Download Crystal Chemistry of Condensed Phosphates by A. Durif PDF

By A. Durif

In this reference, the writer completely stories the present nation of condensed phosphate chemistry. a special characteristic of this quantity is an exam of the new advancements in X-ray structural ideas, reporting on basic effects received via their use. more desirable via finished tables reporting crystal information, chapters determine and signify greater than 2,000 compounds. extra positive factors comprise a concise survey of the ancient improvement of condensed phosphate chemistry; the almost immediately accredited class method; a evaluation of every kinfolk of condensed phosphates and lots more and plenty more.

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By A. Durif

In this reference, the writer completely stories the present nation of condensed phosphate chemistry. a special characteristic of this quantity is an exam of the new advancements in X-ray structural ideas, reporting on basic effects received via their use. more desirable via finished tables reporting crystal information, chapters determine and signify greater than 2,000 compounds. extra positive factors comprise a concise survey of the ancient improvement of condensed phosphate chemistry; the almost immediately accredited class method; a evaluation of every kinfolk of condensed phosphates and lots more and plenty more.

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Two crystalline forms of this salt were obtained by Frazier et al. 183 by adding MgO to aqueous solutions of ammonium diphosphate under various conditions. Both forms are not water-soluble. Mg(NH 4)s(P 20 7h·6H 20 and Mg(NH 4 bH 4(P 20 7h-2H 20. The same authors also described these two insoluble diphosphates. The first one is isotypic with the corresponding Mn, and Fe(II) derivatives whereas the second is isotypic with the zinc compound. (ii) Calcium-Sodium Salts CaNa 2 P20 7 and CaNa 2 P20 7-4H 20.

93 NaK 3 P20T4H 20. The chemical preparation and crystal structure of NaK 3P 20T4H 20 have been reported by Dumas et a/. 94 Solubility studies on the system NHrK 20-H3P0 4-H 4PzOr H20 at 298 K by Frazier et at. 2. 1. 63 P31? G. 02 These three diphosphates were later, clearly characterized by Waerstad and Frazier, 96 who reported the unit cells and main crystallographic features for these three species. From the crystal data given for the second of these salts, Averbuch-Pouchot and DuriF 2 showed it to be isotypic with Rb2H 2P 207" 1/2H 20.

This salt was prepared by Frazier et al. 183 by the addition of MnS0 4 to an aqueous solution of NH4 polyphosphate having a pH in the range 4-8. This diphosphate is not water-soluble. The corresponding Fe(II) salt is isotypic. MnNa 2P20 7·4H 20, MnK 2P20 7·3H 20, MnRb 2P207"3H 20 and MnHNH 4 P207"H 20. These salts were characterized by Goloshchapov and Martynenko 193 during the study of various MnClz-M 4P 20rH 20 systems at 298 K. The rubidium salt was also reported by these authors. 194 (vii) Iron Salts Fe(NH 4 hP207"2H 20 and Fe(NH 4)6(P20 7h·6H 20.

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