. Inorganic chemistry . Fig. Fig. 69. Crystallisation and Crystallography. 327 1153. To the square prismatic system belong tinstone andferrocyanide of potassium. To the right prismatic system—sulphur, iodine, sulphate of potassium. To the oblique prismatic—carbonate and phosphate of sodium, borax, green vitriol. Tothe doubly-oblique prismatic system—sulphate of copper. Tothe rhombohedral system—calcareous spar, quartz, ice, arsenic,antimony. 1154. Some bodies present an exception to the otherwisegeneral law, that the crystals of one. substance belong all to asingle crystallographic system
. Inorganic chemistry . Fig. Fig. 69. Crystallisation and Crystallography. 327 1153. To the square prismatic system belong tinstone andferrocyanide of potassium. To the right prismatic system—sulphur, iodine, sulphate of potassium. To the oblique prismatic—carbonate and phosphate of sodium, borax, green vitriol. Tothe doubly-oblique prismatic system—sulphate of copper. Tothe rhombohedral system—calcareous spar, quartz, ice, arsenic,antimony. 1154. Some bodies present an exception to the otherwisegeneral law, that the crystals of one. substance belong all to asingle crystallographic system. Thus carbon, as the diamond, isa regular octohedron, and a member, therefore, of the regularsystem; as graphite or plumbago, it is a six-sided prism, whichbelongs to the rhombohedral system. 1155. Sulphur, in like manner, crystallises when melted, ina shape belonging to the oM]^^^prismatic system; when dissolved,in a shape belonging to the right prismatic system. 1156. Sulphur; carbon, and the other bodies which prese
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