Hydroromarchite
Hydroromarchite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Sn²⁺₃O₂(OH)₂.
It crystallizes in the tetragonal crystal system (space group P-42_1c).
Key properties: specific gravity 4.904; Adamantine luster.
IMA symbol Hrom, IMA status: approved, named in 1969.
Interstitial in quartz-calcite gangue of a massive sphalerite-pyrite ore body (Italy). Generally, of anthropogenic origin by preferential leaching and oxidation of tin from tin, bronze.
It is found associated with Romarchite (Canada); siderite, pyrite, smithsonite, sphalerite, barite, an unidentified Fe-Ca sulfate (Italy).
As a HYDROus mineral related to romarchite.
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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