Die Kristallstruktur von H.T.-GeS<sub>2</sub>

Dittmar, G.; Schäfer, H.

doi:10.1107/s0567740875006851

Cited by 169 publications

(96 citation statements)

References 4 publications

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“…This value is a little bit longer than in GeS x sharing Ge-Ge distances has a peak around 2.9 Å and a second one at 3.35-3.4 Å, separated by a minimum at 3.1 Å. The first value is similar to what was found in the Ge 25 (As,Ga) 10 S 65 system [41], in crystalline GeS 2 [61], and in GeS x glasses [59,60]. The third coordination shell around Ge at r Ge-Ge 3.5 Å found in earlier publications [40,59,60] seems to decompose a shorter ES (r = 3.4 Å) and a longer CS (r = 3.6 Å) distances in our simulation models.…”

Section: Constrained Simulationssupporting

confidence: 73%

Local motifs in GeS2–Ga2S3 glasses

Pethes

Nazabal

Chahal

et al. 2016

Journal of Alloys and Compounds

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The structure of (GeS 2 ) 0.75 (Ga 2 S 3 ) 0.25 and (GeS 2 ) 0.83 (Ga 2 S 3 ) 0.17 glasses was investigated by Raman scattering, high energy X-ray diffraction and extended X-ray absorption fine structure (EXAFS) measurements at the Ga and Ge K-edges. The reverse Monte Carlo simulation technique (RMC) was used to obtain structural models compatible with diffraction and EXAFS datasets. It was found that the coordination number of Ga is close to four. While Ge atoms have only S neighbors, Ga binds to S as well as to Ga atoms showing a violation of chemical ordering in GeS 2 -Ga 2 S 3 glasses. Analysis of the corner-and edge-sharing between [GeS 4/2 ] units revealed that about 30% of germanium atoms participate in the edge-shared tetrahedra.

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Section: Constrained Simulationssupporting

confidence: 73%

Local motifs in GeS2–Ga2S3 glasses

Pethes

Nazabal

Chahal

et al. 2016

Journal of Alloys and Compounds

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“…There are only two reports on -GeSe (13,14) and one on -GeSe (21). In all other synthesis reports only -GeSe , the stable ambient-pressure modification (20), has been obtained (15)(16)(17)(18)(19). The occurrence of -GeSe and six-coordinated Ge atoms at ambient pressure has been questioned by Dittmar and Scha¨fer (18).…”

Section: Introductionmentioning

confidence: 94%

“…Orthorhombic -GeSe (Pmmn or Pmn) has a distorted layered structure of CdI (P3 m1), where the cations are octahedrally coordinated (13,14). Layered -GeSe (P2 /c) is isotypic with the high-temperature modification of GeS (HT-GeS ), with GeSe tetrahedra connected via corners into chains along the a axis and by edge-sharing Ge Se double tetrahedra along the b axis (15)(16)(17)(18)(19). Recently, a second-order phase transition of -GeSe has been reported by St+len et al (20).…”

Section: Introductionmentioning

confidence: 96%

Pressure-Induced Amorphization of GeSe2

Grzechnik

Grande

Stølen

1998

Journal of Solid State Chemistry

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“…GeS 2 has two types of crystal structure. One is two-dimensional GeS 2 which is composed of corner-sharing GeS 4 tetrahedra cross-linked by edge-sharing tetrahedra and usually obtained at a relatively high temperature [7], and the other is three-dimensional GeS 2 crystal composed of corner-sharing GeS 4 tetrahedra with the same local structure as SiO 2 [8].…”

Section: Resultsmentioning

confidence: 99%