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Thomsonite-Sr

Year of discovery: 2000 (Rasvumchorr mountain, Russia), 1999 (Japan)

Locality list: 3 localities of thomsonite-Sr

• NaSr₂Al₅Si₅O₂₀,7H₂O
• [Na⁺][Sr²⁺₂][(AlSiO₄)₅]^5-,7H₂O

• Class: Thomsonite series < Natrolite group < Zeolite family
• Class: Tecto-Aluminosilicate - Zeolitic water

• Sr => Ca: Thomsonite-Ca

• Color: Colorless
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent

• Cleavage: Perfect on {100} (1 plane), Good on {010} (1 plane)
• Hardness: 5
• Density: 2.5

• System: Orthorhombic
• Group: mmm, Pcnn
• Lattice: a=13.1, b=13.1, c=13.2

Etymology: Thomas Thomson, Scottish chemist