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Rowlandite-(Y)

• Y₄FeSi₄O₁₄F₂
• (Y,Ce)₄FeSi₄O₁₄F₂
• [Y³⁺₄][Fe²⁺][F₂|(Si₂O₇)₂]^14-

• Class: Sorosilicate - Fluoride
• Soluble in: HCl (Gel residue)

• Fe => Mg: Magnesiorowlandite

• Color: Pale gree, Gray
• Tarnish: Brownish red, Waxy luster
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent

• Cleavage: No
• Hardness: 5.5-6.5
• Density: 4.3

• System: Triclinic
• Lattice: a=6.6, b=8.7, c=5.5, α=99.0, β=104.1, γ=91.5