LATTICE VIBRATIONS AND INFRARED ABSORPTION OF GERMANIUM, SILICON AND DIAMOND

1965 ◽  
pp. 355-368 ◽  
Author(s):  
H. BILZ ◽  
R. GEICK ◽  
K.F. RENK
Keyword(s):  
Infrared Absorption ◽  
Lattice Vibrations ◽  
Germanium Silicon

Infrared absorption of surface hydroxyl groups and lattice vibrations in lepidocrocite (γ-FeOOH) and boehmite (γ-AIOOH)

Clay Minerals ◽  
1986 ◽  
Vol 21 (1) ◽  
pp. 93-100 ◽  
Author(s):  
D. G. Lewis ◽  
V. C. Farmer
Keyword(s):  
Absorption Band ◽  
Infrared Absorption ◽  
Crystal Morphology ◽  
Thin Plates ◽  
Hydroxyl Groups ◽  
Lattice Vibrations ◽  
Surface Hydroxyl ◽  
Crystalline Order ◽  
Fine Grained ◽  
Surface Hydroxyl Groups

AbstractBoehmite and lepidocrocite, in the form of thin plates with well-developed (010) faces parallel to the constituent layers, show one predominant absorption band due to OH stretching of two-coordinated surface hydroxyl groups, which are shown to be unreactive towards phosphate. In very fine grained preparations of lepidocrocite, two other species of surface hydroxyl are detected, presumably associated with (100) and (001) faces. Marked differences in the frequencies of bulk vibrations between platy and rod-shaped lepidocrocite preparations can be explained partly by their crystal morphology, and partly by degree of crystalline order.

Lattice vibrations and infrared absorption of ice Ih

1986 ◽  
Vol 85 (5) ◽  
pp. 2414-2418 ◽  
Author(s):  
Massimo Marchi ◽  
John S. Tse ◽  
Michael L. Klein
Keyword(s):  
Infrared Absorption ◽  
Lattice Vibrations

Lattice vibrations and infrared absorption of mixed linear chains

1969 ◽  
Vol 7 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Marvin Hass ◽  
Herbert B. Rosenstock ◽  
Richard E. McGill
Keyword(s):  
Infrared Absorption ◽  
Lattice Vibrations ◽  
Linear Chains

Thermal Transport in Dilute Alloys

1960 ◽  
Vol 13 (2) ◽  
pp. 255 ◽  
Author(s):  
GK White
Keyword(s):  
Point Defects ◽  
Thermal Transport ◽  
Theoretical Data ◽  
Thermal Resistivity ◽  
Lattice Vibrations ◽  
Dilute Alloys ◽  
Lattice Waves ◽  
Experimental Values ◽  
Anharmonic Coupling ◽  
Germanium Silicon

Experimental values of the thermal resistivity for a number of elements, including copper, silver, gold, argon, germanium, silicon, antimony, and bismuth, are compared with theoretical values deduced from the anharmonic coupling between lattice vibrations. For copper-, silver-, and gold�rich alloys experimental and theoretical data for scattering of lattice waves by point defects are compared.

The infrared absorption spectra of mixed Ag3[AsO4, VO4] crystals

1979 ◽  
Vol 44 (11) ◽  
pp. 3346-3349 ◽  
Author(s):  
Bohumil Hájek ◽  
Alexander Muck ◽  
Olga Smrčková
Keyword(s):  
Absorption Spectra ◽  
Infrared Absorption ◽  
Factor Group ◽  
Mixed Crystals ◽  
Site Symmetry ◽  
Lattice Vibrations ◽  
Space Group ◽  
Infrared Absorption Spectra ◽  
Effective Site

Mixed Ag3[AsO4, VO4] crystals were prepared over the whole concentration range. In the 0-40% mol. Vanadate concentration range the mixed crystals are isostructural with Ag3AsO4 (T4d, Z = 2). Site- and factor group analyses were carried out for this space group and structure. Above 60 mol% vanadate, the mixed crystals are tetragonal with Ag3VO4 structure. It follows from the behaviour of the ν4AsO3-4 vibration that, in cubic mixed crystals with 40 mol% Ag3VO4, the site-symmetry T is reduced to effective site-symmetry C3 by the effect of lattice vibrations of the T(F) and R(F) types.

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