[ Top ] [ Japanese ]

Marialite (Photo) [abbr. Mar ]

Year of discovery: 1866 (Pianura, Italy), 1928 (Japan)

Locality list: 8 localities of marialite

• Na₄Al₃Si₉O₂₄Cl
• (Na,Ca)₄Al₃Si₉O₂₄(Cl,CO₃,SO₄)
• [Na⁺₄][Cl|(AlSi₃O₈)₃]^4-

• Class: Scapolite group
• Class: Tecto-Aluminosilicate - Chloride
• Fluorescence: UV excitation (Yellow-Red)
• Substitution pseudomorph: Replaced by Paragonite.

• Na₄Si₃Cl => Ca₄Al₃CO₃: Meionite (Series)

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

• Habit: Prismatic
• Aggregate: Columnar

• Cleavage: Distinct on {100} and {110} (5 planes)
• Hardness: 5.5-6
• Density: 2.6

• System: Tetragonal
• Group: 4/m, I4/m
• Lattice: a=12.1, c=7.6