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New polymorph of CaHPO4 (monetite): synthesis and crystal structure

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Abstract

A novel form of anhydrous dicalcium phosphate CaHPO4 (monetite) is synthesized hydrothermally and characterized by single crystal X-ray diffraction. It crystallizes in the orthorhombic space group Ccm21 with a = 6.242(1) Å, b = 6.994(2) Å, c = 7.003(3) Å, V = 305.73(16) Å3 and it has four independent unit formulas in the unit cell (Z = 4). A three-dimensional crystal structure can be described by {HPO4} n infinite zigzag chains linked by Ca–O bonds. The comparison to the crystal structures of other polymorphs is given.

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Authors and Affiliations

  1. Laboratoire de Matériaux et Cristallochimie, Faculté des Sciences de Tunis, Université de Tunis El Manar, Tunis, Tunisia

    N. Ouerfelli & M. F. Zid

  2. Université de Tunis Carthage, Institue Préparatoire aux Etudes d’Ingénieur de Bizerte, Zarzouna (Bizerte), Tunisia

    N. Ouerfelli

Authors
  1. N. Ouerfelli
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  2. M. F. Zid
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Correspondence to N. Ouerfelli.

Additional information

The text was submitted by the authors in English. Zhurnal Strukturnoi Khimii, Vol. 57, No. 3, pp. 658-661, March-April, 2016.

Original Russian Text © 2016 N. Ouerfelli, M. F. Zid.

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Ouerfelli, N., Zid, M.F. New polymorph of CaHPO4 (monetite): synthesis and crystal structure. J Struct Chem 57, 628–631 (2016). https://doi.org/10.1134/S0022476616030252

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  • DOI: https://doi.org/10.1134/S0022476616030252

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