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Crystal structure of the inter-metallic compound SrCdPt.

Gulo F, Köhler J - Acta Crystallogr Sect E Struct Rep Online (2014)

Bottom Line: The Pt atoms form cadmium-centred tetra-hedra that are condensed into a three-dimensional network with channels parallel to the b-axis direction in which the Sr atoms are located.The latter are bonded to each other in the form of six-membered rings with chair conformations.All atoms in the SrCdPt structure are situated on a mirror plane.

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Affiliation: Department of Chemical Education, Sriwijaya University, Inderalaya, Ogan Ilir 30662, South Sumatra, Indonesia.

ABSTRACT
The crystal structure of the title compound, strontium cadmium platinum, adopts the TiNiSi structure type with the Sr atoms on the Ti, the Cd atoms on the Ni and the Pt atoms on the Si positions, respectively. The Pt atoms form cadmium-centred tetra-hedra that are condensed into a three-dimensional network with channels parallel to the b-axis direction in which the Sr atoms are located. The latter are bonded to each other in the form of six-membered rings with chair conformations. All atoms in the SrCdPt structure are situated on a mirror plane.

No MeSH data available.


Coordination polyhedra of Sr, Cd, and Pt atoms in the structure of SrCdPt.
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fig3: Coordination polyhedra of Sr, Cd, and Pt atoms in the structure of SrCdPt.

Mentions: Strontium has an overall coordination number of 15 and is surrounded by four other strontium, six cadmium, and five platinum atoms. The Sr—Cd distances range from 3.3932 (13) to 3.6124 (17) Å, whereas the Sr—Pt distances vary only slightly, from 3.1943 (11) to 3.2238 (10) Å. Cadmium is located at a site that is surrounded by six strontium and four platinum atoms, whilst platinum has a coordination number of 9 defined by five strontium and four cadmium atoms. The environment of each atom in this structure is represented in Fig. 3 ▶. The inter­atomic distances (Sr—Cd, Sr—Pt, and Cd—Pt) are in good agreement with those found in the structures of some other ternary compounds in the alkaline earth–Cd–Pt system (Samal & Corbett, 2012 ▶; Samal et al., 2013 ▶; Gulo et al., 2013 ▶; Kersting et al., 2013 ▶). In SrCdPt, the shortest Cd—Cd distance of 3.3197 (15) Å is too long to be considered as a bond. It is significantly longer than the sum of the covalent radii of 2.90 Å (Emsley, 1999 ▶). In contrast, cadmium atoms are bonded together, forming Cd4 tetra­hedra in SrCd4Pt2, Cd8 tetra­hedral stars in Ca6Cd16Pt8, and Cd7 penta­gonal bipyramids in Ca6Cd11Pt.


Crystal structure of the inter-metallic compound SrCdPt.

Gulo F, Köhler J - Acta Crystallogr Sect E Struct Rep Online (2014)

Coordination polyhedra of Sr, Cd, and Pt atoms in the structure of SrCdPt.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4257373&req=5

fig3: Coordination polyhedra of Sr, Cd, and Pt atoms in the structure of SrCdPt.
Mentions: Strontium has an overall coordination number of 15 and is surrounded by four other strontium, six cadmium, and five platinum atoms. The Sr—Cd distances range from 3.3932 (13) to 3.6124 (17) Å, whereas the Sr—Pt distances vary only slightly, from 3.1943 (11) to 3.2238 (10) Å. Cadmium is located at a site that is surrounded by six strontium and four platinum atoms, whilst platinum has a coordination number of 9 defined by five strontium and four cadmium atoms. The environment of each atom in this structure is represented in Fig. 3 ▶. The inter­atomic distances (Sr—Cd, Sr—Pt, and Cd—Pt) are in good agreement with those found in the structures of some other ternary compounds in the alkaline earth–Cd–Pt system (Samal & Corbett, 2012 ▶; Samal et al., 2013 ▶; Gulo et al., 2013 ▶; Kersting et al., 2013 ▶). In SrCdPt, the shortest Cd—Cd distance of 3.3197 (15) Å is too long to be considered as a bond. It is significantly longer than the sum of the covalent radii of 2.90 Å (Emsley, 1999 ▶). In contrast, cadmium atoms are bonded together, forming Cd4 tetra­hedra in SrCd4Pt2, Cd8 tetra­hedral stars in Ca6Cd16Pt8, and Cd7 penta­gonal bipyramids in Ca6Cd11Pt.

Bottom Line: The Pt atoms form cadmium-centred tetra-hedra that are condensed into a three-dimensional network with channels parallel to the b-axis direction in which the Sr atoms are located.The latter are bonded to each other in the form of six-membered rings with chair conformations.All atoms in the SrCdPt structure are situated on a mirror plane.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Chemical Education, Sriwijaya University, Inderalaya, Ogan Ilir 30662, South Sumatra, Indonesia.

ABSTRACT
The crystal structure of the title compound, strontium cadmium platinum, adopts the TiNiSi structure type with the Sr atoms on the Ti, the Cd atoms on the Ni and the Pt atoms on the Si positions, respectively. The Pt atoms form cadmium-centred tetra-hedra that are condensed into a three-dimensional network with channels parallel to the b-axis direction in which the Sr atoms are located. The latter are bonded to each other in the form of six-membered rings with chair conformations. All atoms in the SrCdPt structure are situated on a mirror plane.

No MeSH data available.