vrbaite

Vrbaite (symbol: Vrb) is an opaque to subtranslucent brittle mineral with chemical formula Tl4Hg3Sb2As8S20 and pyramidal crystals. It is names after Czech mineralogist . It is bluish white with red internal reflections and dark red in translucent thin fragments. It is classified in the class "sulfides and sulfosalts".

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Image: Vrbaite-91144.jpg

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Nickel-Strunz '10th ed', review of (9th ed/ 2009 update): 2.HF.20
Commons category: Vrbaite
Nickel-Strunz 9th edition (updated 2009): 2.HF.20
chemical formula: Hg₃Tl₄As₈Sb₂S₂₀
IMA Mineral Symbol: Vrb
Strunz 8th edition (series ID, updated): II/D.03 – Anhang

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{{Infobox mineral | name = Vrbaite | nameIUPAC = | strunz = | dana = 03.07.15.01 | largeurbox = | image = Vrbaite-91144.jpg | imagesize = 280 | caption = Vrbaïte, Crven Dol Mine, Allchar (Alsar), Roszdan, North Macedonia | formula = Tl4Hg3Sb2As8S2

| color = black, gray-black, bluish, dark red; on polished sections, bluish white with internal red highlights | class = Dipyramidal ; C mca{C 2/m 2/c 2/a} | system = orthorhombic | fracture = uneven/irregular to conchoidal | tenacity = 3,5