cassiterite

/kuh-sit-uh-rahyt/US // kəˈsɪt əˌraɪt //UK // (kəˈsɪtəˌraɪt) //

锡石,锡铁矿,锡锡石,锡锡矿

Definitions

n.名词 noun

1
- : a brown or black mineral, tin dioxide, SnO2, that crystallizes in the tetragonal system; tinstone: the principal ore of tin.

Cassiterite, the principal tin ore, would have to be roasted.
Those minerals which have a specific gravity approaching that of the cassiterite are not completely removed.
In certain exceptional cases this may contain some unaltered cassiterite, which is easily recognised by its appearance.
Two grams of a mixture of silica and cassiterite left, after reduction in hydrogen, 1.78 grams.
The crystals occurred in association with topaz, fluorspar and cassiterite; but they were mostly of rather pale colour.