搜索结果: 1-15 共查到“地质学 powder diffraction”相关记录38条 . 查询时间(0.051 秒)
A combined synchrotron powder diffraction and vibrational study of the thermal treatment of palygorskite-indigo to produce Maya blue
synchrotron powder diffraction palygorskite-indigo Maya blue
2011/11/11
The heating process (30-200 QC) of a palygorskite-indigo mixture has been monitored in situ and simultaneously by synchrotron powder diffraction and Raman spectroscopy. During this process, the dye an...
In-Situ Identification of Palygorskite in Maya Blue Samples Using X-Ray Powder Diffraction
Palygorskite X-Ray Powder Diffraction Maya Blue Samples
2011/11/4
In spite of the abundance of colors found in the murals and other objects that correspond to the Classic Mayan period (600-900 A.D.), a peculiar hue captured the interest of researchers. The most well...
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...
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...
Dehydration dynamics of analcime by in situ synchrotron powder diffraction
Dehydration dynamics of analcime powder diffraction
2012/3/30
Thecontinuousstructuraltransformationoftetragonalanalcime(Na Al Si
15.87 15.20 32.64
O !/16.3 O)upondehydrationwasstudied,usingRietveldstructureanalysisoftemper-96 2
ature-resolvedpowderdiffraction...
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...
Dehydration dynamics of stilbite using synchrotron X-ray powder diffraction
Dehydration dynamics stilbite synchrotron X-ray powder diffraction
2012/4/5
Thecontinuousstructuraltransformationofthenaturalzeolitestilbite(NaK Ba Ca Sr Mg [Fe Al Si O ]!/60 O)upondehydrationhasbeen
3.62 0.44 0.03 6.32 0.28 0.04 17.33 54.64 144 2studiedusingRietveldstructur...
Transformation of mackinawite to greigite: An in situ X-ray powder diffraction and transmission electron microscope study
Transformation mackinawite to greigite X-ray powder diffraction transmission electron microscope study
2012/4/5
Partialtransformationofmackinawitetogreigitewasalsoobservedusingtransmissionelectronmicroscopy(TEM)followinginsituheating.Electrondiffractionpatternsshowthat(001)ofmackinawiteisparallelto(001)ofgreigi...
Neutron powder diffraction study of hydrogarnet to 9.0 GPa
Neutron powder diffraction study of hydrogarnet 9.0 GPa
2012/4/1
cell parameter at each pressure (5.7-42.3 GPa) was calculated
from the positions of four reflections (321, 400, 420, and 521)
fit by pure Gaussian profiles. With the assumption that the pres-
sure ...
Structural behavior, crystal chemistry, and phase transitions in substituted leucite: High-resolution neutron powder diffraction studies
Structural behavior crystal chemistry phase transitions substituted leucite High-resolution neutron powder diffraction studies
2012/4/1
High-resolution neutron powder diffraction was used to study phase transitions in theleucite phases of KAlSi206, RbAlSi20", CsAlSi206, and KFeSi206. Thetemperature-depen-dent structural behavior invol...
Neutron powder diffraction study of hydrogarnet to 9.0 Gpa
Neutron powder hydrogarnet 9.0 Gpa
2012/4/6
The crystal structure of synthetic, deuterated katoite [Ca3A12(0.D.)3] has been refined at 0.0001,0.78,3.6,6.1,7.9, and 9.0 GPa using the opposed-anvil Paris-Edinburgh cell and the POLARIS powder diff...
Thermal expansion of gypsum investigated by neutron powder diffraction
Thermal expansion gypsum investigated neutron powder diffraction
2012/4/6
The cell parameters of deuterated gypsum have been extracted from Rietveld anal-ysis of powder neutron diffraction data within the temperature range 4.2-320 K.The thermal expansion of gypsum is highly...
Mn crystal chemistry in pumpellyite: A resonant scattering powder diffraction Rietveld study using synchrotron radiation
Mn crystal chemistry pumpellyite scattering powder diffraction synchrotron radiation
2012/4/5
The present study attempts to clarify the structural role of Mnin two pumpellyite specimens with the chemical formulas Ca7.so(Als.91Mn1.85Mg1.16Feo.37)Sill.s40s6-xOHx and Cas.12(AI7.99Mn3.41Mgo.71Feo....
A synchrotron radiation, HRTEM, X-ray powder diffraction, and Raman spectroscopic study of malayaite, CaSnSiO5
synchrotron radiation HRTEM X-ray powder diffraction Raman spectroscopic study malayaite CaSnSiO5
2012/4/5
Synchrotron radiation, high-resolution transmission electron microscopy (HRTEM),X-ray powder diffraction, and Raman spectroscopy wereused to study the structure and thermal behavior of malayaite, CaSn...
Nature of Structural Disorder in Natural Kaolinites: A New Model Based on Computer Simulation of Powder Diffraction Data and Electrostatic Energy Calculation
Energy calculation Kaolinite Layer disorder XRPD simulation
2011/12/28
A new model for the description of the structural disorder in natural kaolinite materials is proposed, based on the stacking of two 1:1 layers and their enantiomorphs, and encompassing previously prop...