ISSN:
1434-4475
Keywords:
Potassium-cyclo-tetraphosphate(V)-dihydrate
;
Crystal structure
;
Dehydration
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The crystal structure of (KPO3)4 · 2H2O was solved by direct methods andFourier-syntheses (triclinic; P $$\bar 1$$ ;a=1 114.9 (2),b=821.9 (2),c=815.7 (3) pm; α=88,88 (2), β=84.51 (2), γ=82.70 (2)°;Z=2; 5910 unique reflections;R=0.052). The cyclic anions exhibit point symmetry S4 with four terminal oxygens in axial and four in equatorial position. Thermal investigations (DTA, TGA, X-Ray-methods) show that the dehydration occurs in two steps. The anhydrous form of (KPO3)4 is stable above 230 °C and undergoes a second order phase transition which is complete at 515±5 °C.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00798455
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