Affinement des structures cristallines de CuK2(PO3)4 et CoK2(PO3)4

Laügt, M.; Tordjman, I.; Bassi, G.; Guitel, J. C.

doi:10.1107/s056774087400433x

Cited by 8 publications

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“…No good results were obtained for the space group C 2∕ c . By comparing crystallographic characteristics of the K 2 Zn(PO 3 ) 4 compound with those presented in the literature, it was found that K 2 Zn(PO 3 ) 4 and K 2 Cu(PO 3 ) 4 (Laügt et al , 1974) have similar formulas and lattice parameters. Therefore, a determination of the structure of K 2 Zn(PO 3 ) 4 was tried by means of isostructural method based on the structure model of K 2 Cu(PO 3 ) 4 with space group C c .…”

Section: Resultsmentioning

confidence: 95%

Crystal structure determination of K₂Zn(PO₃)₄

Chen

et al. 2009

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The crystal structure of K 2 Zn͑PO 3 ͒ 4 was determined and refined using the Rietveld method based on the isostructure model of K 2 Cu͑PO 3 ͒ 4 . This compound belongs to the monoclinic system with space group Cc and lattice parameters of a = 11.0941͑2͒ Å, b = 12.5215͑3͒ Å, c = 7.6597͑2͒ Å, and ␤ = 102.47͑2͒°. The chemical formula unit per unit cell is Z = 4 and the calculated density is 2.938͑3͒ g / cm 3 . Zigzag ͓PO 3 ͔ ϱ chains formed along the a axis, and their period contains eight PO 4 tetrahedrons.

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Section: Resultsmentioning

confidence: 95%

Crystal structure determination of K₂Zn(PO₃)₄

Chen

et al. 2009

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“…The first phase seen in the bibliography is tetraphosphate K 2 Co(PO 3 ) 4 [34]. This material is synthesized by the dry route; it crystallizes in the monoclinic system, with non-centrosymmetric space group "Cc."…”

Section: Polyphosphates With Long Chains [Po 3 ] N N−mentioning

confidence: 99%

Cobalt Phosphates and Applications

Marzouki¹,

Sayed²,

Graia³

et al. 2019

Cobalt Compounds and Applications

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Cobalt phosphates with open framework present various physical performances in relation to their structures. In fact, the development of new materials that could potentially be ionic conductors or ion exchangers led us to examine the CoP -O and A-CoP -O crystallographic systems (A: monovalent cation) and their different methods of synthesis. This work consists first of all in highlighting the crystalline phases of cobalt phosphates. Indeed, many works related to the discovery of some of these materials with interesting properties, in particular ionic conductivity, motivated our research and encouraged us to collect several cobalt phosphates and to correlate structure-physical properties in particular electrical properties.

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“…The total thermal dehydration, under atmospheric pressure, of CoK 4 (P 3 O 9 ) 2 .7H 2 O between 240 and 400 °C leads to the corresponding anhydrous cyclotriphosphate CoK 4 (P 3 O 9 ) 2 . The thermal decomposition of this new anhydrous phase, CoK 4 (P 3 O 9 ) 2 (Abouimrane, 2000), between 500 and 650 °C leads to a mixture of long-chain polyphosphates KPO 3 (Jost and Schulze, 1971) and CoK 2 (PO 3 ) 4 (Laügt et al , 1974). It is worth noting that CoK 4 (P 3 O 9 ) 2 .7H 2 O and its isotypic compound NiK 4 (P 3 O 9 ) 2 .7H 2 O have never been studied, except for the structure which was determined in 1978 (Seethanen et al , 1978).…”

Section: Elaboration and Crystal Datamentioning

confidence: 99%

Chemical preparation and crystal data for two new cyclotriphosphates M^IIK₄(P₃O₉)₂ (M^II=Co²⁺ and Mn²⁺)

Sbai¹,

Tridane²,

Abouimrane³

et al. 2003

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Methods of chemical preparation and crystal data are reported for two new anhydrous cyclotriphosphates MIIK4(P3O9)2 (MII=Co2+ and Mn2+). These anhydrous cyclotriphosphates CoK4(P3O9)2 and MnK4(P3O9)2 were obtained by total dehydration of corresponding hydrated cyclotriphosphates CoK4(P3O9)2.7H2O and MnK4(P3O9)2.2H2O. CoK4(P3O9)2 is triclinic, space group P−1, Z=1 with the following unit-cell dimensions: a=6.29(3) Å, b=8.00(1)Å, c=13.05(8)Å, α=86.03(5)°, β=98.00(1)°, γ=68.11(2)°. MnK4(P3O9)2 crystallizes in the rhombohedral system, space group P−31c, Z=2 with the following unit-cell dimensions: a=b=7.337(3)Å, c=19.920(1)Å.

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Affinement des structures cristallines de CuK₂(PO₃)₄ et CoK₂(PO₃)₄

Cited by 8 publications

References 1 publication

Crystal structure determination of K₂Zn(PO₃)₄

Crystal structure determination of K₂Zn(PO₃)₄

Cobalt Phosphates and Applications

Chemical preparation and crystal data for two new cyclotriphosphates M^IIK₄(P₃O₉)₂ (M^II=Co²⁺ and Mn²⁺)

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Affinement des structures cristallines de CuK2(PO3)4 et CoK2(PO3)4

Cited by 8 publications

References 1 publication

Crystal structure determination of K2Zn(PO3)4

Crystal structure determination of K2Zn(PO3)4

Cobalt Phosphates and Applications

Chemical preparation and crystal data for two new cyclotriphosphates MIIK4(P3O9)2 (MII=Co2+ and Mn2+)

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Affinement des structures cristallines de CuK₂(PO₃)₄ et CoK₂(PO₃)₄

Crystal structure determination of K₂Zn(PO₃)₄

Crystal structure determination of K₂Zn(PO₃)₄

Chemical preparation and crystal data for two new cyclotriphosphates M^IIK₄(P₃O₉)₂ (M^II=Co²⁺ and Mn²⁺)