Rorisite
Rorisite is an IMA-recognized mineral species in the halide class, with the chemical formula CaClF.
It crystallizes in the tetragonal crystal system (space group P4/nmm). It is a member of the Matlockite structural group.
Key properties: Mohs hardness 2; specific gravity 2.78; White streak; Vitreous luster; optically uniaxial.
IMA symbol Rrs, IMA status: approved, named in 1989.
Within carbonized wood in burnt coal dumps.
It is found associated with Fluorite, periclase, troilite.
The name comes from the Latin for dew, in allusion to the transparent drops that cover the mineral in moist air.
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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