Pb9As4S15
Pb$_9$As$_4$S$_{15}$
This sample of gratonite is displayed in the Smithsonian Museum of Natural History. Gratonite is a sulfide mineral of lead and arsenic with the composition Pb9As4S15 . The sample at left is about 3x5 cm and is from Cerro de Pasco, Junin, Peru.
这种格龙石样品陈列在史密森尼自然历史博物馆中。格龙石是一种含铅和砷的硫化物矿物,其化学式为Pb₉As₄S₁₅。左上方的样品尺寸约为3x5厘米,来自秘鲁境内的帕斯科山(Cerro de Pasco,Junin)。
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