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Billingsleyite: Ag7AsS6
Comments: Gray-black billingsleyite crystals on matrix with famatinite, arsenopyrite. Location: Grube Clara, Oberwolfach, Schwarzwald, Germany. Scale: Picture size 1.0 x 0.6 cm. © Diederik Visser
Bindheimite: Pb2Sb2O6(O,OH)
Comments: Yellow earthy bindheimite covering red, massive crocoite. Location: Callenberg North (no. 1) open cut, Callenberg, Glauchau, Saxony, Germany. Scale: Picture size 7 mm. © Thomas Witzke / Abraxas-Verlag
Biotite: K(Mg,Fe++)3[AlSi3O10(OH,F)2
Comments: Brown book of pseudohexagonal biotite crystals in matrix. Location: Sattleberg, Laacher See, Rhineland-Palatinate, Germany. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Biotite: K(Mg,Fe++)3[AlSi3O10(OH,F)2 Wohlerite: NaCa2(Zr,Nb)Si2O7(O,OH,F)2
Comments: Prismatic wohlerite crystals with lepidomelane (Fe-rich biotite). Location: Langevannet, Tvedalen, Telemark, Norway. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Biotite: K(Mg,Fe++)3[AlSi3O10(OH,F)2 Anthophyllite: [ ]Mg7Si8O22(OH)2
Comments: Fibrous mass of anthophyllite as a shell around biotite. Location: Hermanov, Severocesky, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Comments: Sharp hexagonal plates of dark brown biotite to 2.5 cm. across, with white albite. Location: Brazil. Scale: 6.9x5.5x3 cm. © Richard Dale / Dale Minerals
Biphosphammite: (NH4,K)H2PO4 Archerite: (K,NH4)H2PO4
Comments: Buff-colored biphosphammite with white archerite crusts. Location: Cockelbiddy Cave, Western Australia, Australia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Biphosphammite: (NH4,K)H2PO4
Comments: Vuggy, dark green-brown biphosphammite. Location: Mason Bat Cave, Mason County, Texas, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Biraite-(Ce): Ce2Fe++(CO3)(Si2O7)
Comments: Brown grains of biraite-(Ce) in matrix. Location: Biraya Fe-REE Ore occurrence, Vitim Highland, Buratie Republic, Eastern Siberia, Russia. Scale: Not Given. © Diederik Visser
Birchite: Cd2Cu2(PO4)2(SO4)·5H2O
Comments: SEM image showing bladed crystals of birchite on anglesite. The crystals are flattened on (100) and show the principal forms {100}, {010}, and {101}. (AmMin, v93:912). Location: Block 14 Opencut, Broken Hill, New South Wales, Australia. Scale: Scale Bar 50µm. © American Mineralogist