Compressibility and pressure-induced structural evolution of kokchetavite, hexagonal polymorph of KAlSi3O8, by single-crystal X-ray diffraction

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Compressibility and pressure-induced structural evolution of kokchetavite, hexagonal polymorph of KAlSi3O8, by single-crystal X-ray diffraction. / Romanenko, Alexandr V.; Rashchenko, Sergey V.; Korsakov, Andrey V. et al.

In: American Mineralogist, Vol. 109, No. 7, 01.07.2024, p. 1284-1291.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{7898adfcd3b24448b2f8b769ef5fb791,

title = "Compressibility and pressure-induced structural evolution of kokchetavite, hexagonal polymorph of KAlSi3O8, by single-crystal X-ray diffraction",

abstract = "Compressibility and pressure-induced structural evolution of kokchetavite, the hexagonal polymorph of KAlSi3O8, has been studied up to 11.8 GPa using synchrotron single-crystal X-ray diffraction. Two phase transitions were observed at pressures of ~0.3 and 10.4 GPa. Kokchetavite-I (as-synthesized, P6/mcc) transforms into kokchetavite-II with the P6c2 space group. Kokchetavite-II → kokchetavite-III phase transition at ~10.4 GPa is accompanied by a change of symmetry to probably orthorhombic. After pressure release, kokchetavite reverts to the initial single-crystal state with P6/mcc space group. A second-order Birch-Murnaghan equation of state was calculated for phase kokchetavite-II with coefficients V0 = 1486(3) {\AA}3, K0 = 59(2) GPa.",

keywords = "K-cymrite, KAlSi3O8, Kokchetavite, feldspar polymorphism, high-pressure crystallography, synchrotron X-ray diffraction",

author = "Romanenko, {Alexandr V.} and Rashchenko, {Sergey V.} and Korsakov, {Andrey V.} and Sokol, {Alexander G.} and Kokh, {Konstantin A.}",

note = "This study is supported by the Russian Scientific Foundation (project 18-17-00186). A major part of the analytical procedures was carried out at the Analytical Center for multi-elemental and isotope research, Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences (IGM SB RAS), Novosibirsk, Russia. A.G. Sokol and K.A. Kokh work on K-cymrite synthesis was supported by the Russian Scientific Foundation (project 22-17-00005) and by state assignment of IGM SB RAS",

year = "2024",

month = jul,

day = "1",

doi = "10.2138/am-2023-9120",

language = "English",

volume = "109",

pages = "1284--1291",

journal = "American Mineralogist",

issn = "0003-004X",

publisher = "Walter de Gruyter GmbH",

number = "7",

}

RIS

TY - JOUR

T1 - Compressibility and pressure-induced structural evolution of kokchetavite, hexagonal polymorph of KAlSi3O8, by single-crystal X-ray diffraction

AU - Romanenko, Alexandr V.

AU - Rashchenko, Sergey V.

AU - Korsakov, Andrey V.

AU - Sokol, Alexander G.

AU - Kokh, Konstantin A.

N1 - This study is supported by the Russian Scientific Foundation (project 18-17-00186). A major part of the analytical procedures was carried out at the Analytical Center for multi-elemental and isotope research, Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences (IGM SB RAS), Novosibirsk, Russia. A.G. Sokol and K.A. Kokh work on K-cymrite synthesis was supported by the Russian Scientific Foundation (project 22-17-00005) and by state assignment of IGM SB RAS

PY - 2024/7/1

Y1 - 2024/7/1

N2 - Compressibility and pressure-induced structural evolution of kokchetavite, the hexagonal polymorph of KAlSi3O8, has been studied up to 11.8 GPa using synchrotron single-crystal X-ray diffraction. Two phase transitions were observed at pressures of ~0.3 and 10.4 GPa. Kokchetavite-I (as-synthesized, P6/mcc) transforms into kokchetavite-II with the P6c2 space group. Kokchetavite-II → kokchetavite-III phase transition at ~10.4 GPa is accompanied by a change of symmetry to probably orthorhombic. After pressure release, kokchetavite reverts to the initial single-crystal state with P6/mcc space group. A second-order Birch-Murnaghan equation of state was calculated for phase kokchetavite-II with coefficients V0 = 1486(3) Å3, K0 = 59(2) GPa.

AB - Compressibility and pressure-induced structural evolution of kokchetavite, the hexagonal polymorph of KAlSi3O8, has been studied up to 11.8 GPa using synchrotron single-crystal X-ray diffraction. Two phase transitions were observed at pressures of ~0.3 and 10.4 GPa. Kokchetavite-I (as-synthesized, P6/mcc) transforms into kokchetavite-II with the P6c2 space group. Kokchetavite-II → kokchetavite-III phase transition at ~10.4 GPa is accompanied by a change of symmetry to probably orthorhombic. After pressure release, kokchetavite reverts to the initial single-crystal state with P6/mcc space group. A second-order Birch-Murnaghan equation of state was calculated for phase kokchetavite-II with coefficients V0 = 1486(3) Å3, K0 = 59(2) GPa.

KW - K-cymrite

KW - KAlSi3O8

KW - Kokchetavite

KW - feldspar polymorphism

KW - high-pressure crystallography

KW - synchrotron X-ray diffraction

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85198964345&origin=inward&txGid=a1477b39e93ef095b15ad553bf57f574

UR - https://www.mendeley.com/catalogue/b1a5f05f-4648-37fa-9305-928af2afc324/

U2 - 10.2138/am-2023-9120

DO - 10.2138/am-2023-9120

M3 - Article

VL - 109

SP - 1284

EP - 1291

JO - American Mineralogist

JF - American Mineralogist

SN - 0003-004X

IS - 7

ER -

ID: 60863351