Polyhedron distortions in tourmaline
WebUvite, CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH), a new, but long-anticipated mineral species of the tourmaline supergroup from San Piero in Campo, Elba Island, Italy - Volume 86 Issue 5. ... (2002) Polyhedron distortions in tourmaline. The Canadian Mineralogist, 40, 153 ... WebAug 24, 2012 · We studied four tourmalines with different Fe contents from Xinjiang, Sichuan, and Yunnan provinces of China using Mössbauer spectroscopy and single …
Polyhedron distortions in tourmaline
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WebIn this study, single crystal X-ray diffraction analysis of the structure of data , calculate the the polyhedron distorted parameters and inherent electric dipole moment , and explore the valence state of iron in tourmaline structure , content and distribution of its structure , intrinsic electric dipole moment and pyroelectric properties . WebTheoretical bond-length calculations from ideal bond valences for each ion and coordination allow for the prediction of ion site preference and partitioning in tourmaline structures at low-pressure conditions. A comparison of calculated data with published bond-length values enables the determination of the range of structurally stable bond lengths with a minimal …
WebErtl A, Hughes J M, Pertlik F, Foit F F, Wright S E, Brandstätter F, Marler B (2002) Polyhedron distortions in tourmaline, The Canadian Mineralogist, 40, 153-162 Hawthorne F C (2002) … http://qiserver.ugr.es/cod/result.php?CODSESSION=fee1qha8a0b7c1gmm910nmi651&page=3&count=100&order_by=sg&order=desc
WebAbstract. Distortion parameters [?, s2, DI (Y-O), DI (O-Y-O), DI (O-O)] have been calculated for cation polyhedra in tourmalines of different chemical compositions. Tourmalines with … WebOct 19, 2009 · Pale-blue to pale-green tourmalines from the contact zone of Permian pegmatites to mica schists and marbles from different localities of the Austroalpine basement units (Rappold Complex) in Styria, Austria, are characterized. All these Mg-rich tourmalines have small but significant Li contents, up to 0.29 wt% Li2O, and can be …
WebJun 28, 2024 · The polyhedron distortions in tourmaline were detailed by , who noted that the Y site occupancy greatly influences the properties of the Z site with which it shares …
WebSep 1, 2012 · The existence of electric dipole moment suggests that polyhedra distortions occur in tourmaline, ... Therefore, the contraction of Y polyhedron will be associated with … bishop texas wikipediaWeb13.1 The atoms arrangements in quad and sodalite 13 Atomic Structures. KEY CONCEPTS. The development of X-ray diffraction techniques allowed mineralogists and chemists to directly investigating which nature of crystal structures. bishop texas trailersWebThe article Polyhedral Distortions in Tourmaline (A. Ertl, J. Hughes, et al., The Canadian Mineralogist, 2002: 153162) presents a model for calculating bond length distortion in … bishop texas police departmentWebThe Canadian Mineralogist 40, Part 1: 153-162 dark souls remastered new game plusWebAug 1, 2005 · The compositional zonation of both undeformed and plastically deformed tourmaline crystals from an amphibolite-facies mylonitic pegmatite from the Sierras Pampeanas (NW Argentina) bishop tgpss.comWebThe structures of four tourmalines with different Fe contents from Xinjiang, Sichuan and Yunnan provinces, China and one tourmaline from Yunnan province heat-treated for 48 h and 72 h were characterized at room temperature and -100 ℃ by single crys- tal X-ray diffraction The influences of temperature, content and valence of Fe on the polyhedron … dark souls remastered nightfallWebThe structure for the group is one in which SiO 4 tetrahedra are linked into six-membered rings having a hexagonal pattern and are stacked up with intervening distorted triangular BO 3 groups, linked by D site cations; the SiO 4 tetrahedra are linked vertically by G site cations and X site anions, while the columns are linked horizontally by ... bishop thanda zulu