Copper germanat

Crystal structure
	__ Cu 2+ __ Ge 4+ __ O 2−
Crystal system	orthorhombic
Space group	Pbmm (No. 51, position 3)
Lattice parameters	a = 481 pm, b = 847 pm, c = 294.1 pm
Coordination numbers	[6] Cu, [4] Ge
General
Surname	Copper germanat
other names	Copper metagermanat; Copper (II) germanium (IV) oxide;
Ratio formula	CuGeO 3
Brief description	green-blue solid
External identifiers / databases
Wikidata	Q15628271
properties
Molar mass	184.1 g mol −1
Physical state	firmly
Melting point	1179–1200 ° C (decomposition)
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Kupfergermanat is a chemical compound of the copper from the group of germanates .

Extraction and presentation

Copper germanate can be obtained by reacting copper or copper (II) oxide with germanium dioxide .

properties

Copper germanate is a green-blue solid. It has an orthorhombic crystal structure with the space group Pbmm (space group no. 51, position 3) . At high pressures there is a transition to a monoclinic crystal structure. The junction exhibits a specific magnetic behavior known as the Peierls transition at 14K. It was the first inorganic compound discovered to show this behavior. Template: room group / 51.3

Individual evidence

↑ ^a ^b H. Völlenkle, A. Wittmann, H. Nowotny: On the crystal structure of CuGeO ₃ . In: Monthly magazine for chemistry . 98, 1967, pp. 1352-1357, doi : 10.1007 / BF00909002 .
↑ ^a ^b ^c Jane E. Macintyre: Dictionary of Inorganic Compounds, Supplement 3 . CRC Press, 1995, ISBN 978-0-412-49110-8 , pp. 279 ( limited preview in Google Book search).
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
↑ LZ Pei, YQ Pei u. a .: Dependence of growth conditions on copper germanate nanowires and their electrochemical characteristics. In: Materials Science-Poland. 29, 2011, pp. 241-247, doi : 10.2478 / s13536-011-0040-6 .
↑ ^a ^b Makoto Tachibana: Beginner's Guide to Flux Crystal Growth . Springer, 2017, ISBN 978-4-431-56587-1 , pp. 104 ( limited preview in Google Book search).
^ High Pressure Science And Technology - Proceedings Of The Joint XV AIRAPT & XXXIII EHPRG International Conference . World Scientific, 1996, ISBN 981-4548-16-2 , pp. 423 ( limited preview in Google Book search).
↑ Kenneth R. O'Neal, Amal al-Wahish et al. a .: Charge and Bonding in CuGeO ₃ Nanorods. In: Nano Letters . 18, 2018, pp. 3428-3434, doi : 10.1021 / acs.nanolett.8b00407 .
↑ Mark A. Green, Mohamedally Kurmoo u. A .: The crystal structure and magnetic properties of CuGeO ₃ . In: Journal of the Chemical Society, Chemical Communications . 1994, pp. 1995-1996, doi : 10.1039 / C39940001995 .

[DOI10.1007/BF00909002-1] H. Völlenkle, A. Wittmann, H. Nowotny: On the crystal structure of CuGeO ₃ . In: Monthly magazine for chemistry . 98, 1967, pp. 1352-1357, doi : 10.1007 / BF00909002 .

[Jane_E._Macintyre-2] Jane E. Macintyre: Dictionary of Inorganic Compounds, Supplement 3 . CRC Press, 1995, ISBN 978-0-412-49110-8 , pp. 279 ( limited preview in Google Book search).

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[DOI10.2478/s13536-011-0040-6-4] LZ Pei, YQ Pei u. a .: Dependence of growth conditions on copper germanate nanowires and their electrochemical characteristics. In: Materials Science-Poland. 29, 2011, pp. 241-247, doi : 10.2478 / s13536-011-0040-6 .

[Makoto_Tachibana-5] Makoto Tachibana: Beginner's Guide to Flux Crystal Growth . Springer, 2017, ISBN 978-4-431-56587-1 , pp. 104 ( limited preview in Google Book search).

[Proceedings_Of_The_Joint_Xv_Airapt_...-6] High Pressure Science And Technology - Proceedings Of The Joint XV AIRAPT & XXXIII EHPRG International Conference . World Scientific, 1996, ISBN 981-4548-16-2 , pp. 423 ( limited preview in Google Book search).

[DOI10.1021/acs.nanolett.8b00407-7] Kenneth R. O'Neal, Amal al-Wahish et al. a .: Charge and Bonding in CuGeO ₃ Nanorods. In: Nano Letters . 18, 2018, pp. 3428-3434, doi : 10.1021 / acs.nanolett.8b00407 .

[DOI10.1039/C39940001995-8] Mark A. Green, Mohamedally Kurmoo u. A .: The crystal structure and magnetic properties of CuGeO ₃ . In: Journal of the Chemical Society, Chemical Communications . 1994, pp. 1995-1996, doi : 10.1039 / C39940001995 .