Kobalta(II) fosfāts

Kobalta(II) fosfāts
	; Kobalta(II) fosfāta kristālrežģis; ; Kobalta(II) fosfāts
CAS numurs	13455-36-2
Ķīmiskā formula	Co3(PO4)2
Molmasa	366,74231 g/mol
Blīvums	3810 kg/m3
Kušanas temperatūra	1160°C
Šķīdība ūdenī	nešķīst

Kobalta(II) fosfāts ir neorganiskais savienojums ar formulu Co₃(PO₄)₂. Tas ir komerciālais neorganiskais pigments, kas pazīstams kā kobalta violetais.^[1] Plānas šī materiāla kārtiņas ir ūdens oksidēšanās katalizatori.^[2]

Sagatavošana un struktūra

Tetrahidrātu Co₃(PO₄)₂•4H₂O var izgulsnēt, sajaucot kobalta(II) un fosfātu sāļu ūdens šķīdumus.^[3]^[4] Karsējot tetrahidrāts pārvēršas par bezūdens savienojumu. Saskaņā ar rentgendifraktometrijas datiem bezūdens Co₃(PO₄)₂ sastāv no diskrēta fosfāta (PO₄^3-) anjona, kas saistīts ar Co²⁺ centriem. Kobalta joni proporcijā 1:2 aizņem gan oktaedriskas (sešu koordinātu), gan pentakoordinātu vietas.^[5]^[6]

Atsauces

↑ Hugo Müller, Wolfgang Müller, Manfred Wehner, Heike Liewald "Artists' Colors" in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim. doi:10.1002/14356007.a03_143.pub2
↑ Matthew W. Kanan; Yogesh Surendranatha; Daniel G. Nocera (2009). "Cobalt–phosphate oxygen-evolving Compound". Chem. Soc. Rev. 38 (1): 109–114. doi:10.1039/B802885K. PMID 19088970.
↑ John Dallas Donaldson, Detmar Beyersmann. «Cobalt and Cobalt Compounds». Ullmann's Encyclopedia of Industrial Chemistry, 2005. ISBN 9783527303854. doi:10.1002/14356007.a07_281.pub2.
↑ Sankar, Selvasundarasekar Sam; Rathishkumar, Arumugam; Geetha, Kathiresan; Kundu, Subrata (2020-10-15). "A Simple Route for the Synthesis of Cobalt Phosphate Nanoparticles for Electrocatalytic Water Oxidation in Alkaline Medium". Energy & Fuels 34 (10): 12891–12899. doi:10.1021/acs.energyfuels.0c02809. ISSN 0887-0624.
↑ Anderson, J. B.; Kostiner, E.; Miller, M. C.; Rea, J. R. (1975). "Crystal structure of cobalt orthophosphate Co₃(PO₄)₂". Journal of Solid State Chemistry 14 (4): 372–377. Bibcode 1975JSSCh..14..372A. doi:10.1016/0022-4596(75)90058-4.
↑ Nord, A. G.; Stefanidis, T. (1983). "Structure refinements of Co₃(PO₄)₂. A Note on the Reliability of Powder Diffraction Studies". Acta Chemica Scandinavica A 37: 715–721. doi:10.3891/acta.chem.scand.37a-0715.

[Ullmann-1] Hugo Müller, Wolfgang Müller, Manfred Wehner, Heike Liewald "Artists' Colors" in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim. doi:10.1002/14356007.a03_143.pub2

[2] Matthew W. Kanan; Yogesh Surendranatha; Daniel G. Nocera (2009). "Cobalt–phosphate oxygen-evolving Compound". Chem. Soc. Rev. 38 (1): 109–114. doi:10.1039/B802885K. PMID 19088970.

[3] John Dallas Donaldson, Detmar Beyersmann. «Cobalt and Cobalt Compounds». Ullmann's Encyclopedia of Industrial Chemistry, 2005. ISBN 9783527303854. doi:10.1002/14356007.a07_281.pub2.

[4] Sankar, Selvasundarasekar Sam; Rathishkumar, Arumugam; Geetha, Kathiresan; Kundu, Subrata (2020-10-15). "A Simple Route for the Synthesis of Cobalt Phosphate Nanoparticles for Electrocatalytic Water Oxidation in Alkaline Medium". Energy & Fuels 34 (10): 12891–12899. doi:10.1021/acs.energyfuels.0c02809. ISSN 0887-0624.

[5] Anderson, J. B.; Kostiner, E.; Miller, M. C.; Rea, J. R. (1975). "Crystal structure of cobalt orthophosphate Co₃(PO₄)₂". Journal of Solid State Chemistry 14 (4): 372–377. Bibcode 1975JSSCh..14..372A. doi:10.1016/0022-4596(75)90058-4.

[6] Nord, A. G.; Stefanidis, T. (1983). "Structure refinements of Co₃(PO₄)₂. A Note on the Reliability of Powder Diffraction Studies". Acta Chemica Scandinavica A 37: 715–721. doi:10.3891/acta.chem.scand.37a-0715.

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