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Ardennite-(V)

Year of discovery: 2005 (Sparone, Italy), 1986 (Japan)

Locality list: 2 localities of ardennite-(V)

• Mn²⁺₄MgAl₅(Si₅V)O₂₂(OH)₆
• (Mn²⁺,Ca,Mg)₄(Al,Mg,Fe³⁺,Mn³⁺)₆Si₅(V,As)O₂₂(OH,O)₆
• [Mn²⁺₄][Al³⁺][Mg²⁺][Al³⁺₄][(OH)₆|VO₄|(SiO₄)₂|Si₃O₁₀]^25-

• Class: Ardennite group
• Class: Sorosilicate - Nesosilicate - Vanadate - Hydroxide

• Mn => Ca: Kannanite

• VO₄ => AsO₄: Ardennite-(As) (Series)

• Color: Yellow
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent

• Habit: Prismatic
• Aggregate: Columnar

• Cleavage: No
• Hardness: 6-7

• System: Orthorhombic
• Group: mmm, Pnmm
• Lattice: a=8.8, b=5.8, c=18.6