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Physical properties of stable monoclinic and metastable trigonal 4-methylbenzophenone

✍ Scribed by Klapper, Helmut; Kutzke, H.; Haussühl, Siegfried

Book ID
120394886
Publisher
Oldenbourg Wissenschaftsverlag
Year
2000
Tongue
English
Weight
93 KB
Volume
215
Category
Article
ISSN
2194-4946

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✦ Synopsis

Pyroelectric, dielectric and piezoelectric coefficients of metastable 4-methylbenzophenone, point group 3, have been determined by standard methods. Furthermore, thermal expansion and elastic properties of this phase and of the stable monoclinic phase have been studied. The pyroelectric effect is comparable with that of tourmaline, the piezoelectric effects to those of a-quartz. The differences between the two polymorphs with respect to thermal expansion and to elastic and thermoelastic properties are small, but nevertheless significant.

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Synthesis, crystal structure, and physical properties of the monoclinic form of the R4Mo4O11 compounds (R=Yb and Lu) containing infinite chains of trans-edge-shared octahedral clusters
✍ Philippe Gall; Patrick Gougeon 📂 Article 📅 2008 🏛 Elsevier Science 🌐 English ⚖ 543 KB

Polycrystalline samples and single crystals of the R 4 Mo 4 O 11 compounds (R ¼ Yb and Lu) were synthesized by solid-state reactions at high temperature in sealed Mo crucibles. The structure of Lu 4 Mo 4 O 11 (a ¼ 10.5611(1), b ¼ 5.61930(5), c ¼ 15.6877 (2), b ¼ 99.5131(4) and Z ¼ 4) was determined