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搜索结果: 1-11 共查到地质学 feldspars相关记录11条 . 查询时间(0.101 秒)
According to many publications, alkali feldspars are characterized by specific athermal (anomalous) fading of their thermoluminescence and optically-stimulated luminescence. This phenomenon is manifes...
Structuralandvolumecompressibilitydataforreedmergnerite,NaBSi O ,wereobtained3 8 bysingle-crystalX-raydiffractionatpressuresupto4.7GPa.Thebulkmoduluswas determinedtobe69.8(5)GPawiththepressurederiva...
Phosphorus and nitrogen are essential macronutrients necessary for the survival of vir-tually all living organisms. In groundwater systems, these nutrients can be quite scarce and can represent limiti...
AnexperimentalmethodforthedeterminationofAb-OrexsolutionandAl-Siordering inalkalifeldsparisdescribed.Powderinfraredspectroscopywasusedtomeasurespectra1 inthespectralrangebetween50and1500cm usingabo...
Orthoclase-richalkalifeldsparsintheLowerDevonianShapgranite,northwestEngland, containtwogenerationsofalbite-richfeldspar.Thesehavepartiallyreplacedearlierexso- lutionmicrotexturesconsistingofalbitel...
Enthalpies of solution have been measured at 50!a in 20.1 wt% hydrofluoric acid under isoperibolic conditions for a nine-member K-Na ion-exchange series based on a disordered oligoclase specimen con...
Ala~ge-s~ale computer. simulation ofAl-Siordering and the corresponding development ofa twm mIcrostructure malkali feldspars is reported for the first time. In the simulation the o~der-disorder transi...
Molecularorbitalcalculations onvariousaluminosilicate Q3T-OHandbridging0spe-cieswereperformed to modelatomic structural changesonmineralsurfacesthat occuras a function ofpH. Calculatedvibrational fre...
Thephonon spectra ofIR-active vibrations in alkalifeldspars havebeensystematically investigated in the spectral range 50-2000 cm-I attemperatures between20and 900K. SampleswithhighdegreesofAl-Siorderd...
Low albite and maximum microcline were the two feldspars identified in Coal Measures mudrocks. Standard feldspars were then used to spike a mudrock base to construct standard working curves based on X...
Abstract: The kaolinite crystallization by homogeneous precipitation with previous hydrolysis of the feldspars added has been followed by pH and potassium concentration measurements. The synthesized p...

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