Mineralpedia Details for Masutomilite
Masutomilite
Phyllosilicate - Monoclinic - Mica group member. Ordinary (True or Common) Mica - Trioctahderal. Contains Li, Al, Mn2+ in the (M) octahedral sites with F>OH in the (A) position. Mindat places K & Rb in the Interlayer sites.
Rare worldwide with only in two in the USA, originally described from Japan. According to Bernard & Hyrsl, occurs in Na-Li rich pegmatites in Czech Republic, and Japan and is typically purple to pink.
- Formula
- KLiAlMn2+(Si3Al)O10(F,OH)2
- Crystal System
- Monoclinic
- Crystal Habit
- Pseudo Hexagonal
- Cleavage
- Perfect, None, None
- Luster
- Vitreous - Pearly
- Color
- purple pink
- Streak
- white
- Class
- Monoclinic - Prismatic
- Hardness
- 2.5
- WebMineral
- View Masutomilite
- Mindat
- View Masutomilite
Masutomilite from Hirukawa, Gifu Pref., Chubu, Honshu Island, Japan
Phyllosilicate - Monoclinic - Mica group member. Ordinary (True or Common) Mica - Trioctahderal. Contains Li, Al, Mn2+ in the (M) octahedral sites with F>OH in the (A) position. Mindat places K & Rb in the Interlayer sites.
Rare worldwide with only in two in the USA, originally described from Japan. According to Bernard & Hyrsl, occurs in Na-Li rich pegmatites in Czech Republic, and Japan and is typically purple to pink.
