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Arsentsumebite: Pb2Cu(AsO4)(SO4)(OH)
Comments: Crystallized arsentsumebite in a vuggy rock matrix. Location: Tsumeb Mine, Tsumeb, Namibia. Scale: Crystals to 0.25mm. © John Veevaert
Arsenuranospathite: HAl(UO2)4(AsO4)4·40(H2O)
Comments: Yellowgreen to brown arsenuranospathite crust on matrix. Location: Elias Mine, Jachymov, Bohemia, Czech Republic. Scale: Specimen Size 2.1x2.7 cm. © Diederik Visser
Arsenuranylite: Ca(UO2)4(AsO4)2(OH)4·6(H2O)
Comments: Yellow crystalline arsenuranylite. Location: Rudnoje, Bukhara District, Uzbekistan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Arthurite: CuFe+++2(AsO4,PO4,SO4)2(O,OH)2·4(H2O) Pharmacosiderite: KFe+++4(AsO4)3(OH)4·6-7(H2O)
Comments: Altered rhyolite vug lined with brilliant apple green arthurite and cubic green crystals of pharmacosiderite. Location: Majuba Hill Mine, Pershing County, Nevada. USA. Scale: 2.7 x 1.7 cm. © John Veevaert
Arthurite: CuFe+++2(AsO4,PO4,SO4)2(O,OH)2·4(H2O)
Comments: Radiating sprays of acicular arthurite. Location: Majuba Hill mine, Pershing County, Nevada, USA. Scale: Spray size 2.5 mm. © Tom Loomis / Dakota Matrix
Artinite: Mg2(CO3)(OH)2·3(H2O)
Comments: Bright, white acicular sprays of artinite crystals on matrix. Location: New Idria district, San Benito County, California, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Comments: White, acicular clusters of artinite on matrix. Location: San Benito County, California, USA. Scale: Cluster size 1.3 cm. © Sandro Maggia/Minernet.it
Artsmithite: Hg+4Al(PO4)1.74(OH)1.78
Comments: White to tan, radial, acicular crystals of artsmithite on matrix. Location: Funderburk Prospect, Pike County, Arkansas, USA. Scale: Picture size 0.7 cm. © Jeff Weissman / Photographic Guide to Mineral Species
Comments: White or faint green platy micro crystals of artsmithite on matrix. Location: Funderburk prospect, Pike County, Arkansas, USA. Scale: Crystal size 0.5 mm. © Tom Loomis / Dakota Matrix
Arzakite: Hg3S2(Br,Cl)2
Comments: Orange brown arzakite crystals lining vug, co-type material; associated with jarosite (sharp crystals), montroydite (dark red - blackish). Location: Arzak deposit, Tuva, Siberia, Russia. Scale: See Image. © Rruff Database