Rowleyite
Rowleyite is an IMA-recognized mineral species in the halide class, with the chemical formula [Na(NH₄,K)₉Cl₄][V⁵⁺,⁴⁺₂(P,As)O₈]₆·n[H₂O,Na,NH₄,K,Cl].
It crystallizes in the cubic crystal system (space group Fd-3m).
Key properties: Mohs hardness 2; specific gravity 2.23; Brownish green streak; Vitreous luster.
IMA symbol Rwl, IMA status: approved, named in 2016.
A low-temperature, post-mining secondary mineral in a hot humid tunnel encrusted nearby with bat guano.
It is found associated with Antipinite, fluorite, mimetite, mottramite, quartz, salammoniac, struvite, vanadinite, willemite, wulfenite.
The name refers to the mine that yielded the first specimens.
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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