Strontium Thiocyanate
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Strontium thiocyanate refers to the salt . It is a colorless solid. According to
X-ray crystallography X-ray crystallography is the experimental science of determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to Diffraction, diffract in specific directions. By measuring th ...
, it is a
coordination polymer Coordination may refer to: * Coordination (linguistics), a compound grammatical construction * Coordination complex, consisting of a central atom or ion and a surrounding array of bound molecules or ions ** A chemical reaction to form a coordinat ...
. The Sr2+ ions are each coordinated to eight
thiocyanate Thiocyanates are salts containing the thiocyanate anion (also known as rhodanide or rhodanate). is the conjugate base of thiocyanic acid. Common salts include the colourless salts potassium thiocyanate and sodium thiocyanate. Mercury(II) t ...
anions in a distorted
square antiprismatic molecular geometry In chemistry, the square antiprismatic molecular geometry describes the shape of compounds where eight atoms, groups of atoms, or ligands are arranged around a central atom, defining the vertices of a square antiprism. This shape has D4d symmetry ...
where each square face contains two adjacent S atoms and two adjacent N atoms. The motif is reminiscent of the
fluorite structure The fluorite structure refers to a common motif for compounds with the formula MX2. The X ions occupy the eight tetrahedral interstitial sites whereas M ions occupy the regular sites of a face-centered cubic In crystallography, the cubic (or is ...
. The same structure is observed for Ca(SCN)2, Ba(SCN)2, and Pb(SCN)2.


References

Thiocyanates Strontium compounds {{inorganic-compound-stub