Research output: Contribution to journal › Article › peer-review
ПОВЕДЕНИЕ ЛАМПРОФИЛЛИТА И БАРИТОЛАМПРОФИЛЛИТА ПРИ ВЫСОКИХ ТЕМПЕРАТУРАХ. / Zhitova, E. S.; Panikorovskii, T. L.; Yakovenchuk, V. N.; Krzhizhanovskaya, M. G.
In: Zapiski Rossiiskogo Mineralogicheskogo Obshchestva, Vol. 147, No. 3, 01.01.2018, p. 82-94.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - ПОВЕДЕНИЕ ЛАМПРОФИЛЛИТА И БАРИТОЛАМПРОФИЛЛИТА ПРИ ВЫСОКИХ ТЕМПЕРАТУРАХ
AU - Zhitova, E. S.
AU - Panikorovskii, T. L.
AU - Yakovenchuk, V. N.
AU - Krzhizhanovskaya, M. G.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - According to the high-temperature X-ray powder diffraction data, lamprophyllite and barytolamprophylhte are stable up to 925 and 850 °C, respectively. The temperature of decomposition was defined for barytolamprophyllite by DSC and TGA methods as 897 °C. Analysis of the X-ray diffraction pattern during the heating has not detected any significant changes, implying the absence of phase transitions. Behavior of lamprophyllite and barytolamprophylhte at high-temperature is strongly anisotropic, thermal expansion coefficients (%10 6 ) along crystallographic axes at T = 200 °C are as following: a a = 12.6(6), a b = 7.7(1), a c = 4.4(2) °C-1 for lamprophyllite, and a a = 11.8(5), a b = 5.7(1), a c = 3.4(3) °C-1 for barytolamprophylhte. At T = 600 °C these values are a a = 15.2(5), a b = 7.7(1), a c = 2.2(2) °C-1 for lamprophyllite, and a a = 12.3(7), à b = 5.7(1), a c = -3.8(4) °C-1 for barytolamprophylhte. The contraction along the axis ñ was observed for barytolamprophyllite, but did not for lamprophyllite; it is caused by thermal oxidation of iron.
AB - According to the high-temperature X-ray powder diffraction data, lamprophyllite and barytolamprophylhte are stable up to 925 and 850 °C, respectively. The temperature of decomposition was defined for barytolamprophyllite by DSC and TGA methods as 897 °C. Analysis of the X-ray diffraction pattern during the heating has not detected any significant changes, implying the absence of phase transitions. Behavior of lamprophyllite and barytolamprophylhte at high-temperature is strongly anisotropic, thermal expansion coefficients (%10 6 ) along crystallographic axes at T = 200 °C are as following: a a = 12.6(6), a b = 7.7(1), a c = 4.4(2) °C-1 for lamprophyllite, and a a = 11.8(5), a b = 5.7(1), a c = 3.4(3) °C-1 for barytolamprophylhte. At T = 600 °C these values are a a = 15.2(5), a b = 7.7(1), a c = 2.2(2) °C-1 for lamprophyllite, and a a = 12.3(7), à b = 5.7(1), a c = -3.8(4) °C-1 for barytolamprophylhte. The contraction along the axis ñ was observed for barytolamprophyllite, but did not for lamprophyllite; it is caused by thermal oxidation of iron.
KW - Barytolamprophylhte
KW - High-temperature X-ray diffraction
KW - Lamprophyllite
UR - http://www.scopus.com/inward/record.url?scp=85063748300&partnerID=8YFLogxK
U2 - 10.30695/zrmo/2018.1473.06
DO - 10.30695/zrmo/2018.1473.06
M3 - статья
AN - SCOPUS:85063748300
VL - 147
SP - 82
EP - 94
JO - ЗАПИСКИ РОССИЙСКОГО МИНЕРАЛОГИЧЕСКОГО ОБЩЕСТВА
JF - ЗАПИСКИ РОССИЙСКОГО МИНЕРАЛОГИЧЕСКОГО ОБЩЕСТВА
SN - 0869-6055
IS - 3
ER -
ID: 41810139