Ammoniotinsleyite
Ammoniotinsleyite is an IMA-recognized mineral species in the phosphate class, with the chemical formula (NH₄)Al₂(PO₄)₂(OH)·2H₂O.
It crystallizes in the monoclinic crystal system (space group P2_1/n). It is a member of the Leucophosphite structural group.
Key properties: Mohs hardness 4; specific gravity 2.42; White streak; Vitreous luster; optically biaxial.
IMA symbol Atin, IMA status: approved, named in 2020.
Found in a guano deposit in a desert.
It is found associated with Halite, gypsum, salammoniac, clay minerals.
The prefix identifies the ammonium analogue of tinsleyite.
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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