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单词 scapolite group
释义

scapolite group

noun

: a group of minerals crystallizing in the dipyramidal class of the tetragonal system, being white or grayish white in color when pure, and consisting essentially of silicates of aluminum, calcium, and sodium (hardness 5–6.5, specific gravity 2.5–2.8)
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更新时间:2024/9/22 19:40:13