Crystal Chemistry of Condensed Phosphates by A. Durif

By A. Durif

In this reference, the writer completely stories the present nation of condensed phosphate chemistry. a different characteristic of this quantity is an exam of the hot advancements in X-ray structural strategies, reporting on primary effects received via their use. improved by way of finished tables reporting crystal information, chapters establish and symbolize greater than 2,000 compounds. extra gains comprise a concise survey of the historic improvement of condensed phosphate chemistry; the almost immediately authorised class method; a assessment of every kin of condensed phosphates and lots more and plenty more.

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In addition, the two corresponding rubidium salts, PbRb2P20 7 and Pb 3Rb 2 (P 20 7)3 . were characterized and found to be isotypic with the potassium compounds. The existence of PbNa2P20 7 was also reported. A triclinic unit cell was proposed for this last salt, whose melting point has been measured as 1089 K. (xiv) Palladium Salts Pdli 2P 20 7 and PdNa 2P20 7 • These double diphosphates were obtained by Sokolova et al. 215 via solid-phase reactions between PdCl2 and LiH 2P0 4 or NaH 2P0 4. They melt at 1153 and 1113 K, respectively.

In condensed phosphate chemistry, examples of acidic anions are generally very rare, being limited to one or two examples in the class of cyclophosphates and about the same number of long-chain polyphosphates. In contrast, acidic anions are common among the lower oligophosphates, the diphosphates and triphosphates. In diphosphate chemistry, the existence ofHP2ol-, H 2P2ol- and H 3P20 7- groups has been well established for a long time. " We will report in detail the various geometrical configurations of these "macroanions" for the case of diphosphates at the end of this chapter.

Klement 178 described the preparation of the sodium derivative by the action of ZnO on molten NaP0 3. Zn 3K2(P20 7h·3H 20, ZnK2 P20T2H 20, Znl

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