K. Petrov et al., PREPARATION AND CRYSTAL-STRUCTURE OF THE AMMONIUM COBALT CARBONATE HYDROXIDE HYDRATE (NH4)(2)CO-8(CO3)(6)(OH)(6)CENTER-DOT-4H(2)O, Solid state ionics, 92(3-4), 1996, pp. 303-308
(NH4)(2)Co-8(CO3)(6)(OH)(6) . 4H(2)O was prepared by digesting Co-2(OH
)(2)CO3 . xH(2)O in water solution of NH4HCO3. Chemical analyses, diff
use reflectance spectroscopy and XRD data proved that this compound, l
ike Na2Co8(CO3)(6)(OH)(6) . 6H(2)O and K2Co8(CO3)(6)(OH)(6) . 4H(2)O,
is a derivative of the kambaldaite Na2Ni8(CO3)(6)(OH)(6) . 6H(2)O, a m
ineral with an unique channel structure which had no other synthetic o
r natural analogues.