[ Top ] [ Japanese ]

Syngenite

Year of discovery: 1872 (Kalusa deposit, Ukraine), 1969 (Japan)

Locality list: 2 localities of syngenite

• K₂Ca(SO₄)₂,H₂O
• [K⁺₂][Ca²⁺][(SO₄)₂]^4-,H₂O

• Class: Sulfate - Hydrate
• Radioactive: Very weak

• K => NH₄: Koktaite

• Color: Colorless, White
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: Perfect on {110} and {100} (3 planes), Distinct on {010} (1 plane)
• Hardness: 2.5
• Density: 2.6

• System: Monoclinic
• Group: 2/m, P2₁/m
• Lattice: a=9.8, b=7.1, c=6.3, β=104.0