Sentence Examples


  • The artificial preparation of minerals, especially of apatite and isomorphous minerals and of crystalline oxides, was another subject in which he made many experiments.
  • - Those varieties of native calcium phosphate which are not distinctly crystallized, like apatite, but occur in fibrous, compact or earthy masses, often nodular, and more or less impure, are included under the general term phosphorite.
  • The ultimate source of these mineral phosphates may be referred in most cases to the apatite widely distributed in crystalline rocks.
  • The first mode of occurrence is of little significance practically, for the crystalline rocks generally contain too little phosphate to be valuable, though occasionally an igneous rock may contain enough apatite to form an inferior fertilizing agent, e.g.
  • Another group of phosphatic deposits connected with igneous rocks comprises the apatite veins of south Norway, Ottawa and other districts in Canada.

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