Strontium content

Strontium-gehalt, m. strontium content, -jodid, n. strontium iodide, -oxydhydrat, n. strontium hydroxide, -salpeter, m. strontium nitrate, -salz, n. strontium salt, -was-serstoff, m. strontium hydride. 

Brown, A.B. 1973 Bone Strontium Content as a Dietary Indicator in Human Skeletal Populations. Ph.D. dissertation, University of Michigan, Ann Arbor. 

Hodges, R.M., MacDonald, N.S., Nusbaum, R., Steams, R., Ezmirlian, F., Spain, P. and MeArthur, C. 1950 The strontium content of human bone. Journal of Biological Chemistry 185 519-524. 

Rosenthal, H.L., Chochran, O.A. and Eves, M.M. 1972 Strontium content of mammalian bone, diet, and excreta. Environmental Research 5 182-191. 

Turekian, K.K. and Kulp, XL. 1956 Strontium content of human Bones. Science 124 405 107. Wasserman, R. and Comar, C.L. 1956 Carbohydrates and gastrointestinal absorption ofradiostron-tium and radiocalcium in the rat Proceedings of the Society for Experimental Biological Medicine 101 314-317. 

Wolf, N., Gedalia, I., Yariv, S. and Zuckermann, H. 1973 The strontium content ofbones and teeth of human foetuses. Archives of Oral Biology 18 233-238. 

Figure 1.19. Strontium contents of anhydrites from the Matsumine, Shakanai, and Fukazawa deposits (Shika-zono et al., 1983).

Figure 1.48. Change in the strontium content of anhydrite precipitated during the heating of normal seawater without any seawater-rock interaction (Shikazono et ah, 1983).

Figure 1.49. Change of the strontium content and Sr/ Sr ratio of Kuroko anhydrite during the deposition and dissolution due to the mixing of hot ascending solution and cold solution (normal seawater) (Shikazono et al., 1983). R mixing ratio (in weight) = S.W./(S.W.+H.S.) in which S.W. and H.S. are seawater and hydrothermal solution, respectively. Open triangle Fukazawa deposits. Solid triangle Hanawa deposits. Open square Wanibuchi deposits. Solid square Shakanai deposits. Concentration of Ca, Sr " " and SO of H.S. are assumed to be 1,(XX) ppm, 1 ppm, and 10 mol/kg H2O, respectively. Concentrations of Ca, Sr " and SO of S.W. are taken to be 412 ppm, 8 ppm, and 2,712 ppm. Temperatures of H.S. and S.W. are assumed to be 350°C and 5°C (Shikazono et al., 1983).

Which of these possibilities is preferred can be answered by experiment. A plot of the strontium content, x, in Lai - Sr CoOs-s, versus the oxygen content, 3 8, for the two possibilities, Vo or Co 0, can be drawn and compared with experimental measurements, which show that both defect types are present with vacancies dominating (Fig. 8.15). The material is a mixed conductor. 

Elemental composition Sr 72.03%, 0 26.31%, H 1.66%. The aqueous solution may be analyzed to measure strontium content. Basic strength (concentration of the OH ) may be determined by acid-base titration. 

The starting material for water-soluble barium compounds is fused barium sulfide produced by coke reduction of naturally occurring barite with a low silica and strontium content. Suitable barite is readily available from many deposits worldwide. 

The dielectric permittivity ofBST films (measured at the frequency of 1 MHz at 20°C without application of bias electric field) as a function of the strontium content in the films is shown in Fig. 102. The maximum value of dielectric permittivity is observed for the films with Ba/(Ba+Sr) = 0.3 in accordance with single-crystal behavior. The values of dielectric permittivity increase with the increase of annealing temperature of the films (from 700 to 800°C), as well as with the increase of film thickness. 

Manghnani M.H., Schlanger S.O. and Milholland P.D. (1980) Elastic properties related to depth of burial, strontium content and age, and diagenetic stage in pelagic carbonate sediments. In Bottom Interacting Ocean Acoustics (eds. W.A. Kupferman and F.D. Jensen), pp. . Plenum Press, New York. 

Schifano G. and Censi P. (1986) Oxygen and carbon iosotope composition, magnesium and strontium contents of calcite from a subtidal patella coerulea shell. Chem. Geol. 58, 325-331. 

Figure 13 Plot providing the superconducting transition temperature versus the strontium content x of the compound La2 j Stj Cu4 y. The region of antiferromagnetic behavior is also indicated. (Ref. 13, with kind permission of Springer Science Business Media)...

Most apatites are chlorine-rich (2-4.3%) with low F/Cl (0.1 -0.3). High fluorine ( 5%) and low chlorine (—0.25%) have been reported for apatite in spinel Iherzolites from Pacific OIB (Hauri et al., 1993). Extremely high strontium contents, commonly >2X10 ppm and up to 7 wt.% (Ionov et al., 1997 Table 9) are common in mantle apatites meaning that this phase is a major repository for strontium when present in peridotites at abundances of 0.1% or above. Rb/Sr is very low. Apatites have high levels of REE and are LREE-enriched (Table 9). Lanthanum and cerium concentrations can reach >1 wt.% and neodymium concentrations can be above 1,000 ppm. Sm/Nd is below PUM. HFSE are low and so the presence of this phase does not affect bulk rock HFSE chemistry. 

A group of peraluminous leucogranite plutons with low K/Na ratios and unusually elevated strontium contents (250-450 ppm) occur in the Glenelg River Complex of southeastern Australia (Kemp and Gray, 1999 Kemp et al., 2002). These contrast strongly with the predominant low-strontium leucogranite variety discussed above (see Table 3) and thus warrant further examination here. 

This further emphasizes the importance of sedimentary processes in the development of such fractionated Rb/Sr and Eu/Sr ratios. Second, in the context of the LFB, the Ordovician turbidites have progressively lower Eu/Sr ratios than the feldspathic Cambrian sediments from which they were partly derived. Thus, it also appears that the displacement to higher Eu/Sr is linked to the number of weathering and erosion cycles involved in the formation of particular sedimentary rock suites. In the examples in Figure 20, the reduction in strontium content for the most evolved Ordovician sediments is nearly 10-fold, and this clearly results in an associated increase in Rb/Sr, and hence with time in strontium isotope ratios. 

Odum H. T. (1951) Notes on the strontium content of seawater, celestite radiolaria and strontianite snail shells. Science 114, 211-213. 

Yttrium carrier is added to the purified strontium solution and, after a delay of about 14 days for the growth of °Y, the yttrium is separated, mounted and counted. The storage period for the growth of Y can be reduced if sufficient Sr is known to be present, and the appropriate growth factor applied. For samples of very low activity, as well as for measurement of Sr, strontium is precipitated from the solution remaining after the removal of yttrium and mounted for counting. In many cases the determination of the natural inactive strontium content of the material is required so that the strontium chemical yield can be corrected. 

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