Iseite
Iseite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Mn₂Mo₃O₈.
It crystallizes in the hexagonal crystal system (space group P6_3mc). It is a member of the Nolanite structural group.
Key properties: Mohs hardness 4–5; specific gravity 5.85; Black streak; Submetallic luster.
IMA symbol Is, IMA status: approved, named in 2012.
Found in a stratiform ferro-manganese deposit, embedded in chert and closely in association with limestone and greenstone in an accretionary complex.
It is found associated with Rhodochrosite, powellite, molybdenite.
The name refers to the city in Japan near which the first specimens were collected.
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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