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Rooseveltite

Year of discovery: 1946 (Santiaguill, Bolivia)

Locality list:

• BiAsO₄
• [Bi³⁺][AsO₄]^3-

• Class: Arsenate
• Soluble in: HCl, HNO₃, H₂SO₄

• Polymorph: Tetrarooseveltite (Tetragonal)

• Bi => Y: Chernovite-(Y)
• Bi => Ce: Chernovite-(Ce), Gasparite-(Ce)
• Bi => La: Gasparite-(La)

• AsO₄ => PO₄: Ximengite
• AsO₄ => VO₄: Dreyerite, Pucherite, Clinobisvanite

• Color: White, Pale gray, Pale green, Yellow
• Streak: Pale green
• Luster: Adamantine
• Diaphaneity: Transparent

• Cleavage: None
• Hardness: 4-4.5
• Density: 6.9-7.0

• System: Monoclinic
• Group: 2/m
• Lattice: a=6.9, b=7.2, c=6.7, β=104.8