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Chromio-pargasite

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

Locality list: A locality of chromiopargasite

• NaCa₂Mg₄CrAl₂Si₆O₂₂(OH)₂
• (Na,K)(Ca,Mg)₂Mg₄(Cr,Al,Fe,Ti)Al₂Si₆O₂₂(OH)₂
• [Na⁺][Ca²⁺₂][Mg²⁺₄][Cr³⁺][(OH)₂|(AlSi₃O₁₁)₂]^16-

• Class: Ca amphibole subgroup < w(OH,F,Cl)-dominant amphibole group < Amphibole supergroup
• Class: Ino-Aluminosilicate (Double chain) - Hydroxide

• Cr => Fe: Magnesio-hastingsite
• Cr => Al: Pargasite

• CrAl => MgSi: Edenite

• Color: Green
• Streak: Pale green
• Luster: Vitreous
• Diaphaneity: Transparent

• Cleavage: Perfect on {110} (2 planes, 120 degree)
• Hardness: 6
• Density: 3.1

• System: Monoclinic
• Group: 2/m, C2/m
• Lattice: a=9.9, b=18.0, c=5.3, β=105.4

Synonym: Ehimeite