理学 >>> 数学 信息科学与系统科学 物理学 化学 天文学 地球科学总论 大气科学 地球物理学 地理学 地质学 水文学 海洋科学 生物学 科学技术史
搜索结果: 1-15 共查到理学 X-ray powder diffraction相关记录29条 . 查询时间(0.093 秒)
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...
In this study, CaBPO5 was synthesized by different solid state reactions than reported before and its X-ray powder diffraction and IR data were reported. In one of these solid state reactions BPO4 was...
Thispaperpresentshigh-resolutionsynchrotronX-raypowderdiffractiondataat290K ontwoFe-bearing,polycrystallinesilicateperovskitesampleswithapproximatecompo- Fe )SiO synthesizedat25GPaand1920Kinamulti-a...
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...
Partialtransformationofmackinawitetogreigitewasalsoobservedusingtransmissionelectronmicroscopy(TEM)followinginsituheating.Electrondiffractionpatternsshowthat(001)ofmackinawiteisparallelto(001)ofgreigi...
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...
Abstract: The rehydration properties of Ca-, Mg-, Na-, and K-saturated homoionic beidellites after heating at various temperatures were compared with those of montmorillonites. The behavior of interla...
Recent data in the biological literature suggest that the natural zeolite erionite may be more tumorigenic than asbestos minerals. Because of its potential biological importance, a technique has been ...
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...
Hydrous phyllosilicate minerals exhibit many variations in unit-cell shape and symmetry, distortion due to cation ordering, polytypic repeats along Z, and lateral modulations that can affect the ease ...
The capabilities of X-ray powder diffraction (XRD), infrared absorption (IR), solid-state magic-angle-spinning nuclear magnetic resonance (MAS-NMR), and chemical dissolution methods were assessed for ...
Abstract: The < 0.1-&micro;m size fraction of an Ordovician K-bentonite from northern Kentucky was characterized by X-ray powder diffraction (XRD). Using A.I.P.E.A. criteria for interstratification no...
The heavy atom content and distribution in chlorite were estimated using the relative intensities of basal X-ray powder diffraction (XRD) peaks. For these peaks to be meaningful, however, corrections ...
X-ray powder diffraction (XRD) patterns for many interstratified mica/glycolated smectites were calculated by changing combinations of probabilities and transition probabilities of two-component layer...
An X-ray thermodifferential powder diffraction method for the quantitative determination of goethite and hematite in lateritic bauxites has been developed and consists of measuring the integrated inte...

中国研究生教育排行榜-

正在加载...

中国学术期刊排行榜-

正在加载...

世界大学科研机构排行榜-

正在加载...

中国大学排行榜-

正在加载...

人 物-

正在加载...

课 件-

正在加载...

视听资料-

正在加载...

研招资料 -

正在加载...

知识要闻-

正在加载...

国际动态-

正在加载...

会议中心-

正在加载...

学术指南-

正在加载...

学术站点-

正在加载...