Spinel-structured oxides (hereafter referred to as ‘spinels’) are a group of nominally anhydrous minerals characterized by a wide range of solid solutions. To allow the analysis of hydrogen in spinels by secondary ion mass spectrometry, Relative Sensitivity Factors (RSFs), which are typically matrix-dependent, need to be determined. Anticipating analysis of the OH- dimer rather than the H+ monomer, we present here RSF values of 16O2H relative to 18O for five natural spinels, including franklinite, Fe-bearing spinel, Mg-chromite, magnetite, and jacobsite. The Al2O3 content in the matrix of these crystals ranged from 0.09 wt% to 67.54 wt%. Our data indicate increasing RSF values with increasing Al2O3 content, from 2.76 x 10^20 to 2.72 x 10^21 atoms per cm3, with an RSD for two repeat analyses of about 4.3%. The increase of RSF with Al2O3 follows a second order polynomial form: RSF = 2.27x10^17 Al2O3^2 + 2.05 x10^19 Al2O3 + 3.02 x10^20. Further analyses at other instruments under different analytical conditions will be required to understand how robust the accuracy of these data can be considered. Expanded analyses of the here presented spinels, including depth-profiling, are reported in Zellmer et al. (2025).
Versorgungsgrad (qm pro Einwohner) von Wohnblöcken mit öffentlichen, wohnungsnahen Grünanlagen unter Berücksichtigung vorhandener privater und halböffentlicher Freiräume, Sachstand 2016
Versorgungsgrad (qm pro Einwohner) von Wohnblöcken mit öffentlichen, wohnungsnahen Grünanlagen unter Berücksichtigung vorhandener privater und halböffentlicher Freiräume, Sachstand 2020
Pflanzjahr: Frühjahr 1998; Sorten-Unterlagenkombinationen: Bergeron auf Torinel und INRA 655-2 Goldrich auf Torinel und INRA 655-2 Klosterneuburger auf Torinel und INRA 2; Erziehungssysteme: Spindel (4 x 2m) und Schräge Hecke (4 x 4m); Mit diesem Versuch soll getestet werden ob eine Folienüberdachung ausreicht um Moniliaspitzendürreinfektionen zu verhindern. Die Produktion erfolgt gemäß den Richtlinien biologischen Anbaus. Der Einfluss der Überdachung auf den Temperaturverlauf in der Anlage, auf die Fruchtqualität und das Ertragsverhalten wird ebenfalls untersucht.
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The qualitative and quantitative phase analyses were performed in the KTB field laboratory by x-ray powder diffraction using SIEMENS D 500 diffractometer. During early stages of the KTB project a new method for quantitative phase analysis was developed (see references below). The method is based on the comparison of the diffraction spectrum of the unknown sample with those of pure minerals. The powder diffraction data of the minerals are stored in a database built up of 250 natural minerals separated from various types of igneous and metamorphic rocks. The complete analyses (radiation: Cu K alpha, lambda: 1,5405Å, stepwidth: 0,01°, counting time 2 sec/step, angle 2-80°) was carried out automatically including computations. The results of this quantitative phase analysis were used e.g. to check thin section petrography (and vice versa) and to construct a \"mineralogical rock composition log\".
The qualitative and quantitative phase analyses were performed in the KTB field laboratory by x-ray powder diffraction using SIEMENS D 500 diffractometer. During early stages of the KTB project a new method for quantitative phase analysis was developed (see references below). The method is based on the comparison of the diffraction spectrum of the unknown sample with those of pure minerals. The powder diffraction data of the minerals are stored in a database built up of 250 natural minerals separated from various types of igneous and metamorphic rocks. The complete analyses (radiation: Cu K alpha, lambda: 1,5405Å, stepwidth: 0,01°, counting time 2 sec/step, angle 2-80°) was carried out automatically including computations. The results of this quantitative phase analysis were used e.g. to check thin section petrography (and vice versa) and to construct a \"mineralogical rock composition log\".
The qualitative and quantitative phase analyses were performed in the KTB field laboratory by x-ray powder diffraction using SIEMENS D 500 diffractometer. During early stages of the KTB project a new method for quantitative phase analysis was developed (see references below). The method is based on the comparison of the diffraction spectrum of the unknown sample with those of pure minerals. The powder diffraction data of the minerals are stored in a database built up of 250 natural minerals separated from various types of igneous and metamorphic rocks. The complete analyses (radiation: Cu K alpha, lambda: 1,5405Å, stepwidth: 0,01°, counting time 2 sec/step, angle 2-80°) was carried out automatically including computations. The results of this quantitative phase analysis were used e.g. to check thin section petrography (and vice versa) and to construct a \"mineralogical rock composition log\".
The qualitative and quantitative phase analyses were performed in the KTB field laboratory by x-ray powder diffraction using SIEMENS D 500 diffractometer. During early stages of the KTB project a new method for quantitative phase analysis was developed (see references below). The method is based on the comparison of the diffraction spectrum of the unknown sample with those of pure minerals. The powder diffraction data of the minerals are stored in a database built up of 250 natural minerals separated from various types of igneous and metamorphic rocks. The complete analyses (radiation: Cu K alpha, lambda: 1,5405Å, stepwidth: 0,01°, counting time 2 sec/step, angle 2-80°) was carried out automatically including computations. The results of this quantitative phase analysis were used e.g. to check thin section petrography (and vice versa) and to construct a \"mineralogical rock composition log\".
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