Calcium molybdate

Structural formula
	__ Ca __ Mon __ O
Crystal system	tetragonal
Space group	I 4 1 / a (No. 88)
Lattice parameters	a = 5.198 (69) Å, c = 11.458 (41) Å
General
Surname	Calcium molybdate
Molecular formula	CaMoO 4
Brief description	white, odorless solid
External identifiers / databases
EC number	232-192-9
ECHA InfoCard	100.029.266
PubChem	24620
ChemSpider	23022
Wikidata	Q4300386
properties
Molar mass	200.02 g mol −1
Physical state	firmly
density	4.45 g cm −3
Melting point	965 ° C
solubility	practically insoluble in water
Refractive index	1.93
safety instructions
GHS labeling of hazardous substances	no GHS pictograms
	no GHS pictograms
H and P phrases	H: no H-phrases
	P: no P-phrases
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Calcium molybdate is the salt of the element calcium with molybdic acid . In nature, the compound occurs in the form of the mineral powellite . The compound crystallizes in the space group I 4 ₁ / a (space group no. 88) with the lattice constants a = 5.198 (69) Å and c = 11.458 (41) Å Template: room group / 88

The substance can be used for the gravimetric analysis of the calcium content by means of precipitation as calcium molybdate. After exposure to short-wave UV radiation , the compound shows green luminescence ; after exposure to lower-energy UV radiation, orange luminescence is observed. Both effects are attributed to transitions in the molybdate anion ; the possible application of calcium molybdate in lasers was the subject of research in 2008.

Individual evidence

↑ ^a ^b Jin-Gyu Kim, Joo-Hyoung Choi, Jong-Man Jeong, Young-Min Kim, Il-Hwan Suh, Jong-Pil Kim, Youn-Joong Ki: Electron Crystallography of CaMoO4 Using High Voltage Electron Microscopy . In: Bull. Korean Chem. Soc. March 2007, doi : 10.5012 / bkcs.2007.28.3.391 .
↑ ^a ^b ^c ^d ^e Entry on calcium molybdate in the GESTIS substance database of the IFA , accessed on September 16, 2019 (JavaScript required)
↑ TT Basiev, PG Zverev, A. Ya. Karasik, VV Osiko, AA Sobol, DS Chunaev: Picosecond Stimulated Raman Scattering in Crystals . In: J. Exp. Theor. Phys. tape 99 , no. 5 , 2004, p. 934-941 , doi : 10.1134 / 1.1842874 .
↑ Entry on Scheelite. In: Römpp Online . Georg Thieme Verlag, accessed on September 16, 2019.
↑ A. Ievinš, Y. Grinšteins: To determine the calcium as molybdate . In: Z. Anal. Chem. Band 127 , no. 1 , December 1944, p. 20-35 , doi : 10.1007 / BF01319952 .
↑ YES Groenink, C. Hakfoort, G. Blass: The Luminescence of calcium molybdates . In: phys. Stat. sol. a . tape 54 , no. 1 , July 1979, p. 329-336 , doi : 10.1002 / pssa.2210540141 .
^ Vale ́ria M. Longo, Alberthmeiry T. de Figueiredo, Adaci B. Campos, Jose WM Espinosa, Antonio C. Hernandes, CA Taft, Julio R. Sambrano, José A. Varela, Elson Longo: Different Origins of Green-Light Photoluminescence Issue in Structurally Ordered and Disordered Powders of Calcium Molybdate . In: J. Phys. Chem. A . tape 112 , no. 38 , July 2008, p. 8920-8928 , doi : 10.1021 / jp801587w ( nanotecnologia.com.br [PDF; 1,2 MB ]).

[Kristallstruktur-1] Jin-Gyu Kim, Joo-Hyoung Choi, Jong-Man Jeong, Young-Min Kim, Il-Hwan Suh, Jong-Pil Kim, Youn-Joong Ki: Electron Crystallography of CaMoO4 Using High Voltage Electron Microscopy . In: Bull. Korean Chem. Soc. March 2007, doi : 10.5012 / bkcs.2007.28.3.391 .

[GESTIS-2] Entry on calcium molybdate in the GESTIS substance database of the IFA , accessed on September 16, 2019 (JavaScript required)

[3] TT Basiev, PG Zverev, A. Ya. Karasik, VV Osiko, AA Sobol, DS Chunaev: Picosecond Stimulated Raman Scattering in Crystals . In: J. Exp. Theor. Phys. tape 99 , no. 5 , 2004, p. 934-941 , doi : 10.1134 / 1.1842874 .

[Römpp-4] Entry on Scheelite. In: Römpp Online . Georg Thieme Verlag, accessed on September 16, 2019.

[5] A. Ievinš, Y. Grinšteins: To determine the calcium as molybdate . In: Z. Anal. Chem. Band 127 , no. 1 , December 1944, p. 20-35 , doi : 10.1007 / BF01319952 .

[6] YES Groenink, C. Hakfoort, G. Blass: The Luminescence of calcium molybdates . In: phys. Stat. sol. a . tape 54 , no. 1 , July 1979, p. 329-336 , doi : 10.1002 / pssa.2210540141 .

[7] Vale ́ria M. Longo, Alberthmeiry T. de Figueiredo, Adaci B. Campos, Jose WM Espinosa, Antonio C. Hernandes, CA Taft, Julio R. Sambrano, José A. Varela, Elson Longo: Different Origins of Green-Light Photoluminescence Issue in Structurally Ordered and Disordered Powders of Calcium Molybdate . In: J. Phys. Chem. A . tape 112 , no. 38 , July 2008, p. 8920-8928 , doi : 10.1021 / jp801587w ( nanotecnologia.com.br [PDF; 1,2 MB ]).