Spryite
Spryite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Ag₈(As³⁺₀.₅As⁵⁺₀.₅)S₆.
It crystallizes in the orthorhombic crystal system (space group Pna2_1). It is a member of the Argyrodite structural group.
Key properties: Mohs hardness 2.5–3; specific gravity 6.334; Metallic luster.
IMA symbol Syi, IMA status: approved, named in 2015.
Found in a hydrothermal Ag-Ge-Mn deposit.
It is found associated with Proustite, argyrodite, galena, Mn-bearing calcite.
The mineral was named to honor Paul G. Spry (b. 1955), Professor of Economic Geology, Iowa State University, USA.
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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