Thermal Expansion and Polymorphism of Slawsonite SrAl2Si2O8

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Thermal Expansion and Polymorphism of Slawsonite SrAl2Si2O8. / Gorelova, Liudmila ; Vereshchagin, Oleg ; Kasatkin, Anatoly .

In: Minerals, Vol. 11, No. 10, 1150, 18.10.2021.

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

BibTeX

@article{8f37e6fae4bf44bba9dfdc6300337981,

title = "Thermal Expansion and Polymorphism of Slawsonite SrAl2Si2O8",

abstract = "Slawsonite{\textquoteright}s (SrAl2Si2O8) structure evolutions depending on temperature (27–1000 ℃) have been studied by in situ single-crystal X-ray diffraction. The SrO7 polyhedron expands regularly with the temperature increase. Silicon and aluminum cations are ordered in tetrahedral sites of the studied slawsonite; no significant changes in their distribution as temperature increases were observed. Slawsonite demonstrates a relatively high volume thermal expansion (αV = 23 × 10–6 °C–1) with high anisotropy, typical for framework feldspar-related minerals and synthetic compounds. It was found that, contrary to previously published data, the crystal structure of slawsonite is stable in the studied temperature range and no phase transitions occur up to 1000 °C. The role of Ca and Ba substitution for Sr and Al/Si ordering on polymorphism of natural MAl2Si2O8 (M = Ca, Sr, Ba) is herein discussed.",

keywords = "slawsonite, feldspar, crystal structure, thermal expansion, high temperature, single-crystal X-ray diffraction, Thermal expansion, Slawsonite, High temperature, Single-crystal X-ray diffraction, Crystal structure, Feldspar",

author = "Liudmila Gorelova and Oleg Vereshchagin and Anatoly Kasatkin",

note = "Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2021",

month = oct,

day = "18",

doi = "10.3390/min11101150",

language = "English",

volume = "11",

journal = "Minerals",

issn = "2075-163X",

publisher = "MDPI AG",

number = "10",

}

RIS

TY - JOUR

T1 - Thermal Expansion and Polymorphism of Slawsonite SrAl2Si2O8

AU - Gorelova, Liudmila

AU - Vereshchagin, Oleg

AU - Kasatkin, Anatoly

PY - 2021/10/18

Y1 - 2021/10/18

N2 - Slawsonite’s (SrAl2Si2O8) structure evolutions depending on temperature (27–1000 ℃) have been studied by in situ single-crystal X-ray diffraction. The SrO7 polyhedron expands regularly with the temperature increase. Silicon and aluminum cations are ordered in tetrahedral sites of the studied slawsonite; no significant changes in their distribution as temperature increases were observed. Slawsonite demonstrates a relatively high volume thermal expansion (αV = 23 × 10–6 °C–1) with high anisotropy, typical for framework feldspar-related minerals and synthetic compounds. It was found that, contrary to previously published data, the crystal structure of slawsonite is stable in the studied temperature range and no phase transitions occur up to 1000 °C. The role of Ca and Ba substitution for Sr and Al/Si ordering on polymorphism of natural MAl2Si2O8 (M = Ca, Sr, Ba) is herein discussed.

AB - Slawsonite’s (SrAl2Si2O8) structure evolutions depending on temperature (27–1000 ℃) have been studied by in situ single-crystal X-ray diffraction. The SrO7 polyhedron expands regularly with the temperature increase. Silicon and aluminum cations are ordered in tetrahedral sites of the studied slawsonite; no significant changes in their distribution as temperature increases were observed. Slawsonite demonstrates a relatively high volume thermal expansion (αV = 23 × 10–6 °C–1) with high anisotropy, typical for framework feldspar-related minerals and synthetic compounds. It was found that, contrary to previously published data, the crystal structure of slawsonite is stable in the studied temperature range and no phase transitions occur up to 1000 °C. The role of Ca and Ba substitution for Sr and Al/Si ordering on polymorphism of natural MAl2Si2O8 (M = Ca, Sr, Ba) is herein discussed.

KW - slawsonite

KW - feldspar

KW - crystal structure

KW - thermal expansion

KW - high temperature

KW - single-crystal X-ray diffraction

KW - Thermal expansion

KW - Slawsonite

KW - High temperature

KW - Single-crystal X-ray diffraction

KW - Crystal structure

KW - Feldspar

UR - https://www.mdpi.com/2075-163X/11/10/1150

UR - http://www.scopus.com/inward/record.url?scp=85117190879&partnerID=8YFLogxK

U2 - 10.3390/min11101150

DO - 10.3390/min11101150

M3 - Article

VL - 11

JO - Minerals

JF - Minerals

SN - 2075-163X

IS - 10

M1 - 1150

ER -

ID: 86670729