Tsumgallite
Tsumgallite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula GaO(OH).
It crystallizes in the orthorhombic crystal system. It is a member of the Diaspore structural group.
Key properties: specific gravity 5.08; White streak; Pearly luster.
IMA symbol Tgl, IMA status: approved, named in 2002.
Found in vugs within tennantite-germanite ore from the oxidation zone.
It is found associated with Söhngeite, zincian siderite, chalcocite, tennantite, germanite, quartz.
Refers to the locality, Tsumeb, and gallium in the essential chemical composition.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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