[ Top ] [ Japanese ]

Dukeite

Year of discovery: 1999 (Posse mine, Brazil), 2010 (Japan)

Locality list: A locality of dukeite

• Bi₂₄Cr₈O₅₇(OH)₆,3H₂O
• [Bi³⁺₂₄][(OH)₆|O₂₅|(CrO₄)₈]^72-,3H₂O

• Class: Chromate - Oxide - Hydroxide - Hydrate

• Color: Yellow-Yellowish brown
• Streak: Yellow
• Luster: Resinous
• Diaphaneity: Transparent-Translucent

• Cleavage: No
• Hardness: 3-4

• System: Trigonal
• Group: 3m, P3₁c
• Lattice: a=15.1, c=15.3