Crystal structures of K-cymrite and kokchetavite from single-crystal X-ray diffraction

Standard

Crystal structures of K-cymrite and kokchetavite from single-crystal X-ray diffraction. / Romanenko, Alexandr V.; Rashchenko, Sergey V.; Sokol, Alexander G. et al.

In: American Mineralogist, Vol. 106, No. 3, 26.03.2021, p. 404-409.

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

Harvard

Romanenko, AV, Rashchenko, SV, Sokol, AG, Korsakov, AV, Seryotkin, YV, Glazyrin, KV & Musiyachenko, K 2021, 'Crystal structures of K-cymrite and kokchetavite from single-crystal X-ray diffraction', American Mineralogist, vol. 106, no. 3, pp. 404-409. https://doi.org/10.2138/am-2020-7407

APA

Romanenko, A. V., Rashchenko, S. V., Sokol, A. G., Korsakov, A. V., Seryotkin, Y. V., Glazyrin, K. V., & Musiyachenko, K. (2021). Crystal structures of K-cymrite and kokchetavite from single-crystal X-ray diffraction. American Mineralogist, 106(3), 404-409. https://doi.org/10.2138/am-2020-7407

Vancouver

Romanenko AV, Rashchenko SV, Sokol AG, Korsakov AV, Seryotkin YV, Glazyrin KV et al. Crystal structures of K-cymrite and kokchetavite from single-crystal X-ray diffraction. American Mineralogist. 2021 Mar 26;106(3):404-409. doi: 10.2138/am-2020-7407

Author

Romanenko, Alexandr V. ; Rashchenko, Sergey V. ; Sokol, Alexander G. et al. / Crystal structures of K-cymrite and kokchetavite from single-crystal X-ray diffraction. In: American Mineralogist. 2021 ; Vol. 106, No. 3. pp. 404-409.

BibTeX

@article{ac25c66d712f4a3abcbb65ac3bfb4b36,

title = "Crystal structures of K-cymrite and kokchetavite from single-crystal X-ray diffraction",

abstract = "We determined for the first time the crystal structures of high-pressure K-cymrite (KAlSi3O8·H2O) and its dehydrated form kokchetavite (KAlSi3O8) using single-crystal X-ray difraction. The K-cymrite structure has been successfully refined in the hexagonal space group P6/mmm [a = 5.3361(3) {\AA}, c = 7.7081(7) {\AA}, V = 190.08(3) {\AA}3, R1 = 0.036 for 127 unique observed reflections], which is in agreement with previous models from powder X-ray difraction. In contrast, kokchetavite shows superstructural reflections, suggesting a diferent unit cell and a space group of P6/mcc [a = 10.5757(3) {\AA}, c = 15.6404(6) {\AA}, V = 1514.94(10) {\AA}3, R1 = 0.068 for 1455 unique observed reflections]. Upon dehydration, single-crystal grains of K-cymrite transform into single-crystal grains of kokchetavite. The latter questions a previous interpretation of kokchetavite crystals in mineral inclusions as a product of direct crystallization from fluid/melt. The Raman spectrum of K-cymrite shows a strong polarization dependence, which is important in identification of the mineral inclusions. ",

keywords = "K-cymrite, kokchetavite, Raman spectroscopy, single-crystal X-ray diffraction",

author = "Romanenko, {Alexandr V.} and Rashchenko, {Sergey V.} and Sokol, {Alexander G.} and Korsakov, {Andrey V.} and Seryotkin, {Yurii V.} and Glazyrin, {Konstantin V.} and Kira Musiyachenko",

year = "2021",

month = mar,

day = "26",

doi = "10.2138/am-2020-7407",

language = "English",

volume = "106",

pages = "404--409",

journal = "American Mineralogist",

issn = "0003-004X",

publisher = "Walter de Gruyter GmbH",

number = "3",

}

RIS

TY - JOUR

T1 - Crystal structures of K-cymrite and kokchetavite from single-crystal X-ray diffraction

AU - Romanenko, Alexandr V.

AU - Rashchenko, Sergey V.

AU - Sokol, Alexander G.

AU - Korsakov, Andrey V.

AU - Seryotkin, Yurii V.

AU - Glazyrin, Konstantin V.

AU - Musiyachenko, Kira

PY - 2021/3/26

Y1 - 2021/3/26

N2 - We determined for the first time the crystal structures of high-pressure K-cymrite (KAlSi3O8·H2O) and its dehydrated form kokchetavite (KAlSi3O8) using single-crystal X-ray difraction. The K-cymrite structure has been successfully refined in the hexagonal space group P6/mmm [a = 5.3361(3) Å, c = 7.7081(7) Å, V = 190.08(3) Å3, R1 = 0.036 for 127 unique observed reflections], which is in agreement with previous models from powder X-ray difraction. In contrast, kokchetavite shows superstructural reflections, suggesting a diferent unit cell and a space group of P6/mcc [a = 10.5757(3) Å, c = 15.6404(6) Å, V = 1514.94(10) Å3, R1 = 0.068 for 1455 unique observed reflections]. Upon dehydration, single-crystal grains of K-cymrite transform into single-crystal grains of kokchetavite. The latter questions a previous interpretation of kokchetavite crystals in mineral inclusions as a product of direct crystallization from fluid/melt. The Raman spectrum of K-cymrite shows a strong polarization dependence, which is important in identification of the mineral inclusions.

AB - We determined for the first time the crystal structures of high-pressure K-cymrite (KAlSi3O8·H2O) and its dehydrated form kokchetavite (KAlSi3O8) using single-crystal X-ray difraction. The K-cymrite structure has been successfully refined in the hexagonal space group P6/mmm [a = 5.3361(3) Å, c = 7.7081(7) Å, V = 190.08(3) Å3, R1 = 0.036 for 127 unique observed reflections], which is in agreement with previous models from powder X-ray difraction. In contrast, kokchetavite shows superstructural reflections, suggesting a diferent unit cell and a space group of P6/mcc [a = 10.5757(3) Å, c = 15.6404(6) Å, V = 1514.94(10) Å3, R1 = 0.068 for 1455 unique observed reflections]. Upon dehydration, single-crystal grains of K-cymrite transform into single-crystal grains of kokchetavite. The latter questions a previous interpretation of kokchetavite crystals in mineral inclusions as a product of direct crystallization from fluid/melt. The Raman spectrum of K-cymrite shows a strong polarization dependence, which is important in identification of the mineral inclusions.

KW - K-cymrite

KW - kokchetavite

KW - Raman spectroscopy

KW - single-crystal X-ray diffraction

UR - http://www.scopus.com/inward/record.url?scp=85102513690&partnerID=8YFLogxK

U2 - 10.2138/am-2020-7407

DO - 10.2138/am-2020-7407

M3 - Article

AN - SCOPUS:85102513690

VL - 106

SP - 404

EP - 409

JO - American Mineralogist

JF - American Mineralogist

SN - 0003-004X

IS - 3

ER -

ID: 28089964