Structural Evolution of α-Quartz Type Si1-xGexO2 Solid Solution at High Pressure | Sciact - CRIS-system of Boreskov Institute of Catalysis

Structural Evolution of α-Quartz Type Si1-xGexO2 Solid Solution at High Pressure Full article

Journal

Journal of Solid State Chemistry
ISSN: 0022-4596 , E-ISSN: 1095-726X

Output data

Year: 2025, Volume: 352, Article number : 125596, Pages count : 7 DOI: 10.1016/j.jssc.2025.125596

Tags

Quartz; Germanium oxide; Solid solution; High pressure; Phase transition

Authors

Spivak Anna V. ¹ , Rashchenko Sergey V. ² , Setkova Tatiana V. ¹ , Bogdanov Nikita E. ² , Kovalev Valentin N. ¹ , Zakharchenko Egor S. ¹

Affiliations

1	Korzhinskii Institute of Experimental Mineralogy of the Russian Academy of Sciences (IEM RAS), Chernogolovka, 142342, Moscow region, Russia
2	Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, Novosibirsk, 630090, Russia

The α-quartz Si1-xGexO2 solid solution is of great scientific interest both as a high-pressure model of silicates due to a chemical deformation of the structure and as a prospective material with piezoelectric properties. We present a complex study (energy dispersive X-ray spectroscopy, factor-group analysis and in situ high pressure singlecrystal Х-ray diffraction and Raman spectroscopy up to ~16 GPa) on the synthetic α-quartz Si1-xGexO2 (x = 0.2) solid solution. It has been shown that the α-Si0.8Ge0.2O2 (sp.g. P3221) remains stable up to 7–8 GPa upon compression at room temperature. Further structural evolution leads to transformation into the intermediate trigonal phase (sp.g. P3211) up to ~11 GPa and into its translation-equivalent triclinic subgroup (sp.g. P1) above 11 GPa.

Spivak A.V. , Rashchenko S.V. , Setkova T.V. , Bogdanov N.E. , Kovalev V.N. , Zakharchenko E.S.
Structural Evolution of α-Quartz Type Si1-xGexO2 Solid Solution at High Pressure
Journal of Solid State Chemistry. 2025. V.352. 125596 :1-7. DOI: 10.1016/j.jssc.2025.125596 WOS Scopus OpenAlex

Submitted:	Apr 28, 2025
Accepted:	Aug 18, 2025
Published online:	Aug 19, 2025
Published print:	Dec 1, 2025

Web of science:	WOS:001561338300002
Scopus:	2-s2.0-105013835626
OpenAlex:	W4413365345

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