Jianshuiite
Jianshuiite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula MgMn⁴⁺₃O₇·3H₂O.
It crystallizes in the triclinic crystal system (space group P-1).
Key properties: specific gravity 3.5–3.6.
IMA symbol Jia, IMA status: approved, named in 1990.
A hypogene mineral in manganese ore (Lu Village, China); authigenic in manganese oxide concretions in siltstone (San Felipe, Mexico).
It is found associated with Hydrated manganese oxides (Lu Village, China); magnetite, maghemite, goethite, hematite, calcite, quartz, mica, clay minerals (San Felipe, Mexico).
The name refers to its occurrence in Jianshui Co., Yunnan Province, China.
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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