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The crystal structure of CaZr(PO 4 ) 2 has been revised by ab initio Rietveld analysis of X-ray powder diffraction data. At room temperature, CaZr(PO 4 ) 2 crystallizes in the orthorhombic space group Pna2 1 (Z = 4). Differential thermal analysis suggests a reversible second order transition at 1000 °C confirmed by high temperature XRD analysis that brings out...
Ultra-low thermal expansion ceramics based upon CaZr 4 (PO 4 ) 6 -Li 2 O system were synthesized through solid state sintering. Lithium oxide was introduced to the CaZr 4 (PO 4 ) 6 lattice to promote liquid phase sintering to form CaZr 4 (PO 4 ) 6 with strongly negative thermal expansion. A small addition of Li 2 ...
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