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Magnesio-ferri-hornblende

Year of discovery: 2022 (Jinghe Co., China), 2024 (Japan)

Locality list: A locality of magnesio-ferri-hornblende

• Ca₂Mg₄FeAlSi₇O₂₂(OH)₂
• [][Ca²⁺₂][Mg²⁺₄][Fe³⁺][(OH)₂|AlSi₇O₂₂]^15-

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

• Fe => Mg: Ferro-ferri-hornblende

• Fe => Al: Magnesio-hornblende

• OH => F: Magnesio-ferri-fluoro-hornblende

• Color: Dark green, Greenish black
• Streak: Pale grayish green, Grayish white
• Luster: Vitreous

• Cleavage: Good on {110} (2 planes)
• Hardness: 5
• Density: 3.3

• System: Monoclinic
• Group: 2/m, C2/m
• Lattice: a=9.9, b=18.1, c=5.3, β=104.8