnesioleydetite and straßmannite, two new uranyl sulfates minerals with sheet structures from Red Canyon, Utah - Anthony R. Kampf, Jakub Plášil, Anatoly V. Kasatkin, Barbara P. Nash, Joe Marty
Article
Full-text available
Davidbrownite-(NH 4), (NH 4 ,K) 5 (V 4+ O) 2 (C 2 O 4)[PO 2.75 (OH) 1.25 ] 4 ·3H 2 O, is a new mineral species 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 NH 4 +. Other seconda...
Article
Meyrowitzite, Ca(UO 2)(CO 3) 2 ·5H 2 O, is a new mineral species from the Markey mine, Red Canyon, San Juan County, Utah, U.S.A. It is a secondary phase found on calcite-veined asphaltum in association with gypsum, markeyite, and rozenite. Meyrowitzite occurs as blades up to about 0.2 mm in length, elongate on [010], flattened on {100}, and exhibit...
Article
Pandoraite-Ba, BaV 4þ 5 V 5þ 2 O 16 Á3H 2 O, and pandoraite-Ca, CaV 4þ 5 V 5þ 2 O 16 Á3H 2 O, are two new vanadium-oxide-bronze minerals from the Pandora mine, La Sal district, San Juan County, Colorado, USA. Pandoraite-Ba and pandoraite-Ca are rare secondary minerals and occur on a matrix consisting of recrystallized quartz grains from the origina...
Article
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The new mineral ammoniomathesiusite (IMA 2017-077), (NH4)5(UO2)4(SO4)4(VO5)·4H2O, was found in the Burro mine, San Miguel County, Utah, USA, where it occurs as a secondary phase on asphaltum/quartz matrix in association with ammoniozippeite (2017-073), gypsum, jarosite and natrozippeite. The mineral forms pale yellow to greenish-yellow prisms, up t...
Preprint
Meyrowitzite, Ca(UO2)(CO3)2·5H2O, is a new mineral species from the Markey mine, Red Canyon, San Juan County, Utah, U.S.A. It is a secondary phase found on calcite-veined asphaltum in association with gypsum, markeyite, and rozenite. Meyrowitzite occurs as blades up to about 0.2 mm in length, elongate on [010], flattened on {100}, and exhibiting th...
Article
Full-text available
Redcanyonite (IMA2016-082), (NH4)2Mn[(UO2)4O4(SO4)2](H2O)4, occurs underground in the Blue Lizard mine, Red Canyon, White Canyon district, San Juan County, Utah, USA. It occurs with natrozippeite, brochantite, devilline, posnjakite, johannite, gypsum, bobcookite, pickeringite, pentahydrite and the NH4-analogue of zippeite: ammoniozippeite. Redcanyo...
Article
Meitnerite (IMA2017-065), (NH4)(UO2)(SO4)(OH)·2H2O, is a new mineral from the Green Lizard mine in Red Canyon, San Juan County, Utah, USA, where it occurs as a secondary alteration phase. It occurs on partially recrystallized quartz grains in association with beshtauite and gypsum. Meitnerite occurs as intergrowths of tabular crystals, flattened on...
Article
Full-text available
Ammoniolasalite, [(NH4)2Mg2(H2O)20] [V10O28], is a new decavanadate species (IMA2017-094) from the Burro mine, Slick Rock district, San Miguel County, Colorado, USA (38°2'42''N 108°53'23''W). The mineral occurs as crusts on montroseite- and corvusite-bearing sandstone in an NH4-rich secondary assemblage also containing ammoniozippeite and the NH4-b...
Article
Full-text available
Jahnsite-(NaMnMg), (Na,Ca)(Mn2+,Fe3+)(Mg,Fe3+,Mn3+)2Fe3+2(PO4)4(OH)2(H2O)8, is a new mineral from the Sapucaia pegmatite, Conselheiro Pena pegmatite district, Minas Gerais, Brazil, and the White Rock No. 2 quarry, Bimbowrie Conservation Park, South Australia, Australia. At both localities, it is a low temperature, secondary mineral formed as the re...
Article
Full-text available
The new mineral barwoodite (IMA2017-046), Mn2þ6(Nb5þ,A)2(SiO4)2(O,OH)6, was found in miarolitic cavities at the Big Rock quarry (also known as the 3M quarry), Granite Mountain, Little Rock, Pulaski County, Arkansas, USA. It is interpreted as crystallizing from pegmatitic fluids. The mineral occurs as brownish-red hexagonal plates up to 3 mm in diam...
Article
Full-text available
The new mineral ammoniozippeite (IMA2017-017), (NH4)2[(UO2)2(SO4)O2]·H2O, was found in both the Blue Lizard mine San Juan County, Utah, and the Burro mine, San Miguel County, Colorado, USA. At both mines, it occurs as a low-temperature, secondary phase. The mineral is yellow to yellowish orange with pale yellow streak and fluoresces dull green yell...
Article
The new mineral greenlizardite (IMA2017-001), (NH 4 )Na(UO 2 ) 2 (SO 4 ) 2 (OH) 2 ·4H 2 O, was found in the Green Lizard mine, Red Canyon, San Juan County, Utah, USA, where it occurs as a secondary alteration phase. It is associated with ammoniozippeite, boussingaultite and dickite. It forms as light green-yellow blades up to ~0.3 mm long. The mine...
Article
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The new mineral magnesiocanutite (IMA2016-057), NaMnMg 2 [AsO 4 ] 2 [AsO 2 (OH) 2 ], was found at the Torrecillas mine, Iquique Province, Chile, where it occurs as a secondary phase in association with anhydrite, canutite, halite, lavendulan and magnesiokoritnigite. Magnesiocanutite occurs as pale brownish-pink to rose-pink, lozenge-shaped tablets...
Article
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Alpeite (IMA2016-072), Ca4Mn3+2Al2(Mn3+Mg)(SiO4)2(Si3O10)(V5+O4)(OH)6, is a new member of the ardennite group from the Monte Alpe mine, Liguria, Italy. It crystallized from V- and Mn-rich hydrothermal fluids in an oxidizing environment. Alpeite occurs as intergrowths of plates, flattened on {1 0 0} and exhibiting the forms {100},{001},{012} and {10...
Article
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The new mineral currierite (IMA2016-030), Na4Ca3MgAl4 (AsO3OH)12· 9H2O, was found at the Torrecillas mine, Iquique Province, Chile, where it occurs as a secondary alteration phase in association with anhydrite, canutite, chudobaite, halite, lavendulan, magnesiokoritnigite, quartz, scorodite and torrecillasite. Currierite occurs as hexagonal prisms,...
Article
A comparative study is presented of the chemistry and crystallography of zinc-bearing strunzites from Hagendorf Süd, Bavaria, Germany and the Sitio do Castelo mine, Folgosinho, Portugal. Electron microprobe analyses of samples from the two localities show quite different cation substitutions. The Hagendorf Süd mineral is a Zn-bearing ferristrunzite...
Article
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The new mineral chinleite-(Y) (IMA2016-017), NaY(SO 4) 2 ·H 2 O, was found in the Blue Lizard mine, San Juan County, Utah, USA, where it occurs as a secondary alteration phase. Chinleite-(Y) crystals are thin hexagonal {100} prisms (up to 0.3 mm long) with pyramidal terminations consisting of the forms {101} and {011}. Prisms are typically intergro...
Article
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Rietveldite (IMA2016–081), Fe(UO2)(SO4)2·5H2O, is a new uranyl sulfate mineral described from three localities: Giveaway-Simplot mine (Utah, USA), Willi Agatz mine (Saxony, Germany) and Jáchymov (Western Bohemia, Czech Republic). The mineral rarely occurs in blades up to 0.5 mm long, in association with other post-mining supergene uranyl sulfates a...
Article
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The new mineral juansilvaite (IMA2015-080), Na 5 Al 3 [AsO 3 (OH)] 4 [AsO 2 (OH) 2 ] 2 (SO 4) 2 ·4H 2 O, was found at the Torrecillas mine, Iquique Province, Chile, where it occurs as a secondary alteration phase in association with anhydrite, canutite, halite, sulfur and a mahnertite-like phase. Juansilvaite occurs as bright pink blades up to ∼0.5...
Article
Rowleyite, [Na(NH 4 ,K) 9 Cl 4 ][V 2 5+,4+ (P,As)O 8 ] 6 ·n[H 2 O,Na,NH 4 ,K,Cl], is a new mineral species from the Rowley mine, Maricopa County, Arizona, U.S.A. It was found in an unusual low-temperature, apparently post-mining suite of phases that include various vanadates, phosphates, oxalates, and chlorides, some containing NH 4 +. Other second...
Article
Full-text available
Burroite, Ca2(NH4)2(V10O28) 15H2O, is a new mineral species (IMA2016-079) discovered in the Burro mine, Slick Rock district, San Miguel County, Colorado, U.S.A. (38°2'42''N 108°53'23''W). The mineral is found as orange-yellow, somewhat flattened prisms up to 2 mm in length occurring on a montroseite-and corvusite-bearing sandstone. Burroite has yel...
Article
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Mesaite (IMA2015-069), ideally CaMn 2þ 5 (V 2 O 7) 3 ·12H 2 O, is a new mineral from the Packrat mine, Gateway district, Mesa County, Colorado, USA. Crystals of mesaite occur as orangish red blades up to 0.1 mm long and ∼10 μm thick. The streak is light pinkish orange and the lustre is vitreous, transparent. Mesaite has a brittle tenacity, {010} pe...
Article
Fluorwavellite (IMA2015-077), Al3(PO4)2(OH)2F·5H2O, the F analog of wavellite, is a new mineral from the Silver Coin mine, Valmy, Iron Point district, Humboldt County, Nevada, and the Wood mine, 5 miles NE of Del Rio, Cocke County, Tennessee; at both occurrences it is a low-temperature secondary mineral. Fluorwavellite is essentially identical to w...
Article
Full-text available
Zincostrunzite (IMA2016-023), ZnFe 3þ 2 (PO 4) 2 (OH) 2 ·6.5H 2 O, is a new secondary phosphate mineral from the Sitio do Castelo tungsten mine in Portugal and the Hagendorf-Süd pegmatite in Germany. At Sitio do Castelo, zincostrunzite was derived from the alteration of triplite–zwieselite. At Hagendorf-Süd, it was found in a nodule of former triph...
Article
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Hydropascoite, Ca3(V10O28)•24H2O, is a new mineral species (IMA2016-032) discovered in the Packrat mine, near Gateway, Mesa County, Colorado. It occurs as blades up to 2 mm in length on asphaltum associated with montroseite- and corvusite-bearing sandstone. Hydropascoite is dark yellow-green, with a pistachio green streak, vitreous luster, Mohs har...
Article
Kegginite, Pb 3 Ca 3 [AsV 12 O 40 (VO)]·20H 2 O, is a new mineral species from the Packrat mine, near Gateway, Mesa County, Colorado, U.S.A. It is a secondary mineral found on asphaltum in a montroseite-and corvusite-bearing sandstone. Other secondary minerals found in close association with kegginite are ansermetite, gypsum, mesaite, and sherwoodi...
Article
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The new mineral chongite (IMA2015–039), Ca 3 Mg 2 (AsO 4) 2 (AsO 3 OH) 2 ·4H 2 O, was found at the Torrecillas mine, Iquique Province, Chile, where it occurs as a secondary alteration phase in association with native arsenic, arsenolite, gajardoite, talmessite and torrecillasite. Chongite occurs as prismatic crystals up to ∼1 mm long grouped in tig...
Article
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The new mineral gajardoite (IMA2015-040), KCa 0.5 As 3+ 4 O 6 Cl 2 ·5H 2 O, was found at the Torrecillas mine, Iquique Province, Chile, where it occurs as a secondary alteration phase in association with native arsenic, arsenolite, chongite, talmessite and torrecillasite. Gajardoite occurs as hexagonal plates up to ∼100 μm in diameter and 5 μm thic...
Article
Whiteite-(CaMgMg), CaMg3Al2(PO4)4(OH)2.8H2O, is a new mineral from the Northern Belle mine, Candelaria, Nevada, U.S.A. It is a low temperature, secondary mineral presumed to have formed as a result of hydrothermal alteration. It is associated with crandallite, fluorwavellite, montgomeryite, and variscite/metavariscite. The mineral occurs as colorle...