ISOMORPHISM (grech, isos equal, identical + m orphe an image, a form) — ability of the substances similar on chemical composition i.e. having similar chemical formulas to form crystals, identical or close in a form.
It was established that in a basis And. ability of the ions, atoms and radicals which are a part of isomorphic substances to replace each other in crystals lies. The particles replacing each other relatives in size have volumes and identical type of chemical communication in a crystal lattice. With the phenomenon And. substitution of calcium in a bone tissue radioactive is connected strontium (see).
See also Crystallization .
Bibliography: Boky G. B. Crystal chemistry, M., 1971, bibliogr.; Shemyakin F. M., Karpov A. N. and Brusentsov A. N. Analytical chemistry, M., 1973, bibliogr.