Thorosteenstrupine
Thorosteenstrupine is an IMA-recognized mineral species in the silicate class, with the chemical formula (Ca,Th,Mn)₃Si₄O₁₁F·6H₂O.
Key properties: Mohs hardness 4; specific gravity 3.02; Dark brown streak; Greasy to vitreous luster.
IMA symbol Tssp, IMA status: approved, named in 1962.
Found in metasomatic veins.
It is found associated with Microcline, albite, \aegirine-augite, " quartz, fluorite, thorite, miserite.
The name refers to thorium in the composition and its close relation to steenstrupine.
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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