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Silicate

Ardennite-(As)

Mn²⁺₄Al₄(AlMg)(AsO₄)(SiO₄)₂(Si₃O₁₀)(OH)₆
Crystal systemOrthorhombic
ClassSilicate
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Ardennite-(As) specimen

Ardennite-(As) Locality: Salm-Château, Vielsalm , Stavelot Massif , Luxembourg Province, Belgium ( Locality at mindat.org ) Size: 3.5 x 2.5 x 1.5 cm. Ardennite-(As) is a rare silicate named for the Type Locality in the Ardennes Mountains of Belgium. This extremely rich and showy specimen is covered with sparkly, brown ardennite-(As) microcrystals to 3 mm on a quartz-rich matrix and is from the Type Locality. Ex. George Elling Collection. — Photo: Robert M. Lavinsky · CC BY-SA 3.0

Ardennite-(As)

Ardennite-(As) is an IMA-recognized mineral species in the silicate class, with the chemical formula Mn²⁺₄Al₄(AlMg)(AsO₄)(SiO₄)₂(Si₃O₁₀)(OH)₆.

It crystallizes in the orthorhombic crystal system (space group Pnmm). It is a member of the Ardennite structural group.

IMA symbol Ard-As, IMA status: approved, named in 1872.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more A minerals or help write this entry.