957 resultados para ZnGeP2:Mn
Resumo:
In griech. Schr.
Resumo:
A natural smoky quartz crystal from Shandong province, China, was characterised by laser ablation ICP-MS, electron probe microanalysis (EPMA) and solution ICP-MS to determine the concentration of twenty-four trace and ultra trace elements. Our main focus was on Ti quantification because of the increased use of this element for titanium in- quartz (TitaniQ) thermobarometry. Pieces of a uniform growth zone of 9 mm thickness within the quartz crystal were analysed in four different LA-ICP-MS laboratories, three EPMA laboratories and one solution-ICP-MS laboratory. The results reveal reproducible concentrations of Ti (57 ± 4 lg g-1),Al (154 ± 15 lg g-1), Li (30 ± 2 lg g-1), Fe (2.2 ± 0.3 lg g-1), Mn (0.34 ± 0.04 lg g-1), Ge (1.7 ± 0.2 lg g-1) and Ga (0.020 ± 0.002 lg g-1) and detectable, but less reproducible, concentrations of Be, B, Na, Cu, Zr, Sn and Pb. oncentrations of K, Ca, Sr, Mo, Ag, Sb, Ba and Au were below the limits of detection of all three techniques. The uncertainties on the average concentration determinations by multiple techniques and laboratories for Ti, Al, Li, Fe, Mn, Ga and Ge are low; hence, this quartz can serve as a reference material or a secondary reference material for microanalytical applications involving the quantification of trace elements in quartz.
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[Isaak aus Tyrnau]
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[Isaak aus Tyrnau]
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Digitalisat der Ausg. Ofenbach, [i.e. circa 1810]
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Digitalisat der Ausg. Ofenbach, [1811/12]
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Digitalisat der Ausg. Rödelheim, 1800
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[Isaak Ben-Salomon Ibn-Abi-Sahula]
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Digitalisat der Ausg. Fjurda, [1778/79]
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der meḥaber izṭ gwezn ... Seril bas ... Jaakov mi-Dubno ... oif loišn ha-koideš und ṭaiṭš
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[Eliezer Liebermann Sofer Ben-Jehuda Loeb]
Resumo:
[Isaak aus Tyrnau]
