Strontium structurally characterized

A long time passed between the first discovery of AE3(BN2)2 phases [17] (AE = Ca, Sr) and their structural characterizations [18, 19]. Two distinct phases are known to exist for both calcium and strontium nitridoborate, denoted as low-temperature y9-AE3(BN2)2 and high-temperature a-AE3(BN2)2 [20]. Their phase transitions have been studied by temperature-dependent XRD, thermo-... 

The chemistry of alkaline-earth chacogenolates have been developed from the nineties with the structural characterization of the first magnesium thiolate in 1990,69 magnesium and calcium tellurolates in 1992,70,71 and the first magnesium and strontium selenolates in 1994.72... 

De Souza RA, Fleig J, Maier J, Kienzle O, Zhang Z, Sigle W, Riihle M (2003) Electrical and structural characterization of a low-angle tilt grain boundary in iron-doped strontium titanate. J Am Ceram Soc 86 922-928... 

A question prior to the one written above is can a species featuring an alkaline earth (AE) metal-carbon formal double bond be synthesized In fact, this is no trivial matter and AE=CH2 species are likely polymeric. The first synthesis of such a molecular complex was only realized in 2006. Therefore, examples of structurally characterized alkaline earth metal complexes featuring a hypervalent phosphorus-stabilized geminal dianion as a ligand are scarce enough to be thoroughly reviewed here. Wlule a few examples are found for magnesium [24, 37, 38], calcium [39-41], and even barium [30], there is to date no example of such complexes with strontium or beryllium. The full set of complexes is represented in Chart 3. 

Prior to the previous edition of this book, no examples of substituted strontium amides had been well characterized. Even now, only a few strontium amide crystal structures are known and have been briefly reviewed in the context of more general aspects of the chemistry of group 2 metal compounds. ... 

Strontium metaborate SrO B203 4H2O has been well characterized, the crystal structures of both monoclinic (228) and triclinic (321) forms indicating the formula Sr[B(OH) J2. It is readily formed by reacting soluble strontium salts with sodium metaborate solutions at a pH in excess of 11. 

Recrystallization may influence the crystal structural, elemental and isotopic compositions of the carbonate in question (Gregg eta/., 1992 Chafetz Rush, 1994 Malone et al., 1994 Kupecz Land, 1994). Carbonate cements formed by recrystallization are characterized by lower 8 values than the microcrystalline precursor cements. This suggests the involvement of meteoric waters or increased burial temperatures. Therefore recrystallization must be considered when 6 0 is used for studies on palaeoclimate, the timing of cementation and palaeo-water composition. Unlike 6 0, the carbon and strontium isotopic compositions of carbonates may be preserved during recrystallization, particularly in low permeability rocks (Dutton Land, 1985 Siegel et al., 1987 Cerling, 1991 Driese Mora, 1993 Kupecz Land, 1994). 

Sm2Coi7 magnet swarf, 164f Smectic phases characterization, 10 smectic A phase (SmA), 10 11 smectic B phase (SmC), 11 smectic C phase (SmC), 10 11 Space filling mesophase, 7-9 Strontium(II) distribution ratio, 229f Structural properties of cerium... 

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