搜索结果: 1-11 共查到“地质学 feldspars”相关记录11条 . 查询时间(0.147 秒)
Possible reasons for anomalous fading in alkali feldspars used for luminescence dating of Quaternary deposits
luminescence dating IR-OSL feldspars anomalous fading ionic processes
<
2009/10/21
According to many publications, alkali feldspars are characterized by specific athermal (anomalous) fading of their thermoluminescence and optically-stimulated luminescence. This phenomenon is manifes...
Compressibility mechanisms of alkali feldspars: New data from reedmergnerite
New data pressue reedmergnerite
<
2012/3/30
Structuralandvolumecompressibilitydataforreedmergnerite,NaBSi O ,wereobtained3 8
bysingle-crystalX-raydiffractionatpressuresupto4.7GPa.Thebulkmoduluswas
determinedtobe69.8(5)GPawiththepressurederiva...
Feldspars as a source of nutrients for microorganisms
Feldspars source of nutrients microorganisms
<
2012/4/1
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...
Exsolution and Al-Si disorder in alkali feldspars: Their analysis by infrared spectroscopy
Exsolution Al-Si disorder alkali feldspars analysis by infrared spectroscopy
<
2012/4/6
AnexperimentalmethodforthedeterminationofAb-OrexsolutionandAl-Siordering
inalkalifeldsparisdescribed.Powderinfraredspectroscopywasusedtomeasurespectra1
inthespectralrangebetween50and1500cm
usingabo...
Dislocation formation and albitization in alkali feldspars from the Shap granite
Dislocation formation albitization alkali feldspars Shap granite
<
2012/4/5
Orthoclase-richalkalifeldsparsintheLowerDevonianShapgranite,northwestEngland,
containtwogenerationsofalbite-richfeldspar.Thesehavepartiallyreplacedearlierexso-
lutionmicrotexturesconsistingofalbitel...
Hydrofluoric acid solution calorimetric investigation of the effects of anorthite component on enthalpies of K-Na mixing in feldspars
Hydrofluoric acid solution calorimetric investigation effects anorthite component on enthalpies K-Na mixing feldspars
<
2012/4/1
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...
Time evolution of pericline twin domains in alkali feldspars: A computer simulation study
Time evolution pericline twin domains alkali feldspars computer simulation study
<
2012/4/6
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...
Ab initio calculations on aluminosilicate Q3 species: Implications for atomic structures of mineral surfaces and dissolution mechanisms of feldspars
Ab calculations aluminosilicate Q3 species Implications for atomic structures dissolution mechanisms of feldspars
<
2012/4/6
Molecularorbitalcalculations onvariousaluminosilicate Q3T-OHandbridging0spe-cieswereperformed to modelatomic structural changesonmineralsurfacesthat occuras
a function ofpH. Calculatedvibrational fre...
Phonon-spectroscopy on alkali-feldspars: Phase transitions and solid solutions
Phonon-spectroscopy alkali-feldspars Phase transitions solid solutions
<
2012/4/5
Thephonon spectra ofIR-active vibrations in alkalifeldspars havebeensystematically investigated in the spectral range 50-2000 cm-I attemperatures between20and 900K. SampleswithhighdegreesofAl-Siorderd...
The Determination of Feldspars in Mudrocks Using an X-Ray Powder Diffraction Method
Albite Feldspar Microcline Mudrock Orthoclase Plagioclase
<
2012/2/10
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...
Kaolinite Crystallization at Room Temperature by Homogeneous Precipitation—III: Hydrolysis of Feldspars
Kaolinite Crystallization Homogeneous Precipitation Hydrolysis of Feldspars
<
2011/11/18
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...