New Nonlinear Optical Materials: Metal Oxides with Nonbonded Electrons

Bergman, J. G.; Boyd, G. D.; Ashkin, A.; Kurtz, S. K.

doi:10.1063/1.1658089

Cited by 114 publications

(64 citation statements)

References 21 publications

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“…This indicates Laue group 3m with possible space groups R32, R3m or R3m satisfying the lack of systematic absences. Of these, only R3m allows a satisfactory placing of one iodate group within the unit cell, while R32 is also inconsistent with the observed piezoelectric effect (Bergman, Boyd & Ashkin, 1966). R3rn was therefore chosen as the space group; this was finally confirmed by the successful refinement.…”

Section: Crystal Datamentioning

confidence: 98%

The crystal structure of α-rubidium iodate

Alcock¹

1972

Acta Crystallogr Sect B

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The crystal structure of one form of RbIO3 has been determined. The crystals are rhombohedral, a= 4-5377 (4) A,, ~= 89.71 (1) ° space group R3m. Refinement on 923 observed reflexions reached R= 2.3 %.The structure is a distortion of the perovskite structure in which the environment of the iodine atom is unsymmetrical with three near oxygen atoms (I-O 1.807 A,, O-I-O 99.63 °) and three at a further distance (I-O 2.753 A,). The rubidium ion has twelve neighbours, Rb-O between 3.103 and 3-377 ,~; Revised unit-cell dimensions are presented for KIOa, fl-RbIOa, CsIO3, AgIO3 and TIIO3.

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Section: Crystal Datamentioning

confidence: 98%

The crystal structure of α-rubidium iodate

Alcock¹

1972

Acta Crystallogr Sect B

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“…KIO 3 is a phase matchable crystal and shows signifi- cant non-linear optical effects [42,43]. Due to the low symmetry, crystal growth and the characterization of physical properties are difficult.…”

Section: Phase Transition Of Phase Matchable Crystal: Kiomentioning

confidence: 99%

Second harmonic generation measurements at high pressures on powder samples

Bayarjargal

Winkler

2014

Zeitschrift Für Kristallographie – Crystalline Materials

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This article reviews the most recent results concerning second harmonic generation (SHG) experiments of non-phase matchable and phase matchable powder samples at high pressures and explains the pressure dependence of the intensity of the SHG signal by correlating it to the ratio between the average coherence length and the average particle size. The examples discussed here include pressure-induced structural changes in quartz, ZnO, ice VII and KIO 3 . It is shown that the second harmonic generation technique is a unique tool for the detection of pressure-induced structural phase transitions. It is laboratory based and allows fast measurements. It is complementary to X-ray diffraction and provides additional information about the presence of an inversion center for unknown or controversially discussed structures at high pressure.

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“…) have been extensively studied because of their promising nonlinear optical properties (Bergman, Boyd & Ashkin, 1969). Contrary to tellurites with small metal ions (Hanke, 1967;Kohn, Inoue, Horie & Akimoto, 1976) or large ones like Sr 2+, Ba 2+, Pb 2+ (Burckhardt, Koqak, K/ilcii & Tr6mel, 1984;Folger, 1975;Young, 1979), there is a lack of knowledge concerning the structure of tellurites with medium-sized ions like Cd 2+ (Hanke, 1983).…”

Section: Introduction Many Tellurites Of the Type Mteomentioning

confidence: 99%