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Table 2 The unit cell parameters for whitlockite- and apatite-related complex substituted calcium phosphates obtained at 700 °C

From: Immobilization of cesium from aqueous solution using nanoparticles of synthetic calcium phosphates

Samples index M Molar ratio CO32−/PO43− in initial solution Crystal system a, Å c, Å
I Na 0 Trigonal 10.430(8) 37.358(2)
II 1 Hexagonal 9.395(8) 6.901(5)
III K 0 Trigonal 10.430(2) 37.391(2)
IV 1 Hexagonal 9.399(4) 6.890(1)