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A new compound of the Rb1.5(NH4)0.5{Cu(P2O7)} composition, obtained by the high-temperature reaction method from a mixture of RbNO3, Cu(NO3)2, and (NH4)4P2O7, has been studied using X-ray diffraction. This compound is crystallized in the orthorhombic system, sp. gr. Pnma, a = 15.146(3) Å, b = 5.183(1) Å, c = 10.096(2) Å, V = 792.6(3) Å3. The structure has been interpreted and refined to the final...
The crystal structure of bonshtedtite, Na3Fe(PO4)(CO3) (monoclinic, P21/m, a = 5.137(4), b = 6.644(4), c = 8.908(6) Å, β = 90.554(14)°, V = 304.0(4) Å3, Z = 2) has been refined to R1 = 0.041 on the basis of 1314 unique reflections. The structure is similar to that of other minerals of the bradleyite group. It is based on the [Fe(PO4)(CO3)]3− layers oriented parallel to (001). The layers are formed...
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