Journal of Solid State Chemistry

, том 179 , издание 2 , страницы 421-428

Phase transitions in K3AlF6

Artem M. Abakumov ¹

Marta Rossell ²

Anastasiya M. Alekseeva ¹

Sergey Yu. Vassiliev ¹

Svetlana N Mudrezova ¹

Gustaaf Van Tendeloo ²

Evgeny V. Antipov ¹

Скрыть аффилиации авторов Показать аффилиации авторов: 2 аффилиации

Department of Chemistry Moscow State University Moscow 119992 Russia |

EMAT University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium. |

Тип публикации: Journal Article

Дата публикации: 2006-02-01

Elsevier

Journal of Solid State Chemistry

scimago Q2

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БС2

SJR: 0.629

CiteScore: 6.8

Impact factor: 3.5

ISSN: 00224596, 1095726X

DOI: 10.1016/j.jssc.2005.10.044

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Materials Chemistry

Ceramics and Composites

Electronic, Optical and Magnetic Materials

Inorganic Chemistry

Physical and Theoretical Chemistry

Condensed Matter Physics

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Abstract Phase transitions in the elpasolite-type K3AlF6 complex fluoride were investigated using differential scanning calorimetry, electron diffraction and X-ray powder diffraction. Three phase transitions were identified with critical temperatures T 1 = 132 ° C , T 2 = 153 ° C and T 3 = 306 ° C . The α-K3AlF6 phase is stable below T1 and crystallizes in a monoclinic unit cell with a = 18.8588 ( 2 ) A , b = 34.0278 ( 2 ) A , c = 18.9231 ( 1 ) A , β = 90.453 ( 1 ) ° (a=2ac−cc, b=4bc, c=ac+2cc; ac, bc, cc—the basic lattice vectors of the face-centered cubic elpasolite structure) and space group I2/a or Ia. The intermediate β phase exists only in very narrow temperature interval between T1 and T2. The γ polymorph is stable in the T 2 T T 3 temperature range and has an orthorhombic unit cell with a = 36.1229 ( 6 ) A , b = 17.1114 ( 3 ) A , c = 12.0502 ( 3 ) A (a=3ac−3cc, b=2bc, c=ac+cc) at 250 °C and space group Fddd. Above T3 the cubic δ polymorph forms with a c = 8.5786 ( 4 ) A at 400 °C and space group Fm 3 ¯ m . The similarity between the K3AlF6 and K3MoO3F3 compounds is discussed.

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Антипов Евгений

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Московский государственный университет имени М.В. Ломоносова

Сколковский институт науки и технологий

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Abakumov A. M. et al. Phase transitions in K3AlF6 // Journal of Solid State Chemistry. 2006. Vol. 179. No. 2. pp. 421-428.

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Abakumov A. M., Rossell M., Alekseeva A. M., Vassiliev S. Y., Mudrezova S. N., Van Tendeloo G., Antipov E. V. Phase transitions in K3AlF6 // Journal of Solid State Chemistry. 2006. Vol. 179. No. 2. pp. 421-428.

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TY - JOUR

DO - 10.1016/j.jssc.2005.10.044

UR - https://linkinghub.elsevier.com/retrieve/pii/S0022459605005104

TI - Phase transitions in K3AlF6

T2 - Journal of Solid State Chemistry

AU - Abakumov, Artem M.

AU - Rossell, Marta

AU - Alekseeva, Anastasiya M.

AU - Vassiliev, Sergey Yu.

AU - Mudrezova, Svetlana N

AU - Van Tendeloo, Gustaaf

AU - Antipov, Evgeny V.

PY - 2006

DA - 2006/02/01

PB - Elsevier

SP - 421-428

IS - 2

VL - 179

SN - 0022-4596

SN - 1095-726X

ER -

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@article{2006_Abakumov,

author = {Artem M. Abakumov and Marta Rossell and Anastasiya M. Alekseeva and Sergey Yu. Vassiliev and Svetlana N Mudrezova and Gustaaf Van Tendeloo and Evgeny V. Antipov},

title = {Phase transitions in K3AlF6},

journal = {Journal of Solid State Chemistry},

year = {2006},

volume = {179},

publisher = {Elsevier},

month = {feb},

url = {https://linkinghub.elsevier.com/retrieve/pii/S0022459605005104},

number = {2},

pages = {421--428},

doi = {10.1016/j.jssc.2005.10.044}

}

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Abakumov, Artem M., et al. “Phase transitions in K3AlF6.” Journal of Solid State Chemistry, vol. 179, no. 2, Feb. 2006, pp. 421-428. https://linkinghub.elsevier.com/retrieve/pii/S0022459605005104.