Nanlingite
Nanlingite is an IMA-recognized mineral species in the arsenate class, with the chemical formula Na(Ca₅Li)Mg₁₂(AsO₃)₂[Fe²⁺(AsO₃)₆]F₁₄.
It crystallizes in the hexagonal crystal system (space group R3m).
Key properties: Mohs hardness 2.3; specific gravity 3.927; Pale yellow streak; Vitreous luster; optically uniaxial.
IMA symbol Nan, IMA status: approved, named in 1976.
Along a contact between greisenized granite and dolomitic limestone.
It is found associated with Fluorite, fluoborite, zinnwaldite, magnesian dolomite, arsenopyrite, pyrrhotite, gahnite, nigerite.
The name is derived from the locality, Nanling area, China, that produced the first samples.
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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