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The alpha phase of zirconium phosphate is under the P21/n space group, with cell dimensions of a = 9.060 Å, b = 5.297 Å, c = 15.414 Å, α = γ = 90°, β = 101.71° and Z = 4.21 The basal interlayer distance for the α-Zirconium phosphate is 7.6 Å, where 6.6 Å is the layer thickness and the remaining 1 Å space is occupied by the ...
R = 13.9·P 1/6 ·exp(−1.47/k B T) The oxidation rate R is here expressed in gram/(cm 2 ·second); P is the pressure in atmosphere, that is the factor P 1/6 = 1 at ambient pressure; the activation energy is 1.47 eV; k B is the Boltzmann constant (8.617 × 10 −5 eV/K) and T is the absolute temperature in kelvins.
Kosnarite is an alkali zirconium phosphate mineral (KZr 2 (PO 4) 3) named after an expert of pegmatites Richard A. Kosnar. [2] Kosnarite contains potassium, oxygen, phosphorus, and zirconium with sodium, rubidium, hafnium, manganese and fluorine (Na, Rb, Hf, Mn, and F) being common impurities found in kosnarite.
The main steps are summarized in the following equation: [6] 3 ⁄ 4 Li 2 CO 3 + 3 ⁄ 2 GeO 2 + 3 NH 4 H 2 PO 4 + 1 ⁄ 4 Al 2 O 3 → Li 1.5 Al 0.5 Ge 1.5 (PO 4) 3 + 3 NH 3 + 3 ⁄ 4 CO 2 + 9 ⁄ 2 H 2 O. The annealing temperature is selected to promote the full crystallization and avoiding the formation of detrimental secondary phases, pores ...
Metallography allows the metallurgist to study the microstructure of metals. A micrograph of bronze revealing a cast dendritic structure Al-Si microstructure. Microstructure is the very small scale structure of a material, defined as the structure of a prepared surface of material as revealed by an optical microscope above 25× magnification. [1]
In water-based pastes for do-it-yourself ceramics and cements. These contain microscopic YSZ milled fibers or sub-micrometer particles, often with potassium silicate and zirconium acetate binders (at mildly acidic pH). The cementation occurs on removal of water. The resulting ceramic material is suitable for very high-temperature applications.
Ionic radius, r ion, is the radius of a monatomic ion in an ionic crystal structure. Although neither atoms nor ions have sharp boundaries, they are treated as if they were hard spheres with radii such that the sum of ionic radii of the cation and anion gives the distance between the ions in a crystal lattice.
Tetrabenzylzirconium is a precursor to many catalysts for olefin polymerization. It can be converted to mixed alkyl, alkoxy, and halide derivatives, Zr(CH 2 C 6 H 5) 3 X (X = CH 3, OC 2 H 5, Cl). Structure of tetrabenzylzirconium with H atoms omitted for clarity. [17] In addition to mixed Cp 2 Zr(CO) 2, zirconium forms the binary carbonyl [Zr ...