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Szaibélyite, Szaibelyite

Year of discovery: 1861 (Băiţa district, Romania), 1956 (Japan)

Locality list: 5 localities of szaibélyite

• MgBO₂(OH)
• (Mg,Fe)BO₂(OH)
• [Mg²⁺₂][OH|HB₂O₅]^4-

• Class: Soro-Borate - Hydroxide
• Soluble in: HCl (Slowly), HNO₃ (Slowly), H₂SO₄ (Slowly)
• Fluorescence: UV excitation (Yellowish brown)
• Formed by alteration of Colemanite, Inyoite, and Hydroboracite.

• Mg => Ca: Sibirskite, Parasibirskite
• Mg => Mn: Sussexite (Series)

• Color: White, Pale yellow
• Streak: White
• Luster: Silky
• Diaphaneity: Transparent-Translucent

• Cleavage: No
• Hardness: 3-3.5
• Density: 2.6

• System: Monoclinic
• Group: 2/m, P2₁/a
• Lattice: a=12.6, b=10.4, c=3.1, β=95.9