Alflarsenite
Alflarsenite is an IMA-recognized mineral species in the silicate class, with the chemical formula NaCa₂Be₃Si₄O₁₃(OH)·2H₂O.
It crystallizes in the monoclinic crystal system (space group P2_1).
Key properties: Mohs hardness 4; specific gravity 2.605; White streak; Vitreous luster; optically biaxial.
IMA symbol Alf, IMA status: approved, named in 2008.
A late-stage hydrothermal mineral in a syenitic pegmatite in larvikite.
It is found associated with Calcite, analcime, K-feldspar.
The mineral was named to honor Alf Olav Larsen (b. 1952), Norwegian self-taught mineralogist who has contributed to the description of six new mineral species.
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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