Alkaline earth metals. See

Strontium has a valence of +2 and forms compounds that resemble the compounds of the other alkaline-earth metals (see Barium compounds Calcium compounds). Although many strontium compounds are known, there are only a few that have commercial importance and, of these, strontium carbonate [1633-05-2] SrCO, and strontium nitrate [10042-76-9], Sr(N03)2, are made in the largest quantities. The mineral celestite [7759-02-6], SrSO, is the raw material from which the carbonate or the nitrate is made. 

Reactions of ground-state alkaline earth metals (see Appendix 1) ... 

The carbazole compounds, (77 -Af-carbazolyl)2Ca(pyridine)4, (Tj -N-car-bazolyl)2Sr(NH3)(DME)2, and (i7 -Af-carbazolyl)2Ba(DME)3 (Fig. 9), are colorless or yellow solids that have good solubility in donor solvents such as pyridine. They are monomeric in the solid state with the carbazolyl ligands bonded only through the nitrogen atom (tj ) to the metals. The metal coordination spheres are completed by incorporation of the Lewis bases pyridine, DME, and ammonia. A smooth increase in coordination number with metal size, from 6 (Ca) to 7 (Sr) to 8 (Ba), is observed in these compounds. The reason for the Tj -Af-bondingof the carbazolyl ligand instead of multihapto bonding as occurs in the alkali metal compounds of carbazole and the fluorenyl compounds of the alkaline-earth metals (see Section III,G,2) is presently unclear. ... 

Yellowish-white, slightly lustrous lumps body-centered cubic structure somewhat malleable very easily oxidizable must be kept under petroleum or other oxygen -free liquid to exclude air. d 3.6, mp approx 710 . bp approx 1600. E° (aq) BaJ + /Ba —2.91 V. Description of reactions which are characteristic of alkaline earth metals see Calcium. Solns of sol barium salts give a white ppt with HjS04 or sol sulfates they also color nonluminous flame green. 

Alkaline and alkaline-earth metals see Alkali Metals Inorganic Chemistry and Alkaline Earth Metals Inorganic Chemistij are oxidized directly by alcohol ... 

Alkali metal, see Terminology, Metals, p.242 Alkaline earth metal, see Terminology, Metals, p.242... 

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