Abstract
The crystal structures of kimuraite-(Y) [Y2Ca(CO3)4•6H2O: orthorhombic, I2cb, a = 9.2673(7), b = 24.0435(2), c = 6.0537(2) Å, V = 1348.88(11) Å3, Z = 4] and lokkaite-(Y) [Y4Ca(CO3)7•9H2O: orthorhombic, C2mb, a = 9.23346(18), b = 39.2328(7), c = 6.11166(11) Å, V = 2213.97(7) Å3, Z = 4] were solved and refined with single crystal XRD data to R = 0.0492 for 1215 and 0.0887 for 2144 reflections, respectively.