6. Comparison of the thermal behavior of BaCsP3O9.2H2O with BaNH4P3O9.2H2O and BaTlP3O9.2H2O

The thermal behavior of BaNH4P3O9.2H2O and BaTlP3O9.2H2O [16] was studied (Laboratory of Physical Chemistry of Materials, Ben M'sik faculty of Sciences, Casablanca, Morocco). It would be useful to compare the thermal behavior of BaCsP3O9.2H2O with that of its isotypic compounds BaNH4P3O9.2H2O and BaTlP3O9.2H2O.

Author details

Soufiane Zerraf<sup>1</sup>

Morocco

References

Hicham Moutaabbid<sup>3</sup>

\*, Mustafa Belhabra<sup>1</sup>

Universities—UPMC University Paris, Cedex, France

Bd Bir Anzarane Casablanca, Morocco

mjc.2.4.2013.22.05.12

0025-5408(77)90083-6

ISBN 978-1-4757-9894-4

10426507.2010.520173

10.1021/ja 00457a004

DOI: 10.1016/0584-8539(87)80114-9

192:1286-1293. DOI: 10.1080/10426507.2017.1333507

4596(83)90128-7

\*Address all correspondence to: soufiane.zerraf@gmail.com

, Aziz Kheireddine<sup>1</sup>

, Mohammed Moutaabbid<sup>1</sup> and Said Belaaouad<sup>1</sup>

1 Laboratory of Physical Chemistry of Materials, Ben M'sik Faculty of Sciences, Casablanca,

3 Institute of Mineralogy, Physics of Materials, and Cosmochemistry (IMPMC) Sorbonne

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2 Regional Center for Education and Training Occupations Casablanca Anfa,

, Malika Tridane1,2,

http://dx.doi.org/10.5772/intechopen.81118

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Vibrational Study and Crystal Structure of Barium Cesium Cyclotriphosphate Dihydrate

The thermal behavior of BaCsP3O9.2H2O is different from that obtained in the case of BaTlP3O9.2H2O [16], which leads to the anhydrous barium and thallium BaTlP3O9 cyclotriphosphate at 280�C. After amorphous X-ray state, BaTlP3O9 remains stable till its melting point at 670�C.

$$\text{BaTIP}\_3\text{O}\_9.2\text{H}\_2\text{O} \xrightarrow{70-270^\circ \text{C}} \text{Amorphous X} - \text{ray Phase} + 2\text{H}\_2\text{O} \xrightarrow{300^\circ \text{C}} \text{BaTIP}\_3\text{O}\_9$$

The total dehydration of BaCsP3O9.2H2O, after passing through an amorphous X-ray state, leads to monobarium polyphosphate and tetracerium BaCs4(PO3)6 at 500�C [17, 18].

$$\begin{aligned} \left[Ba\text{C}sP\_3O\_9, 2H\_2O \xrightarrow{100-250^\circ \text{C}} Amorphous \text{X} -ray \text{ Phase} + 2H\_2O \xrightarrow{450^\circ \text{C}} \forall \text{BaCs}\_4(PO\_3)\_6 \text{ crystallized} \right] \\ + \left[4i \left[Ba(PO\_3)\_2\right] \text{e} (BaP\_2O\_6a amorphous \text{ in X} - ray \text{ diffraction})\right] \end{aligned}$$
