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magnesia alum

A monoclinic mineral, MgAl2(SO4)4.22H2O ; hallotrichite group; forms acicular crystals and tufts; astringent taste; a product of surficial acid sulfate attack on aluminous rocks in mines and arid regions.

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  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 分数
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