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Crystal structure of monoclinic hydrous wadsleyite [β-(Mg,Fe)2SiO4]
Crystal structure monoclinic hydrous wadsleyite [β-(Mg,Fe)2SiO4]
2012/4/5
Wadsleyite[-(Mg,Fe) SiO ]isknowntoacceptvariableamountsofHandmaybean
importantreservoirofHinthetransitionzoneofthemantle.ThecrystalstructureofFo
hydrouswadsleyite(Mg Fe Al Si H O )synthesizedat1400C...
Structure of synthetic Li2(Mg,Cu)Cu2[Si2O6]2: A unique chain silicate related to pyroxene
Structure synthetic Li2(Mg,Cu)Cu2[Si2O6]2 unique chain silicate pyroxene
2012/4/1
A unique Cu-bearing chain silicate, Li2(Mg,Cu)Cuz[Si206b was synthesized, and the
structure was determined by single-cry~tal X-ray diffraction techniques. The structure was5.7068(7), b =
found to be...
The structural and elastic properties of MgO periclase were studied up to 150 OPa with
the first-principles pseudopotential method within the local density approximation. The
calculated lattice cons...
Submicroscopic Structure of Fe-Coatings on Quartz Grains in Tropical Environments
Electron Microscopy Fe-coating Fe-nodules Fe-oxide Forms Submicroscopic Structure Ultrathin Sections X-ray Microprobe Analysis
2011/12/27
Formation of Fe-coatings or segregation at the expense of quartz grains is a common process in the tropical environment. Limited information is available about their internal structure at the submicro...
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...
TEM investigation of the domain structure and superstructure in hillebrandite, Ca2SiO3(OH)2
TEM investigation domain structure superstructure hillebrandite Ca2SiO3(OH)2
2012/4/9
Selected-area electron diffraction, dark-field images, and high-resolution transmission electron microscope images show that there are pervasive domains in hillebrandite from Mexico. The domains are i...
The structure of ordered and disordered lead feldspar (PbAl2Si2O8)
The structure lead feldspar (PbAl2Si2O8)
2012/4/9
The Al-Si configuration in ordered and disordered lead feldspar (PbA12Si20g) has been investigated by single-crystal X-ray diffraction, Single crystals synthesized from meltand cooled from T= 1280to 1...
The electronic structure of hematite {001} surfaces: Applications to the interpretation of STM images and heterogeneous surface reactions
electronic structure hematite {001} surfaces Applications interpretation STM images heterogeneous surface reactions
2012/4/9
Scanning tunneling microscope (STM) images and scanning tunneling spectroscopy (STS) spectra of hematite (a-Fe203) surfaces werecalculated using ab-initio methods, not only to interpret experimentally...
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...
X-ray structure refinements of tremolite at 140 and 295 K: Crystal chemistry and petrologic implications
X-ray structure refinements tremolite chemistry petrologic implications
2012/4/6
Anear-end-member natural tremolite, N!lo.o,Ca1.97M~.9sFeo.Q3Alo.oISis.oo022(OH)2' was studied bysingle-crystal X-raydiffraction at 140and 295Kto seek a possible crystal-chemicalexplanation for the typ...
Prediction of phase transition in CaSiO3 perovskite and implications for lower mantle structure
Prediction phase transition CaSiO3 perovskite implications mantle structure
2012/4/6
First-principleslinear-response calculations wereusedto investigate the lattice dynamics ofwhatis thought to be the third mostabundant phase in the lower mantle,CaSi03 perovskite.Thecommonly assumed c...
Orthopyroxene from the Serra de Magé meteorite: A structure-refinement procedure for a Pbca phase coexisting with a C2/c exsolved phase
Orthopyroxene Serra de Magé meteorite structure-refinement procedure Pbca phase coexisting C2/c exsolved phase
2012/4/6
AnX-ray structure-refinement procedure wasdeveloped to characterize orthopyroxene from the Serra de Magemeteorite. In the studied sample, the orthorhombic phase coexists with exsolution lamellae of C2...
Effects of temperature and pressure on the structure of lawsonite
temperature pressure structure of lawsonite
2012/4/6
Independent isobaric data on thermal expansion and isothermal compressibility data for lawsonite, CaA12Si207(OHh. H20, weredetermined between 23and 598°C and 0.001 and 37.7 kbar using single-crystal X...
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 =...