Uramphite
A rare hydrated ammonium uranyl phosphate.
Intro adapted from Wikipedia (CC BY-SA).
Uramphite is an IMA-recognized mineral species in the phosphate class, with the chemical formula (NH₄)(UO₂)(PO₄)·3H₂O.
It crystallizes in the tetragonal crystal system (space group P4/ncc). It is a member of the Natroautunite structural group.
Key properties: specific gravity 3.7; Vitreous luster; optically biaxial.
IMA symbol Uap, grandfathered status — known before the IMA’s founding, named in 1957.
Found in the oxidized zone of a uranium-coal deposit, in fractures in the coal at depths between 20 and 50 m.
The name refers to its content of URanium, AMmonium, and PHosphate.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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