Titlebook: Crystal Chemistry of Condensed Phosphates; A. Durif Book 1995 Springer Science+Business Media New York 1995 Compound.X-ray.chemistry.class

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The PO4 Tetrahedron in Condensed Phosphates,oxygen atoms are involved in the associated-cation coordination. In some rare cases, O(L) atoms are considered as being shared with an associated cation, but such cases generally involve large cations, whose coordination is never well determined.

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Cyclophosphates,edure for the chemical preparation of an appropriate starting material. We will present for each family of cyclophosphate a short survey of its development and will describe as much detail as possible the specific methods of chemical preparation.

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Mixed-Anion Phosphates,xpected products that could not be identified until their crystal structures had been solved. The main crystallographic data for monophosphate—diphosphates are presented in Table 5.1, and those for mixed-anion phosphates containing anions with higher degrees of condensation are given in Table 5.2.

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項目

Long-Chain Polyphosphates, are considered as having terminal OH groups and thus a formula (H.P.O.). Long-chain polyphosphates have been the subject of a great number of physical investigations, mainly devoted to the estimation of their degree of polymerization. From these studies, which we do not report here, one arrives at

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Mixed-Anion Phosphates,very few of them that have been prepared by classical reactions of aqueous chemistry, such as K.H.(PO.)(P.O.) and K.H.(PO.)2(P.O.), there are no rules for the chemical preparation of these mixed-anion phosphates. The vast majority of them have been obtained in various flux-method experi?ments as une