搜索结果: 1-15 共查到“地质学 Rietveld”相关记录15条 . 查询时间(0.062 秒)
Rietveld refinement of the crystallographic structure of human dental enamel apatites
Rietveld refinement crystallographic structure human dental enamel apatites
2012/4/1
Rietveld refinements using 12 sets of X-ray diffraction powder data from milligram samples of
human dental enamel provide detailed information about the structure and composition of enamel
apatite. ...
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 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...
A Rietveld and infrared study of synthetic amphiboles along the potassium-richterite-tremolite join
Rietveld infrared study synthetic amphiboles potassium-richterite-tremolite join
2012/4/5
Amphibolesweresynthesizedat750 C,1kbar(H O)forcompositionsat20%intervalsalongthejoinpotassium-richterite¤Ctremolite.Structuralvariations,siteoccupancies,an
modalanalysesoftheexperimentalproducts(amph...
Thestructureofthehigh-pressurecubicdoubleperovskiteCa TiSiO wasre?nedusingsynchrotronX-raypowderdata[S.G. Fm3m,a 7.4105(1)A, Z 4].TiandSiarefullyorderedintoalternatingoctahedraintheperovskiteframework...
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...
Rietveld方法的R.A.Young程序的改进及其在矿物学中的应用
对话框 Windows 绿辉石
2010/12/16
Ｒｉｅｔｅｖｌｄ方法是采用粉末衍射进行晶体结构修正及解析的一种方法。Ｒｉｅｔｖｅｌｄ方法的代表软件是Ｒ．Ａ．Ｙｏｕｎｇ程序。该程序给用户使用的主要困难是由于其输入控制文件（ＩＣＦ），是一个严格格式化的文本文件，其次是在运行时受到常规内存的限制。本文介绍了用ＭｉｃｒｏｓｏｆｔＣ７．０及ＭｉｃｒｏｓｏｆｔＳＤＫ３．１对Ｒ．Ａ．Ｙｏｕｎｇ程序的改进，（１）用对话框输入各种控制参数，形成初始化文件（ＩＮＩ...
Quantitative analysis of alkali feldspar minerals using Rietveld refinement of X-ray diffraction data
Quantitative analysis alkali feldspar minerals X-ray diffraction data
2012/4/6
Microcline +albite and albite + quartz standard mixtures werequantitatively analyzed using Rietveld refinement to investigate the reliability of the method. The method was also applied to the determin...
Hydrogen positions and thermal expansion in lizardite-1T from Elba: A low-temperature study using Rietveld refinement of neutron diffraction data
Hydrogen positions thermal expansion lizardite-1T Elba low-temperature study neutron diffraction data
2012/4/6
Thestructure oflizardite-l Tfrom MonteFico,Elba,wasrefined in spacegroupP31m usingneutron diffractiondata, measuredat 8, 150,and 294K,and full-profile Rietveld
refinement techniques. Thelattice param...
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....
Rietveld Refinement of the Kaolinite Structure at 1.5 K
Crystal structure H positions Kaolinite Low temperature Neutron powder diffraction Rietveld refinement
2011/12/30
The crystal structure of Keokuk kaolinite, including all H atoms, was refined in space group C1 using low-temperature (1.5 K) neutron powder diffraction data (λ = 1.9102 Å) and Rietveld refineme...
Rietveld Refinement and Fourier-Transform Infrared Spectroscopic Study of the Dickite Structure at Low Temperature
Dickite FTIR Infrared spectroscopy Low temperature Neutron powder diffraction Rietveld refinement
2011/12/29
The full structure of dickite from St. Claire, Pennsylvania, including hydrogen atoms, was refined in space group Cc using time-of-flight neutron powder diffraction data obtained at 12 K and Rietveld ...
Application of Rietveld Refinement Techniques to a Disordered IIb Mg-Chamosite
Chlorite Disorder Rietveld refinement
2011/12/31
The structure of a disordered IIb Mg-chamosite was studied using Rietveld refinement techniques and powder X-ray diffraction (CuKα, 18–120° 2θ in 0.02° 2θ increments). The refinement in space group Cl...
X-ray Powder Diffraction Rietveld Characterization of Synthetic Aluminum-Substituted Goethite
Aluminum Crystallinity Goethite Rietveld refinement X-ray powder diffraction
2011/12/31
Rietveld X-ray powder diffraction (XRD) analysis has been evaluated as a procedure for characterizing Al-substituted goethite according to the Rietveld scale factor, unit-cell parameters, and atom pos...
Rietveld Refinement of Non-Hydrogen Atomic Positions in Kaolinite
Crystal structure Dickite Kaolinite Rietveld refinement X-ray powder diffraction
2012/1/5
The structure of kaolinite (non-hydrogen atoms only) from Keokuk, Iowa, was refined in space group C1 using CuKα X-ray powder diffraction data and Rietveld refinement techniques (Rwp = 12.3%). A dista...