ACETAMIDINIUMHEXAFLUOROMETALLATES OF ALUM INUM, GALLIUM, INDIUM, VANADIUM, CHROMIUM, MANGANESE, IRON AND COBALT

The title compounds were crystallized from HF-containing aqueous solut ions of their hexafluorometallate acids by adding acetamidine. Their u nit cells were determined and the thermal decomposition was investigat ed thermoanalytically. The crystal structure of [CH3C(NH2)2]3AlF6 was determined: Space group P4(1)2(1)2/P4(3)2(1)2, a = 8,987(1), c = 17,89 4(3) angstrom, R 0,054. The unit cell parameters: [CH3C(NH2)2]3GaF6: a = 9,078(1), c = 18,104(2) angstrom; [CH3C(NH2)2]3InF6: a = 9,277(1), c = 18,545(2) angstrom; [CH3C(NH2)2]3VF6: a = 9,1201(6), c = 18,2197(6 ) angstrom; [CH3C(NH2)2]3CrF6: a = 9,089(1), c = 18,132(2) angstrom; [ CH3C(NH2)2]3MnF6: a = 9,109(2), c = 18,241(3) angstrom; [CH3C(NH2)2]3F eF6: a = 9,122(2), c = 18,189(6) angstrom; [CH3C(NH2)2]3CoF6: a = 9,08 4(1), c = 18,130(4) angstrom.