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Tanohataite

Year of discovery: 2012 (Japan as the first occurence in the World)

Locality list: A locality of tanohataite

• LiMn₂(HSi₃O₉)
• (Li,Na)(Mn,Ca,Mg)₂(HSi₃O₉)
• [Li⁺][Mn²⁺₂][HSi₃O₉]^5-

• Class: Wollastonite group < 3-periodic < Pyroxenoid
• Class: Inosilicate (Single chain) - Hydroxide
• Physical: Elastic (Similar appearance Sérandite and Rhodonite are not elastic and easily powdered.)

• Li => Na: Sérandite (Serandite)

• LiH => Mn: Vittinkiite, Pyroxmangite

• Mn => Ca: Murakamiite

• Color: Pale pink
• Tarnish: Black
• Streak: White
• Luster: Vitreous-Silky
• Diaphaneity: Transparent

• Habit: Fibrous

• Cleavage: Perfect on {001}{100} (2 planes)
• Hardness: 5-5.5

• System: Triclinic
• Group: (-1), P(-1)
• Lattice: a=7.6, b=7.0, c=6.7, α=90.2, β=94.7, γ=105.3

Etymology: Tanohata mine in Iwate prefecture. Japan, where this mineral was discovered for the first time.