scapolite group


Definition of scapolite group

  1. :  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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a rounded knoll or a ridge of ice

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