Calcium carbonate occurs in the allomorphs calcite and aragonite.同质异晶的方解石和文石中含有碳酸钙.And some calcite - secreting organisms also add magnesium to the mix.有些分泌方解石的生物,会在分泌物中加入镁.The chemical composition of the melo shell is c...
The prospectors have discovered such minerals as calcite, quartz and asbestos here.探矿人员在这里发现了方解石 、 石英、石棉等矿藏.At first glance, calcite might be confused with quartz where both are clear, colorless, and " glassy ".乍一看来, 方解石...