Strontium tungstate

Structural formula
General
Surname	Strontium tungstate
other names	Strontium tungsten oxide
Molecular formula	SrWO 4
Brief description	white odorless solid
External identifiers / databases
EC number	236-617-9
ECHA InfoCard	100.033.275
PubChem	123306
Wikidata	Q25387695
properties
Molar mass	335.46 g mol −1
Physical state	firmly
density	6.439 g / cm 3 (25 ° C)
Melting point	1535 ° C
safety instructions
GHS labeling of hazardous substances Caution
H and P phrases	H: 315-319-335
	P: 261-305 + 351 + 338
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Strontium tungstate is an inorganic chemical compound of strontium from the group of tungstates .

Extraction and presentation

Strontium tungstate can be obtained by reacting strontium carbonate with tungsten (VI) oxide at high temperatures.

{\ displaystyle \ mathrm {SrCO_ {3} + WO_ {3} \ longrightarrow SrWO_ {4} + CO_ {2} \ uparrow}}

properties

Strontium tungstate is a white, odorless solid. It has a tetragonal crystal structure of the Scheelite type with the space group I 4 ₁ / a (space group no. 88) . At a pressure of 2.1 GPa it changes into a monoclinic crystal structure of the tungsten type with the space group P 2 / n (space group no. 13, position 2) . At a pressure of around 10 GPa, the compound then changes into a fergusonite-type crystal structure . Template: room group / 88 Template: room group / 13.2

use

Strontium tungstate is used as an electro-optical material e.g. B. used for Raman lasers and light emitting diodes .

Individual evidence

↑ Strontium tungstate data sheet from AlfaAesar, accessed on June 14, 2016 ( PDF )(JavaScript required) .

↑ ^a ^b ^c ^d data sheet Strontium tungsten oxide, powder, −200 mesh, 99.9% trace metals basis from Sigma-Aldrich , accessed on June 14, 2016 ( PDF ).

↑ ^a ^b ^c Jiandong Fan, Huaijin Zhang, Zhengping Wang, Wenwei Ge, Jiyang Wang: Synthesis of polycrystalline materials of SrWO4 and growth of its single crystal. In: Frontiers of Chemistry in China. 1, 2006, p. 264, doi : 10.1007 / s11458-006-0023-z .

↑ ^a ^b E. Yu Tonkov: High Pressure Phase Transformations Handbook 1 . CRC Press, 1992, ISBN 978-2-88124-758-3 , pp. 620 ( limited preview in Google Book search).

↑ MAMA Maurera, AG Souza, LEB Soledade, FM Pontes, E. Longo, ER Leite, JA Varela: Microstructural and optical characterization of CaWO ₄ and SrWO ₄ thin films prepared by a chemical solution method. In: Materials Letters. 58, 2004, p. 727, doi : 10.1016 / j.matlet.2003.07.002 .

↑ D. Errandonea, J. Pellicer-Porres, FJ Manjón, A. Segura, Ch. Ferrer-Roca, RS Kumar, O. Tschauner, P. Rodríguez-Hernández, J. López-Solano, S. Radescu, A. Mujica , A. Muñoz, G. Aquilanti: High-pressure structural study of the scheelite tungstates CaWO ₄ and SrWO ₄ . In: Physical Review B. 72, 2005, doi : 10.1103 / PhysRevB.72.174106 .

^ Xin-Tao Wu, Ling Chen: Structure-Property Relationships in Non-Linear Optical Crystals II The IR Region . Springer, 2012, ISBN 978-3-642-29621-5 , pp. 81 ( limited preview in Google Book search).

↑ Yandong Ren, Yonghao Liu, Rui Yang: A series of color tunable yellow – orange – red-emitting SrWO ₄ : RE (Sm ³⁺ , Eu ³⁺ –Sm ³⁺ ) phosphor for near ultraviolet and blue light-based warm white light emitting diodes. In: Superlattices and Microstructures. 91, 2016, p. 138, doi : 10.1016 / j.spmi.2015.12.026 .

↑ Xiaohua J. Huang: Nanotechnology Research New Nanostructures, Nanotubes and Nanofibers . Nova Publishers, 2008, ISBN 978-1-60021-902-3 , pp. 75 ( limited preview in Google Book search).

[Alfa-1] Strontium tungstate data sheet from AlfaAesar, accessed on June 14, 2016 ( PDF )(JavaScript required) .

[Sigma-2] ta sheet Strontium tungsten oxide, powder, −200 mesh, 99.9% trace metals basis from Sigma-Aldrich , accessed on June 14, 2016 ( PDF ).

[DOI10.1007/s11458-006-0023-z-3] Jiandong Fan, Huaijin Zhang, Zhengping Wang, Wenwei Ge, Jiyang Wang: Synthesis of polycrystalline materials of SrWO4 and growth of its single crystal. In: Frontiers of Chemistry in China. 1, 2006, p. 264, doi : 10.1007 / s11458-006-0023-z .

[E._Yu_Tonkov-4] E. Yu Tonkov: High Pressure Phase Transformations Handbook 1 . CRC Press, 1992, ISBN 978-2-88124-758-3 , pp. 620 ( limited preview in Google Book search).

[DOI10.1016/j.matlet.2003.07.002-5] MAMA Maurera, AG Souza, LEB Soledade, FM Pontes, E. Longo, ER Leite, JA Varela: Microstructural and optical characterization of CaWO ₄ and SrWO ₄ thin films prepared by a chemical solution method. In: Materials Letters. 58, 2004, p. 727, doi : 10.1016 / j.matlet.2003.07.002 .

[DOI10.1103/PhysRevB.72.174106-6] D. Errandonea, J. Pellicer-Porres, FJ Manjón, A. Segura, Ch. Ferrer-Roca, RS Kumar, O. Tschauner, P. Rodríguez-Hernández, J. López-Solano, S. Radescu, A. Mujica , A. Muñoz, G. Aquilanti: High-pressure structural study of the scheelite tungstates CaWO ₄ and SrWO ₄ . In: Physical Review B. 72, 2005, doi : 10.1103 / PhysRevB.72.174106 .

[Xin-Tao_Wu,_Ling_Chen-7] Xin-Tao Wu, Ling Chen: Structure-Property Relationships in Non-Linear Optical Crystals II The IR Region . Springer, 2012, ISBN 978-3-642-29621-5 , pp. 81 ( limited preview in Google Book search).

[DOI10.1016/j.spmi.2015.12.026-8] Yandong Ren, Yonghao Liu, Rui Yang: A series of color tunable yellow – orange – red-emitting SrWO ₄ : RE (Sm ³⁺ , Eu ³⁺ –Sm ³⁺ ) phosphor for near ultraviolet and blue light-based warm white light emitting diodes. In: Superlattices and Microstructures. 91, 2016, p. 138, doi : 10.1016 / j.spmi.2015.12.026 .

[Xiaohua_J._Huang-9] Xiaohua J. Huang: Nanotechnology Research New Nanostructures, Nanotubes and Nanofibers . Nova Publishers, 2008, ISBN 978-1-60021-902-3 , pp. 75 ( limited preview in Google Book search).