Lead day germanat

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Crystal structure
Crystal structure of lead metagermanate
Crystal structure of barium tellurite
__ Pb 2+      __ Ge 4+      __ O 2−
General
Surname Lead day germanat
Ratio formula PbGeO 3
External identifiers / databases
CAS number 12025-27-3
PubChem 73357724
Wikidata Q15628273
properties
Molar mass 327.84 g mol −1
safety instructions
GHS labeling of hazardous substances

Lead compounds

07 - Warning 08 - Dangerous to health 09 - Dangerous for the environment

danger

H and P phrases H: 360Df-332-302-373-410
P: ?
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Lead metagermanate is an inorganic chemical compound of lead from the group of germanates . In addition to this, there is at least one other lead germanate, Pb 5 Ge 3 O 11 .

Extraction and presentation

Lead metagermanate can be obtained by simultaneous hydrolysis of lead and germanium alkoxides. It can also be produced by the reaction of germanium dioxide with lead (II) acetate .

properties

Lead metagermanate is a solid that has a large pyroelectric effect. It occurs in two different crystal structures with a trigonal and orthorhombic structure, the transition taking place at temperatures above 600 ° C. A cubic phase also occurs at high pressures.

Individual evidence

  1. ↑ Entry on lead compounds in the GESTIS substance database of the IFA , accessed on April 27, 2019(JavaScript required) .
  2. ↑ Kazushi Hirota, Toshimori Sekine: Phase Relation in the System PbO – PbGeO3. In: Bulletin of the Chemical Society of Japan. 52, 1979, p. 1368, doi : 10.1246 / bcsj.52.1368 .
  3. ↑ a b Jane E. Macintyre: Dictionary of Inorganic Compounds . CRC Press, 1992, ISBN 978-0-412-30120-9 , pp. 3315 ( limited preview in Google Book search).
  4. ↑ Ning Wang, Jie Ding et al. a .: Synthesis and properties of PbGeO3 nanostructures. In: Crystal Research and Technology. 45, 2010, p. 316, doi : 10.1002 / crat.200900516 .
  5. ↑ Lexicon of Chemistry: Pyroelectricity - Lexicon of Chemistry , accessed on April 27, 2019
  6. ↑ O. Yamaguchi, K. Sugiura et al. a .: Compound formation in the system PbGeO3-Pb5Ge3O11. In: Journal of Inorganic and General Chemistry. 525, 1985, p. 230, doi : 10.1002 / zaac.19855250627 .
  7. ^ Issues in Geology and Mineralogy: 2013 Edition . ScholarlyEditions, 2013, ISBN 1-4901-0960-9 , pp. 593 ( limited preview in Google Book search).