15.A STUDY OF ELEMENTAL CONCENTRATIONS IN ATMOSPHERIC AEROSOL FROM BEIJING IN LATE WINTER北京冬春季节大气气溶胶化学成份的研究 16.A STUDY ON THE CHEMICAL COMPOSITION OF JADEITE, RELATIVE PYROXENE AND CLASSIFICATION OF JADE硬玉及相关辉石化学成份与翡翠玉种研究 17.Study on Chemical Constituents of Fatty ...
Jadeite was synthesized from its glass of stoichiometric composition NaAlSi2O6, and a colouring agent Cr2O3 (0.3–0.6 wt%) was added to achieve the emerald colour. The conditions employed were a pressure range of 3.0–5.0 GPa and a temperature range of 1150–1750 °C, for periods of 1–...
(Chapter2.01). This chapter attempts to link these two areas by tracking the composition of the mantle through time. The first part of this chapter is a summary of the empirical evidence for secular change in the chemical composition of the mantle from the formation of the Earth at 4.56Ga ...
31,33,34,35,36,37,38on simple or industrial glasses for nuclear waste disposal such as Magnox (UK) and AVM (France) glasses, there is a limited amount of data on the impact of magnesium as part of the composition on the initial dissolution rate10,21,38,39of such glasses....
When we are dealing with stoichiometric phases this can also be written in terms of chemical potentials. For instance, if we take albite into the stability field of jadeite and quartz then we would have A = μalb − μjd − μq. In stressed systems referring to μ and A rather...
The Ba content in the residual fluids would increase locally during the formation of jadeite because Ba is incompatible with clinopyroxene. This study supports the suggestion that Ba-rich minerals are not uncommon in jadeitites and albitites/metasomatized rocks that occur as tectonic blocks in serp...
The garnet has a compositional range from Al 56.9Gr + An 24.6Py 18.5 to Al 41.5Gr + An 28.1Py 30.4 to Al 40.3Gr + An 22.6Py 37.1 (where Al = almandine, Gr+An = grossular+andradite, and Py = Pyrope) and the pyroxene has jadeite and acmite components of up to 26.0 and 9.9%, ...
As the volume effects of typical K-jadeite-forming reactions are negative, the incorporation of K in the clinopyroxene structure becomes less difficult at higher pressure. Atomistic simulations predict that the thermodynamic mixing properties of diopside–K-jadeite solid-solutions at high temperature ...
glasses in the field of diopside crystalline materials have been systematically designed by varying the chemical composition of glass to achieve desired combination of functional properties for the rigid and SH GC layers. The glass Sr-0.3 where Sr replaced 30 % of Ca was revealed as a highly ...
The observed variations in the pebbles are shown to be functions of: (1) bulk chemistry; (2) the igneous mineral assemblage; (3) the stable metamorphic mineral assemblage; and (4) the composition of pore fluids in the conglomerates. The relative proportions of Mg and Fe in most of the ...