Sentence Examples

  • By heating a mixture of cobalt oxalate and sal-ammoniac in air, it is obtained in the form of minute hard octahedra, which are not magnetic, and are only soluble in concentrated sulphuric acid.
  • This solution, on standing, deposits octahedra of the composition CoC1 2.6NH 3.
  • It forms grey coloured octahedra of specific gravity 5.49 6 at 20° C., melting at 900° C.; it burns at a red heat, is insoluble in hydrochloric acid, but dissolves in aqua regia, and is also soluble in molten alkalis.
  • Many of them contain large octahedra of magnetite.
  • It crystallizes in octahedra isomorphous with stannic oxide.

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