[ Top ] [ Japanese ]

Danalite

Year of discovery: 1866 (Rockport, USA), 1968 (Japan)

Locality list: 5 localities of danalite

• Fe₄Be₃(SiO₄)₃S
• [Fe²⁺₄][S|(Be²⁺SiO₄)₃]^8-

• Class: Helvine group
• Class: Tecto-Beryllium Silicate - Sulfide
• Soluble in: HCl (Gel residue)
• Odor: Rotten egg odor (by solving in HCl)

• Fe => Mn: Helvine (Series)
• Fe => Zn: Genthelvite (Series)

• Color: Pink, Reddish brown, Yellow
• Streak: Gray
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: Indistinct on {111} (4 planes)
• Hardness: 5.5-6
• Density: 3.4

• System: Cubic
• Group: (-4)3m, P(-4)3n
• Lattice: a=8.2