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pyrophanite
Pyrophanite is a manganese titanium oxide mineral with formula: MnTiO3. It is a member of the ilmenite group. It is a deep red to greenish black mineral which crystallizes in the trigonal system. It is a member of the ilmenite group.
==Discovery and occurrence==
It was first described in 1890 from an occurrence in the Harstigen Mine, Filipstad, Värmland, Sweden.〔 Its name was derived from the Greek ''πΰρ,'' fire, and ''φαίνεσθαι,'' to appear, because of the deep red color of the mineral.〔
Its main occurrence is in manganese deposits that have undegone metamorphism. It also occurs in granite, amphibolite and serpentinite as an uncommon accessory
mineral. Associated minerals include ilmenite, geikielite, hematite, spinel, gahnite, chromite, magnetite, ganophyllite, manganophyllite, hendricksite, garnet and calcite.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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