Mg5Pd10Si16 und Mg5Pt10Si16, Magnesium-Platinmetall-Silicide mit Tetraedern und gekappten Tetraedern aus Silicium-Atomen / Mg5Pd10Si16 and Mg5Pt10Si16, Magnesium Platinum Metal Silicides with Si4 Tetrahedra and Si12 Truncated Tetrahedra
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Peter Lorenz
The ternary silicides Mg5Pd10Si16 and Mg5Pt10Si16 have been prepared by reaction of magnesium with the binary platinum-metal silicides in sealed tantalum containers (Pt-compound: 1200°C, 3 d, up 20 °/h, down 5 °/h; Pd-compound: 1000°C, 2 d, up and down 50 °/h). In the case of the Pd-compound contact with the tantalum had to be avoided by using a boron nitride crucible. The isotypic compounds crystallize in the cubic space group F4̄3m with 4 formula units per unit cell. The crystal structures were determined from single crystal data, lattice constants from Guinier patterns. The following data were obtained: a = 1258.81(8) pm for Mg5Pd10Si16 and a = 1256.94(9) pm for Mg5Pt10Si16. Short distances in the three-dimensional platinum-metal silicon network indicate strong, covalent Pd(Pt)-Si-bonding (d(Pd-Si) = 240.2 to 256.1 pm; d(Pt-Si) = 237.1 to 258.5 pm). In addition, homonuclear bonding seems to be important, resulting in the formation of Si4-tetrahedra (d(Si-Si) = 250.4 pm (Mg5Pd10Si16) and 255 pm (Mg5Pt10Si16)), empty Si12-polyhedra with the shape of truncated tetrahedra (d(Si- Si): 234.5 and 248.2 pm (Mg5Pd10Si16); 236 and 248.2 pm (Mg5Pt10Si16)), and Mg-centered Pd(Pt)10-clusters with the shape of adamantane (d(Pd-Pd) = 282.3 pm; d(Pt-Pt) = 284.5 pm). Furthermore, Mg4-tetrahedra with Mg-Mg-distances of 360 pm are formed. The structure may be described by an expanded cubic “close” packing of MgPd(Pt)10-units in which the Si4-tetrahedra occupy the octahedral holes while the Si12-polyhedra and the Mg4-tetrahedra reside in one half of the tetrahedral holes each.
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Articles in the same Issue
- Zur Kenntnis von Calciumtetrahydrogen-hexaoxo-diperiodattetrahydrat CaH4I2O10 · 4 H2O: Kristallstruktur, Schwingungsspektren und thermische Analyse / On Calciumtetrahydrogen-hexaoxo-diperiodatetetrahydrate CaH4I2O10 · 4 H2O: Crystal Structure, Vibrational Spectroscopy and Thermal Analysis
- Mg5Pd10Si16 und Mg5Pt10Si16, Magnesium-Platinmetall-Silicide mit Tetraedern und gekappten Tetraedern aus Silicium-Atomen / Mg5Pd10Si16 and Mg5Pt10Si16, Magnesium Platinum Metal Silicides with Si4 Tetrahedra and Si12 Truncated Tetrahedra
- Synthesis and Crystal Structure of Zr5Rh2In4 and Hf5Rh2In4 – New Ternary Indides with Lu5Ni2In4 Type Structure
- Crystal Structure of the Ternary Arsenide CeNi1.91As1.94
- Kristallstrukturen und elektronische Eigenschaften von Ge1/3NbS2 und Ge1/4NbS2 / Crystal Structures and Electronic Properties of Ge1/3NbS2 and Ge1/4NbS2
- Ni(C2(COO)2)(H2O)4 · 2 H2O und Ni(C2(COO)2)(H2O)2: zwei Koordinationspolymere mit dem Acetylendicarboxylat-Dianion / Ni(C2(COO)2)(H2O)4 · 2 H2O and Ni(C2 (COO)2)(H2O)2: Two Co-ordination Polymers of the Acetylenedicarboxylate Dianion
- Reactions in Molten Alkalimetal Polychalcogenides: What Happens in the Melt? A Study of the Reactions in the System K-Nb-S Using Differential Scanning Calorimetry, Infrared Spectroscopy, and X-Ray Powder Diffraction
- Synthesis and X-Ray Crystal Structure Determination of Thiotrithiazyl Iododichloride, S4N3ICl2
- Synthesis, Structural and Spectroscopic Characterization of the α,ω-Diammonioalkane Hexabromorhodates( III) [H3N(CH2)xNH3]2[H5O2][RhBr6]Br2 (x = 3, 4) – IR Spectra of [H5O2]+ Ions with Weak Solid State Interactions
- ortho-Lithiation of Benzene-1,2-dithiol: A Methodology for ortho-Functionalization of Benzene-1,2-dithiol
- New Ternary Phosphide La7Pd17P12: Preparation and Crystal Structure
- NdClSeO3 and ErClSeO3: First Chloride-Selenites of the Rare Earth Elements
- Ca(SCN)2 and Ca(SCN)2 · 2 H2O: Crystal Structure, Thermal Behavior and Vibrational Spectroscopy
- Sulfidisch derivatisierte Oxodisilicate der schweren Lanthanide vom Formeltyp M4S3[Si2O7] (M = Gd - Tm) / Sulfide Derivatized Oxodisilicates of the Heavy Lanthanides with the Formula M4S3[Si2O7] (M = Gd - Tm)
- Novel Thioborates of Cesium: Cs3BS3 and Li2CsBS3
- Untersuchungen im System ScCl3 / K2CO3 / H2O: Synthese und Kristallstrukturen von K5[Sc(CO3)4] · 5 H2O und K7[Sc(CO3)4]CO3 · 9 H2O / Investigations on the System ScCl3 / K2CO3 / H2O: Synthesis and Crystal Structures of K5[Sc(CO3)4] · 5 H2O and K7[Sc(CO3)4] CO3 · 9 H2O
- Polyol-Metall-Komplexe, 43 [1]. Galactarato-Komplexe mit Aluminium und Kupfer(II) / Polyol Metal Complexes, 43 [1]. Galactarato Complexes with Aluminium and Copper(II)
- A New Copper (II) Complex with the N,N'-Bis(antipyryl-4-methyl)-piperazine (BAMP) Ligand: [Cu(BAMP)](ClO4)2
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Articles in the same Issue
- Zur Kenntnis von Calciumtetrahydrogen-hexaoxo-diperiodattetrahydrat CaH4I2O10 · 4 H2O: Kristallstruktur, Schwingungsspektren und thermische Analyse / On Calciumtetrahydrogen-hexaoxo-diperiodatetetrahydrate CaH4I2O10 · 4 H2O: Crystal Structure, Vibrational Spectroscopy and Thermal Analysis
- Mg5Pd10Si16 und Mg5Pt10Si16, Magnesium-Platinmetall-Silicide mit Tetraedern und gekappten Tetraedern aus Silicium-Atomen / Mg5Pd10Si16 and Mg5Pt10Si16, Magnesium Platinum Metal Silicides with Si4 Tetrahedra and Si12 Truncated Tetrahedra
- Synthesis and Crystal Structure of Zr5Rh2In4 and Hf5Rh2In4 – New Ternary Indides with Lu5Ni2In4 Type Structure
- Crystal Structure of the Ternary Arsenide CeNi1.91As1.94
- Kristallstrukturen und elektronische Eigenschaften von Ge1/3NbS2 und Ge1/4NbS2 / Crystal Structures and Electronic Properties of Ge1/3NbS2 and Ge1/4NbS2
- Ni(C2(COO)2)(H2O)4 · 2 H2O und Ni(C2(COO)2)(H2O)2: zwei Koordinationspolymere mit dem Acetylendicarboxylat-Dianion / Ni(C2(COO)2)(H2O)4 · 2 H2O and Ni(C2 (COO)2)(H2O)2: Two Co-ordination Polymers of the Acetylenedicarboxylate Dianion
- Reactions in Molten Alkalimetal Polychalcogenides: What Happens in the Melt? A Study of the Reactions in the System K-Nb-S Using Differential Scanning Calorimetry, Infrared Spectroscopy, and X-Ray Powder Diffraction
- Synthesis and X-Ray Crystal Structure Determination of Thiotrithiazyl Iododichloride, S4N3ICl2
- Synthesis, Structural and Spectroscopic Characterization of the α,ω-Diammonioalkane Hexabromorhodates( III) [H3N(CH2)xNH3]2[H5O2][RhBr6]Br2 (x = 3, 4) – IR Spectra of [H5O2]+ Ions with Weak Solid State Interactions
- ortho-Lithiation of Benzene-1,2-dithiol: A Methodology for ortho-Functionalization of Benzene-1,2-dithiol
- New Ternary Phosphide La7Pd17P12: Preparation and Crystal Structure
- NdClSeO3 and ErClSeO3: First Chloride-Selenites of the Rare Earth Elements
- Ca(SCN)2 and Ca(SCN)2 · 2 H2O: Crystal Structure, Thermal Behavior and Vibrational Spectroscopy
- Sulfidisch derivatisierte Oxodisilicate der schweren Lanthanide vom Formeltyp M4S3[Si2O7] (M = Gd - Tm) / Sulfide Derivatized Oxodisilicates of the Heavy Lanthanides with the Formula M4S3[Si2O7] (M = Gd - Tm)
- Novel Thioborates of Cesium: Cs3BS3 and Li2CsBS3
- Untersuchungen im System ScCl3 / K2CO3 / H2O: Synthese und Kristallstrukturen von K5[Sc(CO3)4] · 5 H2O und K7[Sc(CO3)4]CO3 · 9 H2O / Investigations on the System ScCl3 / K2CO3 / H2O: Synthesis and Crystal Structures of K5[Sc(CO3)4] · 5 H2O and K7[Sc(CO3)4] CO3 · 9 H2O
- Polyol-Metall-Komplexe, 43 [1]. Galactarato-Komplexe mit Aluminium und Kupfer(II) / Polyol Metal Complexes, 43 [1]. Galactarato Complexes with Aluminium and Copper(II)
- A New Copper (II) Complex with the N,N'-Bis(antipyryl-4-methyl)-piperazine (BAMP) Ligand: [Cu(BAMP)](ClO4)2
- Synthesis and Characterisation of Na5[CoO2]CO3
