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Ferrierite-Mg

Year of discovery: 1918 (Kamloops lake, Canada), 1962 (Japan)

Locality list: 27 localities of ferrierite-Mg

• Mg₂(Al,Si)₁₈O₃₆,9H₂O
• (Mg,K₂,Na₂)Mg(Si,Al)₁₈O₃₆,9H₂O
• [Mg²⁺][Mg²⁺][(Al,Si)₁₈O₃₆]^4-,9H₂O

• Class: Ferrierite series < Mordenite group < Zeolite family
• Class: Tecto-Aluminosilicate - Zeolitic water
• Radioactive: Very weak

• Mg => K₂: Ferrierite-K
• Mg => Na₂: Ferrierite-Na

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

• Cleavage: Perfect on {100} (1 plane), Imperfect on {001} (1 plane)
• Hardness: 3-3.5
• Density: 2.1

• System: Orthorhombic
• Group: mmm, Pnnm
• Lattice: a=19.2, b=14.1, c=7.5