isomorphous

[ahy-suh-mawr-fuh s] /ˌaɪ səˈmɔr fəs/
adjective, Chemistry, Crystallography
1.
(of a compound or mineral) capable of crystallizing in a form similar to that of another compound or mineral, used especially of substances so closely related that they form end members of a series of solid solutions.
Origin
1820-30; iso- + -morphous
British Dictionary definitions for isomorphous

isomorphic

/ˌaɪsəʊˈmɔːfɪk/
adjective
1.
exhibiting isomorphism