Zur polymorphie des In2Se3

Lutz, H. D.; Fischer, M.; Baldus, H. P.; Blachnik, R.

doi:10.1016/0022-5088(88)90033-1

Cited by 42 publications

(25 citation statements)

References 13 publications

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“…The list of the F o /F c data is available from the author up to one year after the publication has appeared. (3) Ϫ0.08 (3) Ϫ0.14(3) Se (3) 1.68(4) 1.59(4) 2.36(4) 0.70 (3) Ϫ0.20(4) 0.17 (3) higher frequency lattice modes and, hence, lower coordination numbers of the In 3ϩ ions in Ͳ-In 2 Se 3 compared to those of the Ͱ, ͰЈ, ͱ, and ͱЈ polymorphs (5,17). The results of Osmura et al (7), namely that the indium ions of Ͱ-In 2 Se 3 are located in tetrahedral sites, therefore must be doubted.…”

Section: Resultsmentioning

confidence: 99%

“…In the older literature as well as that by Likforman et al (2) (in contrast to Likforman et al (8)) and by Julien et al (3), Ͳ-In 2 Se 3 was claimed to be a high-temperature modification. In 1988, we argued for Ͳ-In 2 Se 3 as the room-temperature polymorph (5). Full confirmation of this reverse order, however, is lacking until now.…”

Section: Introductionmentioning

confidence: 82%

“…These results, however, were only qualitatively considered to be confirmed (9). Thus, it was concluded from the densities of the polymorphs under discussion that the coordination of the In 3ϩ ions is equal for Ͱand ͱ-In 2 Se 3 but larger than in the case of the Ͳ modification (5). Additional X-ray structure studies promised at that time (5) failed because of multiple twinning of the crystals obtained.…”

Section: Introductionmentioning

confidence: 97%

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Redetermination of the Crystal Structure of γ-In2Se3by Twin Crystal X-Ray Method

Pfitzner

Lutz

1996

Journal of Solid State Chemistry

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The crystal structure of ␥-In 2 Se 3 (P6 1 or P6 5 , Z ‫؍‬ 6, a ‫؍‬ 712.86(5), c ‫؍‬ 1938.1(2) pm) was redetermined by X-ray structure determination methods confirming the results of Likforman et al. reported in 1978 (8). The crystals (hexagonal pyramids and bipyramids, and small plates) obtained by chemical transport with iodine as transporting agent were multiple twins. The collected data of two twinned crystal specimens were refined (final R1 ‫؍‬ 0.0315 and 0.0559 for 1553 and 1602 independent reflections with I Ͼ 2 I , respectively). The structure is built up by In(1)Se 5 trigonal bipyramids and distorted In(2)Se 4 tetrahedra resulting in a distorted wurtzite-type-like arrangement. ␥-In 2 Se 3 is the room-temperature polymorph of indium(III) selenide contrary to some other reports in the literature, e.g., Julien et al. (1985) (3).

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 97%

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Redetermination of the Crystal Structure of γ-In2Se3by Twin Crystal X-Ray Method

Pfitzner

Lutz

1996

Journal of Solid State Chemistry

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“…Table 1 presents the main details of the α, β´ and β phases of In2Se3 involved in this work. 21,23,24,31,[37][38][39] In sections 2 and 3, we show the experimental and theoretical details. In section 4, we show the HP results of XRD and RS measurements and of ab initio calculations.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Studies on α-In₂Se₃ at High Pressure

et al. 2018

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α(R)-InSe has been experimentally and theoretically studied under compression at room temperature by means of X-ray diffraction and Raman scattering measurements as well as by ab initio total-energy and lattice-dynamics calculations. Our study has confirmed the α ( R3 m) → β' ( C2/ m) → β ( R3̅ m) sequence of pressure-induced phase transitions and has allowed us to understand the mechanism of the monoclinic C2/ m to rhombohedral R3̅ m phase transition. The monoclinic C2/ m phase enhances its symmetry gradually until a complete transformation to the rhombohedral R3̅ m structure is attained above 10-12 GPa. The second-order character of this transition is the reason for the discordance in previous measurements. The comparison of Raman measurements and lattice-dynamics calculations has allowed us to tentatively assign most of the Raman-active modes of the three phases. The comparison of experimental results and simulations has helped to distinguish between the different phases of InSe and resolve current controversies.

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“…As it has been mentioned, tetrahedral coordination of In in Ge-Se-In glasses has been supposed by Kosek et al [20]. Besides, it should be taken into account that indium is four-and fivefold coordinated in the crystalline γ-In 2 Se 3 [35]. tetrahedra, but bind Se atoms which are in excess.…”

Section: Ternary Gese 4 -In and Gese 5 -In Glassesmentioning

confidence: 99%

Structure of GeSe₄–In and GeSe₅–In glasses

Kaban

Jóvári

Petkova

et al. 2010

J. Phys.: Condens. Matter

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Abstract(Ge 0.2 Se 0.8 ) 100-x In x and (Ge 0.17 Se 0.83 ) 100-x In x (x = 0, 5, 10, 15 at.%) chalcogenide glasses have been studied with high-energy x-ray diffraction, neutron diffraction and extended x-ray absorption spectroscopy at Ge, Se and In K-edges. The experimental data were modelled simultaneously with the reverse Monte-Carlo simulation method. GeSe 4/2 tetrahedra are shown to be the main structural units in the binary and ternary glasses investigated. Indium bonds to the excess Se atoms in the ternary Ge-Se-In glasses. While majority of In atoms have three Se neighbours, some In atoms may be tetrahedrally coordinated by Se.

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Zur polymorphie des In2Se3

Cited by 42 publications

References 13 publications

Redetermination of the Crystal Structure of γ-In2Se3by Twin Crystal X-Ray Method

Redetermination of the Crystal Structure of γ-In2Se3by Twin Crystal X-Ray Method

Experimental and Theoretical Studies on α-In₂Se₃ at High Pressure

Structure of GeSe₄–In and GeSe₅–In glasses

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Zur polymorphie des In2Se3

Cited by 42 publications

References 13 publications

Redetermination of the Crystal Structure of γ-In2Se3by Twin Crystal X-Ray Method

Redetermination of the Crystal Structure of γ-In2Se3by Twin Crystal X-Ray Method

Experimental and Theoretical Studies on α-In2Se3 at High Pressure

Structure of GeSe4–In and GeSe5–In glasses

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Product

Resources

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Experimental and Theoretical Studies on α-In₂Se₃ at High Pressure

Structure of GeSe₄–In and GeSe₅–In glasses