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KB Term:
Sigma KEE - Barite
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重晶石
Barite
is Barium Sulfate occurring as a mineral.
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复合物质
The
Class
of
Substance
s that contain two or more elements (
ElementalSubstance
s) in definite proportion by weight. The composition of a pure compound will be invariant, regardless of the method of preparation. Compounds are composed of more than one kind of atom (element). The term molecule is often used for the smallest unit of a compound that still retains all of the properties of the compound. Examples: Table salt (sodium chloride, NaCl), sugar (sucrose, C_{12}H_{22}O_{11}), and water (H_2O).
矿物
Any of various naturally occurring homogeneous substances (such as stone, coal, salt, sulfur, sand, petroleum), or synthetic substances having the chemical composition and crystalline form and properties of a naturally occurring mineral.
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