Dissolution and solubility of the calcium-nickel carbonate solid solutions [(Ca1−xNix)CO3] at 25 °C

Table 2 Ni/(Ca + Ni) mol ratio (X_Ni) of calcite-structure, aragonite-structure and amorphous solid phases in the (Ca_1−xNi_x)CO₃ solid solutions

Sample No	Synthetic solid before dissolution			After dissolution in water
	Synthetic solid before dissolution			N₂-degassed				CO₂-saturated
	Cal	Ara	Am	Bulk	Cal	Ara	Am	Bulk	Cal	Ara	Am
CN-00	0.000			0.000	0.000			0.000	0.000
CN-01	0.078			0.053	0.108	0.022		0.027	0.084	0.007
CN-02	0.130		0.813	0.101	0.142	0.068	0.690	0.037	0.103	0.019
CN-03	0.160		0.747	0.200	0.144	0.096	0.701	0.072	0.188	0.116	0.697
CN-04	0.199		0.739	0.327	0.176	0.128	0.787	0.219	0.238	0.166	0.769
CN-05	0.205		0.840	0.426	0.199	0.131	0.821	0.341	0.219	0.224	0.789
				0.421	0.197	0.134	0.821	0.336	0.228	0.221	0.792
CN-06	0.228		0.802	0.564	0.195	0.127	0.859	0.569	0.212	0.215	0.814
CN-07	0.212		0.776	0.684	0.178	0.166	0.894	0.686	0.184	0.124	0.886
CN-08	0.208		0.816	0.838		0.223	0.968	0.863		0.080	0.940
CN-09			0.918	0.964		0.197	0.975	0.983			0.980
CN-10			1.000	1.000			1.000	1.000			1.000

Cal Calcite-structure phase, Ara Aragonite-structure phase, Am Amorphous phase
X_Ni of the bulk component was calculated after the chemical analysis; X_Ni of the Cal, Ara and Am solid phase was calculated after the EDS analysis

ISSN: 1467-4866