Research output: Contribution to journal › Article › peer-review
Compressibility and structure behaviour of maruyamaite (K-tourmaline) from the Kokchetav massif at high pressure up to 20 GPa. / Likhacheva, Anna Yu; Rashchenko, S. V.; Musiyachenko, Kira A. et al.
In: Mineralogy and Petrology, Vol. 113, No. 5, 01.10.2019, p. 613-623.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Compressibility and structure behaviour of maruyamaite (K-tourmaline) from the Kokchetav massif at high pressure up to 20 GPa
AU - Likhacheva, Anna Yu
AU - Rashchenko, S. V.
AU - Musiyachenko, Kira A.
AU - Korsakov, Andrey V.
AU - Collings, Ines E.
AU - Hanfland, Michael
N1 - Publisher Copyright: © 2019, Springer-Verlag GmbH Austria, part of Springer Nature.
PY - 2019/10/1
Y1 - 2019/10/1
N2 - The structural behaviour of maruyamaite (K-dominant tourmaline) X(K0.54Na0.28Ca0.19)Y(Mg1.3Al1.17Fe0.39Ti0.14)Z(Al5Mg)[Si5.95Al0.05O18](BO3)3V,W[O1.69(OH)2.31] from the ultrahigh-pressure metamorphic rocks of Kokchetav massif was studied using synchrotron based single-crystal diffraction up to 20 GPa. Within the whole pressure range the compression is regular and anisotropic, with the c direction being more compressible than the a direction. Fitting the V/P data with the 2nd and 3rd order Birch-Murnaghan equations of state gives: V0 = 1587.2(7) Å3, K0 = 115.6(9) GPa at fixed K′ = 4, and V0 = 1588(1) Å3, K0 = 112(3) GPa, K′ = 4.5(4). The bulk modulus values are slightly higher as compared to those found for dravite and cation-deficient synthetic K-dravite. The pressure evolution of the main structural parameters of K-tourmaline is similar to those of dravite. However, a minor change in the rigidity of local contacts of the X site with 6-membered ring, due to the presence of K, is apparently critical for stabilization of tourmaline structure within 15–20 GPa, which is evinced by the absence of the phase transition observed in dravite near 15.4 GPa. The stabilizing function of K becomes apparent at P > 15 GPa. The comparison of the HP structural behaviour of maruyamaite and dravite supports the recent suggestion that the large X site plays a secondary role in the elastic behaviour of tourmaline, compared to the octahedral framework. In addition, the present study reveals several new features of polyhedra distortions, which demonstrate their complex interaction on compression.
AB - The structural behaviour of maruyamaite (K-dominant tourmaline) X(K0.54Na0.28Ca0.19)Y(Mg1.3Al1.17Fe0.39Ti0.14)Z(Al5Mg)[Si5.95Al0.05O18](BO3)3V,W[O1.69(OH)2.31] from the ultrahigh-pressure metamorphic rocks of Kokchetav massif was studied using synchrotron based single-crystal diffraction up to 20 GPa. Within the whole pressure range the compression is regular and anisotropic, with the c direction being more compressible than the a direction. Fitting the V/P data with the 2nd and 3rd order Birch-Murnaghan equations of state gives: V0 = 1587.2(7) Å3, K0 = 115.6(9) GPa at fixed K′ = 4, and V0 = 1588(1) Å3, K0 = 112(3) GPa, K′ = 4.5(4). The bulk modulus values are slightly higher as compared to those found for dravite and cation-deficient synthetic K-dravite. The pressure evolution of the main structural parameters of K-tourmaline is similar to those of dravite. However, a minor change in the rigidity of local contacts of the X site with 6-membered ring, due to the presence of K, is apparently critical for stabilization of tourmaline structure within 15–20 GPa, which is evinced by the absence of the phase transition observed in dravite near 15.4 GPa. The stabilizing function of K becomes apparent at P > 15 GPa. The comparison of the HP structural behaviour of maruyamaite and dravite supports the recent suggestion that the large X site plays a secondary role in the elastic behaviour of tourmaline, compared to the octahedral framework. In addition, the present study reveals several new features of polyhedra distortions, which demonstrate their complex interaction on compression.
KW - crystal structure refinement
KW - High pressure
KW - K-tourmaline
KW - Kokchetav Massif
KW - Maruyamaite
KW - northern Kazakhstan
KW - single-crystal diffraction
KW - UHP metamorphism
KW - SYSTEM
KW - CORDIERITE
KW - DRAVITE
KW - SREF
KW - OSCILLATORY ZONED LIDDICOATITE
KW - ANJANABONOINA
KW - SINGLE-CRYSTAL DIFFRACTION
KW - PHASE
KW - CHEMISTRY
KW - MOSSBAUER
UR - http://www.scopus.com/inward/record.url?scp=85068178056&partnerID=8YFLogxK
U2 - 10.1007/s00710-019-00672-0
DO - 10.1007/s00710-019-00672-0
M3 - Article
AN - SCOPUS:85068178056
VL - 113
SP - 613
EP - 623
JO - Mineralogy and Petrology
JF - Mineralogy and Petrology
SN - 0930-0708
IS - 5
ER -
ID: 20710266