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Crystal Structure Modeling of a Highly Disordered Potassium Birnessite
Birnessite Crystal Structure Modeling Turbostratic Stacking
2011/12/27
The structure of a highly disordered synthetic birnessite was studied by comparing powder X-ray diffraction (XRD) data with calculated patterns generated by BIRNDIF and WILDFIRE© in an attempt to...
Bottinoite, Ni(H2O)6[Sb(OH)6]2: Crystal structure, twinning, and hydrogen-bond model
Bottinoite Ni(H2O)6[Sb(OH)6]2 Crystal structure twinning hydrogen-bond model
2012/4/9
The crystal structure ofbottinoite, Ni(H20MSb(OH)6L, wasdetermined from a twinned crystal. This study revealed that the strong 31m pseudosymmetry shown by allthe natural and synthetic crystals examine...
Description and crystal structure of fianelite, Mn2V(V,As)O7?H2O, a new mineral from Fianel, Val Ferrera, Graub黱den, Switzerland
Description crystal structure fianelite Mn2V(V,As)O7?H2O, Fianel Val Ferrera Graub黱den Switzerland
2012/4/6
Fianelite occursin iron and manganeseores at Fianel, a small minein ValFerrera, Graubunden, Switzerland.Itis associatedwithquartz,aegirine,andlimonite in thin open fractures crosscutting quartz + rhod...
Laurelite: Its crystal structure and relationship to α-PbF2
Laurelite structure relationship α-PbF2
2012/4/9
Laurelite, Pb7F12CI2,from the Grand Reefmine, Graham County, Arizona, is hexagonal, Po,witha = 10.267(1) and c = 3.9844(4) Aand Z= 1.The crystal structure wassolved bydirect methods and refined to R =...
Medenbachite, Bi2Fe(Cu,Fe)(O,OH)2(OH)2(AsO4)2, a new mineral species: Its description and crystal structure
Medenbachite Bi2Fe(Cu,Fe)(O,OH)2(OH)2(AsO4)2 mineral species crystal structure
2012/4/5
Medenbachite occurs in association withmixite, preisingerite, alunite, goethite, reichen-bachite, and malachite in a silicified barite vein from Reichenbach near Bensheim, Oden-wald, Hesse, Germany. I...
Crystal structure of a P21/m ferromagnesian cummingtonite at 140 K
Crystal structure P21/m ferromagnesian cummingtonite
2012/4/5
Wereport a structure refinement ofaP2/m ferromagnesian cummingtonite crystal with Fe/(Mg + Fe)=0.37 at 140K;this crystal wasinverted from the C2/m structure, which is stable at room temperature. Theph...
The crystal structure of namuwite, a mineral with ZN in tetrahedral octahedral coordination, and its relationship to the synthetic basic zinc sulfates
The crystal structure of namuwite ZN coordination relationship synthetic basic zinc sulfates
2012/4/5
The crystal structure of namuwite, (Zn,Cu)4S04(OHk4H20, trigonal, a = 8.331(6), C = 10.54(1) A,V=634(1) A3,Pj, Z = 2, has been solved by direct methods and refined to an R index of 7.9% using MoKa X-r...
The crystal structure of nanpingite-2M2, the CS end-member of muscovite
crystal structure nanpingite-2M2 CS end-member of muscovite
2012/4/5
Nanpingite, ideally CsA12(AlSi3)OIO(OH)2,is a Csend-member dioctahedral mica,crys-tallizing in C21c,witha =9.076(3), b= 5.226(2), c =21.41(5) A,and (3
=99.48(6)°. The crystal structure of type nanpin...
Refinement of the Crystal Structure of Cronstedtite-3T
Cronstedtite Order-disorder (OD) Polytypism
2011/12/29
The crystal structure of cronstedtite-3T from Kutná Hora (Bohemia, Czechoslovakia), space group P31, was refined to Rw(all) = 3.1% for 1336 independent diffractions. There are two and three independen...
The Crystal Structure of Bannisterite
Bannisterite Interlayer cations Layer structure Modulated structure X-ray structure refinement
2011/12/30
The crystal structure of bannisterite, a modulated, mica-like mineral species, of general composition Ca0.5(K,Na)0.5(Mn,Fe,Mg,Zn)10(Si,Al)16O38(OH)8 · nH2O, has been solved and refined for specimens f...
The Effect of Mechanical Treatment on the Crystal Structure and Thermal Behavior of Kaolinite
Amorphization Crystal structure Grinding Kaolinite Mechanochemistry Thermal behavior
2011/12/30
The destruction of the crystal structure of kaolinite caused by mechanical forces was investigated by X-ray diffraction, thermal analysis, infrared spectroscopy, and specific surface area determinatio...
Effects of Dry Grinding and Leaching on the Crystal Structure of Chrysotile
Acid leaching Asbestos Chrysotile Dry grinding Infrared spectroscopy Thermal gravimetric analysis Transmission electron microscopy
2012/1/6
The structural damage produced by dry grinding and acid leaching of chrysotile was studied by transmission and scanning electron microscopy, infrared spectroscopy, X-ray powder diffraction, and thermo...
Verification of the Triclinic Crystal Structure of Kaolinite
Inner hydroxyl Kaolinite Neutron powder diffraction Rietveld structure refinement Tri-clinicity
2012/1/9
On the basis of neutron diffraction studies, the two inner-hydroxyl ions in highly ordered kaolinite were recently shown to be differently oriented. One of the inner-hydroxyl ions points generally tow...
Crystal Structure of a Vermiculite-Anilinium Intercalate
Anilinium ion Crystal structure Intercalate Ordering Vermiculite
2012/1/10
If anilinium ions are intercalated into Llano vermiculite, the stacking order of adjacent silicate layers is increased, resulting in a relatively sharp single crystal X-ray diffraction (XRD) pattern. ...
Refinement of the Crystal Structure of a Monoclinic Ferroan Clinochlore
Charge balance Chlorite Clinochlore Crystal structure Order-disorder
2012/1/10
A monoclinic IIb-2 clinochlore from Washington, D.C., contrary to previous studies, is primarily a ferroan rather than a ferrian chlorite. Disorder of tetrahedral Si,Al cations is indicated because of...