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Electronic changes of iron- and metal free porphyrins are reviewed in light of their importance to modify the ferri/ferro reduction potential and energy dissipation between ligated carbon monoxide and...
The crystal structure of a synthetic NaAlSiO4 modification has been solved and refined to an R index of 0.020 for 2745 independent reflections. The compound is hexagonal with space group symmetry P 6 ...
Abstract: Hydrothermal treatment of aqueous mixtures of sodium hydroxide, copper chloride and excess sodium silicate (Si/Cu ≥ 2) at 150 °C produced blue powders. Scanning electron microscopy/energy di...
In the present study the effect of kinetin like synthetic hormone Polystimuline K (PS-K) on photosynthetic activity of salt stressed Trianea bogotensis Karst (Hydrocharitaceae) has been shown. Chlorop...
Liquid crystalline block and graft copolymers were synthesized according to the macroinitiator and macroinimer concept. For this purpose, side chain block copolymers (polytetrahydrofuran-b-polymethylm...
Abstract: A combined powder X-ray diffraction (XRD) and X-ray absorption (XAS) study of Fe(III) cation ordering within pyroaurite is described. It is concluded that there is no correlation between Fe(...
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...
SolutionchemicaltechniqueswereusedtostudytheconversionofsyntheticNa-richbuserite(NaBu)tohexagonal(H-exchanged)birnessite(HBi)atlowpH.Thelow-pH reactionisbroadlycharacterizedbytheexchangeofstructuralN...
Theenthalpyofdropsolutionofaquicklyquenched,clear,titaniteglasssampleandseveralsynthetic,polycrystalline,sampleswasmeasuredinaCalvet-typecalorimeterin2PbO!/ O solventat702C.Theenthalpyofformationofst...
Amphibolesweresynthesizedat750 C,1kbar(H O)forcompositionsat20%intervalsalongthejoinpotassium-richterite¤Ctremolite.Structuralvariations,siteoccupancies,an modalanalysesoftheexperimentalproducts(amph...
ThenewCrcontainingsilicatecompoundsBaCrSi O andSrCrSi O weresynthe-sizedbothfromalkali-borate?uxesandbyhigh-T subsolidussolid-statereactions.Thegillespite-typecrystalstructures(spacegroup P4/ncc,Z 4)w...
WeusedtheJUMBOmonochromatoratSSRLtomeasuretheAl K-edgeX-rayab- sorptionspectraofsyntheticmicashavingvariableAlcontentandoccupancy,from0to 2 intheoctahedralMpositions,and0to inthetetrahedralTposition...
Cathodoluminescence(CL)emissionspectraofforsteritefromtheAllende(CV3)and Murchison(C2)meteoritesandfromCr-dopedandpuresyntheticforsteritesampleshave beenobtainedatroom(296K)andliquidnitrogen(77K)tem...
Amphibolesweresynthesizedat750C,1kbar(H O)onthebinaryjoins(nickel, magnesium)-richteriteand(magnesium,cobalt)-richterite.Structuralvariationsandsiteoc- cupancieswerecharacterizedbyRietveldstructurer...
Aseriesofaluminoustremoliteswassynthesizedat800¤C85Cand6¤C13kbaralonthejoinCa Mg Si O (OH) -Ca (Mg Al)(AlSi )O (OH) bymeansoftheMg-Tscher- makssubstitution.Althoughtheamphiboleyieldswerehigh(97¤C99w...

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