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Arsenogorceixite: BaAl3AsO3(OH)(AsO4,PO4)(OH,F)6
Comments: Lime colored crystalline arsenogorceixite on dark green olivenite. Location: Bali Lo, Ashburton Downs, Western Australia, Australia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Arsenogoyazite: (Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5·(H2O) Olivenite: Cu2AsO4(OH)
Comments: White micro-botryoids of arsenogoyazite with light green acicular crystal sprays of olivenite and dark green malachite on brown limonite. Location: Centennial Eureka Mine, Juab County, Utah. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Arsenopalladinite: Pd8(As,Sb)3
Comments: Arsenopalladinite micro crystal. Location: Itabira, Minas Gerais, Brazil. Scale: Not Given. © Jeff Weissman / Photographic Guide to Mineral Species
Arsenpolybasite: [Ag9CuS4] [(Ag,Cu)6(As,Sb)2S7]
Comments: Back, crystalline arsenpolybasite in quartz. Location: Medenec, Severocesky, Moravia, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
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
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
Ashburtonite: HPb4Cu++4Si4O12(HCO3)4(OH)4Cl
Comments: Blue-green crystalline crust of ashburtonite on matrix. Location: Anticline Deposit, Ashburton Downs, Western Australia, Australia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Athabascaite: Cu5Se4 Umangite: Cu3Se2 Berzelianite: Cu2Se
Comments: Reflected light photomicrograph of umangite (pinkish), berzelianite (gray), athabascaite (small white areas in berzelianite), calcite (olive). Location: Sierra de Umango, La Rioja, Argentin. Scale: Not Given. © Jeff Weissman / Photographic Guide to Mineral Species
Attakolite: (Ca,Sr)Mn++(Al,Fe+++)4[(Si,P)O4]H(PO4)3(OH)4
Comments: Pink to yellowish attakolite with black hematite. Location: Vestana Iron Mine, near Nasum, Skane, Varmland, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Aubertite: CuAl(SO4)2Cl·14(H2O)
Comments: Aqua to white massive aubertite. Location: Chuquicamata, Antofagasta, Chile. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species