Thomas Witzke's Image Gallery

Pentlandite: (Fe,Ni)9S8  
Plumbopalladinite: Pd3Pb2  
Valleriite: 4(Fe,Cu)S·3(Mg,Al)(OH)2  
Cubanite: CuFe2S3

Comments: Polished Section image (PPL) of plumbopalladinite (Pl) with polarite Po), surrounded by a rim of isoferroplatinum (Iso) with cubanite (Cu), pentlandite (Pe), and valleriite (Va).
Location: Majak Mine, Talnakh, Norilsk, Ural, Russia. Scale: Picture Size 0.7 mm.
© Thomas Witzke

Periclase: MgO

Comments: Green nickel-rich periclase on matrix.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Periclase: MgO  
Srebrodolskite: Ca2Fe+++2O5

Comments: Black grains of srebrodolskite with white periclase.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Petterdite: PbCr+++2(CO3)2(OH)4·H2O

Comments: Pinkish-violet crystalline aggregate of petterdite on matrix.
Location: Callenberg North (no. 1) open cut, Callenberg, Glauchau, Saxony, Germany. Scale: Picture size 2.5 mm.
© Thomas Witzke / Abraxas-Verlag

Phoenicochroite: Pb2(CrO4)O

Comments: Deep red phoenicochroite with crocoite in matrix.
Location: Callenberg North (no. 1) open cut, Callenberg, Glauchau, Saxony, Germany. Scale: Picture size 6.5 mm.
© Thomas Witzke / Abraxas-Verlag

Phuralumite: Al2(UO2)3(PO4)2(OH)6·10(H2O)

Comments: Yellow crystals of phuralumite scattered on white matrix.
Location: Kobokobo Pegmatite, Lusungu River District, Kivu, Congo (Zaïre). Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Pitiglianoite: Na6K2Si6Al6O24(SO4)·2(H2O)

Comments: Colorless, prismatic crystals of pitiglianoite.
Location: Monte Cavallucio, Sacrofano, Campagnano, Lazio, Italy. Scale: Picture size 2.5 mm.
© Thomas Witzke / Abraxas-Verlag

Pitticite: Hydrous ferric arsenate sulfate (Fe, AsO4, SO4, H2O)

Comments: Dark brown to orange-brown massive Pitticite.
Location: Graul, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Platinum: Pt  
Cherepanovite: RhAs  
Cooperite: (Pt,Pd,Ni)S

Comments: Creamy-grayish fractured grains of cherepanovite with gray granular cooperite and white massive grains of iridian ruthenian platinum. Polished section in reflected light.
Location: Placer Deposit, Northern Pekul'nei River, Pekul'nei Range, Chukotka (Tchukotka) Okrug, Chukot Peninsula, Far-Eastern Region, Russia. Scale: Picture size 0.12 mm.
© Thomas Witzke / Abraxas-Verlag

Plumbojarosite: PbFe+++6(SO4)4(OH)12  
Galena: PbS

Comments: Yellow, earthy plumbojarosite on massive, gray galena.
Location: Quarry No 3, Königshain, Oberlausitz, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Plumbopalladinite: Pd3Pb2  
Valleriite: 4(Fe,Cu)S·3(Mg,Al)(OH)2  
Cubanite: CuFe2S3  
Pentlandite: (Fe,Ni)9S8

Comments: Polished Section image (PPL) of plumbopalladinite (Pl) with polarite Po), surrounded by a rim of isoferroplatinum (Iso) with cubanite (Cu), pentlandite (Pe), and valleriite (Va).
Location: Majak Mine, Talnakh, Norilsk, Ural, Russia. Scale: Picture Size 0.7 mm.
© Thomas Witzke

Polydymite: NiNi2S4

Comments: Octahedral crystals of polydymite on matrix.
Location: Grüneau Mine (Grüne Au Mine; Grünau Mine), Schutzbach, Betzdorf, Siegen District (W), Rhineland-Palatinate, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Polyhalite: K2Ca2Mg(SO4)4·2(H2O)

Comments: White crystals of polyhalite in matrix.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Ponomarevite: K4Cu++4OCl10

Comments: Orange ponomarevite. The sample stored in a closed vial. The photo was made through the vial.
Location: Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Poughite: Fe+++2(TeO3)2(SO4)·3(H2O)

Comments: Yellow coatings of poughite on matrix.
Location: Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Preisingerite: Bi3(AsO4)2O(OH)

Comments: Olive-greenish crystals of preisingerite on quartz.
Location: Pucher Shaft, Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Prismatine: ([ ],Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22

Comments: Prismatic crystals of prismatine in matrix.
Location: Waldheim, Saxony, Germany. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Probertite: NaCaB5O7(OH)4·3(H2O)

Comments: Large colorless prismatic crystal of probertite.
Location: Niedersachswerfen, Nordhausen, Erfurt district, Harz Mts, Thuringia, Germany. Scale: Crystal length 4.7 cm.
© Thomas Witzke / Abraxas-Verlag

Proshchenkoite-(Y): (Y,REE,Ca,Na,Mn)15Fe++Ca(P,Si)Si6B3(O,F)48

Comments: Brown grains of proshchenkoite-(Y) on filter paper used for XRD analysis.
Location: Tommot, Yakutia, Russia. Scale: Grain Size 0.3 mm.
© Thomas Witzke

Protasite: Ba(UO2)3O3(OH)2·3(H2O)

Comments: Orange crystals of protasite on matrix.
Location: Shinkolobwe mine (Kasolo mine), Shaba (Katanga), Congo (Zaïre). Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag