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Hydroxylherderite

Year of discovery: 1894 (World), 1997 (Japan)

Locality list: 2 localities of hydroxylherderite

• CaBePO₄(OH)
• CaBePO₄(OH,F)
• [Ca²⁺][Be²⁺][OH|PO₄]^4-

• Class: Phosphate - Hydroxide
• Soluble in: HCl, HNO₃, H₂SO₄
• Fluorescence: Short UV excitation (Yellow), Phosphorescence (Yellow)

• OH => F: Herderite (Series)

• PO₄ => AsO₄: Bergslagite

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

• Cleavage: Indistinct on {110} (2 planes)
• Hardness: 5-5.5
• Density: 3.0

• System: Monoclinic
• Group: 2/m, P2₁/a
• Lattice: a=9.8, b=7.7, c=4.8, β=90.0