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Henrymeyerite

Year of discovery: 2000 (Kovdor Zheleznyi mine, Russia), 2022 (Japan)

Locality list: A locality of henrymeyerite

• BaTi₇FeO₁₆
• Ba(Ti₇Fe)O₁₆
• [Ba²⁺][Ti⁴⁺₇][Fe²⁺][O₁₆]^32-

• Class: Cryptomelane group
• Class: Oxide

• Ba => K: Priderite

• FeTi₇ => Mn₈: Hollandite

• Color: Grayish brown, Black
• Streak: Reddish brown
• Luster: Adamantine
• Diaphaneity: Opaque

• Cleavage: No
• Hardness: 5-6
• Density: 4.0

• System: Tetragonal
• Group: 4/m, I4/m
• Lattice: a=10.2, c=3.0