a = 9.124 Å, b = 6.329 Å c = 7.577 Å; β = 115.3°; Z = 2
Identification
Formula mass
624.29 g/mol
Color
Yellow-brown, red-brown, orange
Crystal habit
Radiating, fibrous crusts
Twinning
Common, on an unknown law
Cleavage
Good on {001}
Mohs scale hardness
4+1⁄2
Luster
Vitreous
Streak
Yellow
Diaphaneity
Translucent
Specific gravity
5.2
Optical properties
Biaxial
Refractive index
nα = 1.87–1.91 nβ = 1.89–1.93 nγ = 1.92–1.96
Pleochroism
Weak, yellow to yellow-green
2V angle
67–83.5°
Solubility
Dissolves in HCl
References
[2][3][4][5][6][7]
Tsumcorite is a rare hydrated lead arsenate mineral that was discovered in 1971, and reported by Geier, Kautz and Muller.[6] It was named after the TSUMeb CORporation mine at Tsumeb, in Namibia, in recognition of the Corporation's support for mineralogical investigations of the orebody at its Mineral Research Laboratory.[5]
^Gaines et al (1997) Dana’s New Mineralogy Eighth Edition. Wiley
^Mindat.org
^Webmineral data
^ abHandbook of Mineralogy
^ abFleischer M (1972) New mineral names, American Mineralogist 57, 1558, being a summary of Geier, Kautz and Muller (1971) Neues Jahrbuch fur Mineralogie (Monatshefte) 1971: 304–309
^Tillmanns, E.; Gebert, W. (1 December 1973). "The crystal structure of tsumcorite, a new mineral from the Tsumeb mine, S. W. Africa". Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry. 29 (12): 2789–2794. doi:10.1107/S0567740873007545.
Tsumcorite is a rare hydrated lead arsenate mineral that was discovered in 1971, and reported by Geier, Kautz and Muller. It was named after the TSUMeb...
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