Phase transformations in feldspar group minerals with paracelsian topology under high temperature and high pressure

LA Gorelova - Russian Geology and Geophysics, 2023 - pubs.geoscienceworld.org
Feldspar group minerals (feldspars) form up to 60 vol.% of the Earth's crust. The knowledge
of their stability under extreme conditions (high-pressure and high-temperature) allow to …

Feldspar polymorphs: diversity, complexity, stability

SV Krivovichev - Записки Российского минералогического общества, 2020 - elibrary.ru
The various aspects of polymorphism in the feldspar family of minerals are considered with
special emphasis upon their structural diversity and complexity. The feldspar family is …

Combining MN6 Octahedra and PN5 Trigonal Bipyramids in the Mica‐like Nitridophosphates MP6N11 (M=Al, In)

SJ Ambach, M Pointner, S Falkai… - Angewandte …, 2023 - Wiley Online Library
Layered silicates are a very versatile class of materials with high importance to humanity.
The new nitridophosphates MP6N11 (M= Al, In), synthesized from MCl3, P3N5 and NH4N3 …

Metastable silica high pressure polymorphs as structural proxies of deep Earth silicate melts

E Bykova, M Bykov, A Černok, J Tidholm… - Nature …, 2018 - nature.com
Modelling of processes involving deep Earth liquids requires information on their structures
and compression mechanisms. However, knowledge of the local structures of silicates and …

Crystal Structure Evolution of Slawsonite SrAl2Si2O8 and Paracelsian BaAl2Si2O8 upon Compression and Decompression

LA Gorelova, AS Pakhomova… - The Journal of …, 2021 - ACS Publications
The high-pressure behavior of slawsonite, SrAl2Si2O8, has been studied using in situ single-
crystal X-ray diffraction (SCXRD) and Raman spectroscopy up to 31 GPa. Slawsonite …

Bi-doped silica glass: A combined XPS–DFT study of electronic structure and pleomorphic imperfections

DA Zatsepin, AF Zatsepin, DW Boukhvalov… - Journal of Alloys and …, 2020 - Elsevier
The results of X-ray photoelectron spectroscopy analysis (core-levels, valence band) and
first-principles modelling of bismuth implanted silicon dioxide electronic structure at various …

Polymorphism of feldspars above 10 GPa

A Pakhomova, D Simonova, I Koemets… - Nature …, 2020 - nature.com
Feldspars are rock-forming minerals that make up most of the Earth's crust. Along the mantle
geotherm, feldspars are stable at pressures up to 3 GPa and may persist metastably at …

Edge-sharing BO 4 tetrahedra and penta-coordinated silicon in the high-pressure modification of NaBSi 3 O 8

L Gorelova, A Pakhomova, G Aprilis, Y Yin… - Inorganic Chemistry …, 2022 - pubs.rsc.org
The high-pressure behavior of the borosilicate reedmergnerite NaBSi3O8 has been studied
using in situ single-crystal X-ray diffraction and Raman spectroscopy up to 35 GPa. The …

High pressure phase transitions of paracelsian BaAl2Si2O8

LA Gorelova, AS Pakhomova, SV Krivovichev… - Scientific reports, 2019 - nature.com
Three new polymorphs of aluminosilicate paracelsian, BaAl2Si2O8, have been discovered
using synchrotron-based in situ high-pressure single crystal X-ray diffraction. The first …

Penta- and hexa-coordinated beryllium and phosphorus in high-pressure modifications of CaBe2P2O8

A Pakhomova, G Aprilis, M Bykov, L Gorelova… - Nature …, 2019 - nature.com
Beryllium oxides have been extensively studied due to their unique chemical properties and
important technological applications. Typically, in inorganic compounds beryllium is …