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This sample of ardennite is displayed in the Smithsonian Museum of Natural History. Ardennite is a silicate of magnesium and manganese. It also contains arsenic with the composition Mg1+xMn4Al5-x(AsO4)(SiO4)2(Si3O10)(OH)6. The sample at left is about 8 cm across and is from Ottre, Ardennes, Belgium.
这个ardennite样本陈列在史密森尼自然历史博物馆中。ardennite是一种含镁和锰的硅酸盐,其成分还包括砷,化学式为Mg<sub>1+x</sub>Mn<sub>4</sub>Al<sub>5-x</sub>(AsO<sub>4</sub>)(SiO<sub>4</sub>)<sub>2</sub>(Si<sub>3</sub>O<sub>10</sub>)(OH)<sub>6</sub>。左图中的样本宽约8厘米,来自比利时阿登地区的Ottre。
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