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Katophorite [abbr. Ktp, Mkt ]

Year of discovery: 1894 (Hpakant-Tawmaw Tract, Myanmar), 1964 (Japan)

Locality list: 17 localities of katophorite

• Na₂CaMg₄Al₂Si₇O₂₂(OH)₂
• Na₂CaMg₄(Al,Fe)AlSi₇O₂₂(OH)₂
• [Na⁺][Ca²⁺][Na⁺][Mg²⁺₄][Al³⁺][(OH)₂|AlSi₇O₂₂]^15-
• Definition before 2012 had been Fe > Mg.

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

• Na₂ => Ca: Magnesiohornblende

• Mg => Fe: Ferro-katophorite (Series)

• Al => Fe: Ferri-katophorite

• NaAl => []Si: Winchite

• Al₂ => MgSi: Richterite

• MgSi => Al₂: Taramite

• Color: Greenish black
• Streak: Grayish brown
• Luster: Vitreous
• Diaphaneity: Translucent

• Habit: Acicular, Prismatic

• Cleavage: Perfect on {110} (2 planes, 120 degree), Parting on {010} (1 plane)
• Hardness: 5
• Density: 3.4

• System: Monoclinic
• Group: 2/m, C2/m

Synonym: Magnesiokatophorite