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Single Crystal Elasticity Of Natural Topaz At High-temperatures

Title: Single Crystal Elasticity Of Natural Topaz At High-temperatures.
Name(s): Tennakoon, Sumudu, author
Peng, Ye, author
Mookherjee, Mainak, author
Speziale, Sergio, author
Manthilake, Geeth, author
Besara, Tiglet, author
Andreu, Luis, author
Rivera, Fernando, author
Type of Resource: text
Genre: Journal Article
Journal Article
Date Issued: 2018-01-22
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: Topaz is an aluminosilicate mineral phase stable in the hydrothermally altered pegmatitic rocks and also in subducted sedimentary lithologies. In nature, topaz often exhibits solid solution between fluorine and hydrous end members. We investigated elasticity of naturally occurring single crystal topaz (Al2SiO4F1.42(OH)(0.58)) using Resonant Ultrasound Spectroscopy. We also explored the temperature dependence of the full elastic constant tensor. We find that among the various minerals stable in the Al2O3-SiO2-H2O ternary system, topaz exhibits moderate elastic anisotropy. As a function of temperature, the sound velocity of topaz decreases with dV(P)/dT and dV(S)/dT being -3.10 and -2.30 x 10(-4) km/s/K. The elasticity and sound velocity of topaz also vary as a function of OH and F content. The effect of composition (x(OH)) on the velocity is equally important as that of the effect of temperature. We also note that the Debye temperature (Theta(D)) of topaz at room temperature condition is 910 K and decreases at higher temperature. The Debye temperature shows positive correlation with density of the mineral phases in the Al2O3-SiO2-H2O ternary system.
Identifier: FSU_libsubv1_wos_000422912100055 (IID), 10.1038/s41598-017-17856-3 (DOI)
Keywords: behavior, high-pressure, minerals, constants, eastern china, fluorine content, hydrous aluminosilicate phase, oh-rich topaz, resonant ultrasound spectroscopy, solid-solutions
Publication Note: The publisher's version of record is available at
Persistent Link to This Record:
Host Institution: FSU
Is Part Of: Scientific Reports.
Issue: vol. 8

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Tennakoon, S., Peng, Y., Mookherjee, M., Speziale, S., Manthilake, G., Besara, T., … Rivera, F. (2018). Single Crystal Elasticity Of Natural Topaz At High-temperatures. Scientific Reports. Retrieved from