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Mechanism of the SiO4 for CO3 substitution in defernite, Ca6(CO3)1.58(Si2O7)0.21(OH)7
Mechanism SiO4 CO3 substitution defernite Ca6(CO3)1.58(Si2O7)0.21(OH)7
2012/4/6
Defernite, Ca6(C03)L5s(Si207)o.21(OHMClo.5o(OH)o.os(H20)od, is a carbonate mineral [space group Pnam; at 100K:a= 17.744(2), b=22.601(4), c =3.633(1) A,Z=4]withzeolite-like structural channels. The str...
Structure and crystal field spectra of Co3Al2(SiO4)3 and (Mg, Ni)3Al2(SiO4)3 garnet
Structure crystal field spectra Co3Al2(SiO4)3 (Mg, Ni)3Al2(SiO4)3 garnet
2012/4/5
Synthetic C03A12(Si04)3garnet and (Mg,Ni)3A12(Si04)3 garnet with Ni/(Ni + Mg)= 0.15-0.18 have been studied by single-crystal X-ray diffraction and optical spectroscopy. The X-ray data confirm that COH...