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Demartinite: K2[SiF6]
Comments: SEM image of a tapering, hexagonal demartinite crystal. (CanMin, v45:1275). Location: La Fossa crater, Vulcano, Eolian Islands, Italy.. Scale: See Image. © Canadian Mineralogist
Donharrisite: Ni8Hg3S9
Comments: BSE photomicrograph of donharrisite showing remnants of subhedral polydymite crystals. (CanMin, v27:257). Location: Found on a museum specimen from the former Erasmus miue, Schwardsp mining district, Leogang, Salzburg Province, Austria. Scale: Scale Bar 20 µm. © Canadian Mineralogist
Ercitite: Na2(H2O)4[Mn+++2(OH)2(PO4)2]
Comments: Back-scattered electron images of ercitite (medium gray) showing lath-shaped habit and cleavages and splintering on mechanical disturbance. W: whitlockite, F: fairfieldite, C: unidentified. (CanMin, v 38, p 896). Location: Tanco pegmatite, southeastern Manitoba, Canada. Scale: Image size 150 µ-m. © Canadian Mineralogist
Eyselite: Fe+++Ge++++3O7(OH)
Comments: Pale yellowish brown crystalline aggregate of eyselite in a vug on sulfide ore. (CanMin 42:1773). Location: Ge-bearing ore samples from Tsumeb mine, Tsumeb, Namibia. Scale: See Scale Bar. © Canadian Mineralogist
Comments: SEM photomicrograph of platy/tabular crystals of eyselite. (CanMin 42:1773). Location: Ge-bearing ore samples from Tsumeb mine, Tsumeb, Namibia. Scale: See Scale Bar. © Canadian Mineralogist
Ferronickelplatinum: Pt2FeNi
Comments: SEM image of ferronickelplatinum (Fnp), PGE alloys (Al), in a matrix of ferrian chromite (Fe-Chr). (CanMin, v45:631). Location: Loma Peguera chromitites, Cordillera Central, Dominican Republic. Scale: Scale Bar 5 µn. © Canadian Mineralogist
Feruvite: (Ca,Na)(Fe,Mg,Ti)3(Al,Mg,Fe)6(BO3)3Si6O18(OH)4
Comments: BSE image of a typical zoned feruvite-dravite crystal in quartz. The lighter gray core is feruvite (F), and the darker rim and overgrowths consist of dravite (D). The white grains are chlorapatite.. Location: Tourmalinized rock at Cuvier Island, New Zealand. (CanMin, v27:199). Scale: Scale Bar 100 µm. © Canadian Mineralogist
Fluorvesuvianite: Ca19(Al,Mg)13[SiO4]10[Si2O7]4(F,OH)10
Comments: Acicular crystals of fluorvesuvianite in a clear, calcite matrix. (CanMin, v 41, p 1375). Location: Lupikko iron mine, Pitkaranta, Karelia, Russia. Scale: Picture size 1.2 cm. © Canadian Mineralogist
Freudenbergite: Na2Fe+++2Ti6O16
Comments: BSE image of a sector-zoned crystal of freudenbergite. The bright pyramids correspond to sector (001), and the darker ones belong to sector (100). Location: Peralkaline alkali syenite dikes at Katzenbuckel, southwestern Germany. Scale: See Image. © Canadian Mineralogist
Gabrielite: Tl2AgCu2As3S7
Comments: SEM picture of gabrielite showing the dominant (001) face with striation along a axis and (presumable) twinning along (100). (CanMin, v44:135). Location: Lengenbach locality, at Binntal, Canton Valais, Switzerland. Scale: See Image. © Canadian Mineralogist