SOLID SOLUTIONS. MIXED CRYSTALS 175
General, 175. Solution of gases in solids, 176. Palladium
and hydrogen, 178. Solutions of solids in solids. Mixed
crystals, 180. Formation of mixed crystals of isomorphous
substances, 182. I. The two components can form an unbroken
series of mixed crystals. (_a_) _The freezing points of all mixtures
lie between the freezing points of the pure components._ Examples,
183. Melting-point curve, 183. (_b_) _The freezing-point curve passes
through a maximum._ Example, 186. (_c_) _The freezing-point
curve passes through a minimum._ Example, 188. Fractional
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crystallization of mixed crystals, 188. II. The two components
do not form a continuous series of mixed crystals. (_a_) _The
freezing-point curve exhibits a transition point_, 190. Example,
190. (_b_) _The freezing-point curve exhibits a eutectic point_, 191.
Examples, 192. Changes in mixed crystals with the temperature,
192.