搜索结果: 1-12 共查到“矿床学与矿相学 Structure refinement”相关记录12条 . 查询时间(0.05 秒)
Crystal structure refinement of a sepiolite/indigo Maya Blue pigment using molecular modelling and synchrotron diffraction
sepiolite indigo Maya Blue pigment molecular mechanics Rietveld method
2011/11/7
Maya Blue is an artificial pigment used in Pre-Columbian America, renowned for its chemical stability. The pigment can be considered a precursor of modern inclusion compounds as a hosting microporous ...
Crystal structure refinement of palygorskite from neutron powder diffraction
palygorskite structure neutron powder refinement zeolitic water clay mineral
2011/11/4
Palygorskite is a Mg-rich fibrous clay, present in nature as a mixture of two intricately intertwined polymorphs –monoclinic (C2/m) and orthorhombic (Pbmn) –characterized by the presence of channels a...
Single-crystal structure refinement of synthetic M4K-substituted potassic richterite K(KCa)Mg5Si8O22(OH)2
Single-crystal structure refinement M4 potassic richterite
2012/3/31
The crystal structure of a potassic richterite, K(KCa)Mg Si O (OH) synthesized at 15 GPa and
1400 ?C, was refined from single-crystal X-ray diffraction data. The unit-cell parameters are: a =
10.192...
High-resolution synchrotron X-ray powder diffraction and Rietveld structure refinement of two (Mg0.95,Fe0.05)SiO3 perovskite samples synthesized under different oxygen fugacity conditions
high-resolution synchrotron X-ray powder diffraction
2012/3/30
Thispaperpresentshigh-resolutionsynchrotronX-raypowderdiffractiondataat290K
ontwoFe-bearing,polycrystallinesilicateperovskitesampleswithapproximatecompo-
Fe )SiO synthesizedat25GPaand1920Kinamulti-a...
Structure refinement of birefringent Cr-bearing majorite Mg3(Mg0.34Si0.34Al0.18Cr0.14)2Si3O12
Mg3(Mg0.34Si0.34Al0.18Cr0.14)2Si3O12 Crions
2012/3/30
A single crystal of a birefringent Cr-bearing majorite, Mg (Mg Si Al Cr ) Si O , was
3 0.34 0.34 0.18 0.14 2 3 12
synthesized at 20 GPa and 2000 oC using °∞6(R)C8°± type uniaxial split-sphere appara...
Structure Refinement of Synthetic Deuterated Kaolinite by Rietveld Analysis Using Time-of-Flight Neutron Powder Diffraction Data
Crystal Structure Kaolinite Neutron Powder Diffraction Rietveld Refinement Synthetic Kaolinite
2011/12/22
Abstract: The crystal structure of synthetic deuterated kaolinite was refined by Rietveld analysis using time-of-flight (TOF) neutron powder diffraction data. For non-hydrogen atoms, C1 symmetry was a...
Crystal structure refinement of aluminian lizardite-2H2
Crysta structure refinement aluminian lizardite-2H2
2012/4/6
Well-crystallizedeuhedralcrystalsofaluminianlizardite-2H (MgFeFeAl)2 2.350.060.070.52werefoundnearSchio(Vicenza,Italy).Togaininsightintotherole(SiAl)O(OH)
1.410.595.004.00ofahighAlcontentlizardite,ch...
Crystal Structure Refinement and Mossbauer Spectroscopy of an Ordered, Triclinic Clinochlore
Cation Ordering Chlorite Clinochlore Crystal Structure Mossbauer
2011/12/22
Abstract: The crystal structure of a natural, ordered IIb-4 triclinic clinochlore has been refined in space group C1¯ from 4282 unique X-ray intensity measurements of which 3833 are greater than ...
Site occupancies in synthetic monoclinic amphiboles: Rietveld structure refinement and infrared spectroscopy of (nickel, magnesium, cobalt)-richterite
Site occupancies synthetic monoclinic amphiboles Rietveld structure refinement infrared spectroscopy nickel magnesium cobalt richterite
2012/4/5
Amphibolesweresynthesizedat750C,1kbar(H O)onthebinaryjoins(nickel,
magnesium)-richteriteand(magnesium,cobalt)-richterite.Structuralvariationsandsiteoc-
cupancieswerecharacterizedbyRietveldstructurer...
Orthopyroxene from the Serra de Magé meteorite: A structure-refinement procedure for a Pbca phase coexisting with a C2/c exsolved phase
Orthopyroxene Serra de Magé meteorite structure-refinement procedure Pbca phase coexisting C2/c exsolved phase
2012/4/6
AnX-ray structure-refinement procedure wasdeveloped to characterize orthopyroxene from the Serra de Magemeteorite. In the studied sample, the orthorhombic phase coexists with exsolution lamellae of C2...
Structure refinement of a natural K-rich diopside: The effect of K on the average structure
Structure refinement natural K-rich diopside K average structure
2012/4/6
The crystal structure of the most K-rich natural pyroxene ever reported, a chromian diopside with1.5wt%K20,has been refined (diffractometer data, filtered MoKaradiation, by least-squares using XTAL to...
Structure Refinement of Deuterated Boehmite
Boehmite Crystal structure Deuterium Hydrogen position Neutron diffraction Rietveld refinement
2011/11/25
Abstract: The crystal structure of a deuterated synthetic boehmite powder, 兞-AlOOD, has been determined by time-of-flight neutron diffraction and Rietveld profile refinement in space group Cmcm to a w...