نتایج جستجو برای: rietveld refinement method

تعداد نتایج: 1655495  

2004
D. E. Simon

Electrolytic Manganese Dioxide (EMD) material was analyzed by Rietveld refinement of x-ray diffraction patterns to answer the question, “Is EMD composed of gammaor epsilon-MnO2?” An electron diffraction study of EMD using a 20 nanometer spot size electron beam reported observing only the ε-MnO2 structure and no γ-MnO2 structure. However, a Transmission Electron Microscopy (TEM) study of EMD obs...

2015
S. M. Morrison K. V. Fendrich A. S. Yen J. Grotzinger J. A. Crisp T. F. Bristow P. C. Sarrazin J. D. Farmer D. J. Des Ma M. A. Wilson N. Spanovich R. C. Anderson

Introduction: The Mars Science Laboratory (MSL) rover Curiosity recently completed its fourth drill sampling of sediments on Mars. The Confidence Hills (CH) sample was drilled from a rock located in the Pahrump Hills region at the base of Mt. Sharp in Gale Crater. The CheMin X-ray diffractometer completed five nights of analysis on the sample, more than previously executed for a drill sample, a...

Journal: :Acta Crystallographica Section C Crystal Structure Communications 1994

Journal: :Dalton transactions 2014
Peng Guo Leifeng Liu Yifeng Yun Jie Su Wei Wan Hermann Gies Haiyan Zhang Feng-Shou Xiao Xiaodong Zou

Layered solids often form thin plate-like crystals that are too small to be studied by single-crystal X-ray diffraction. Although powder X-ray diffraction (PXRD) is the conventional method for studying such solids, it has limitations because of peak broadening and peak overlapping. We have recently developed a software-based rotation electron diffraction (RED) method for automated collection an...

Journal: :Acta Crystallographica Section E Crystallographic Communications 2018

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