Alkaline earth silicides, germanides and stannides with CrB structure type

Rieger, W.; Parthé, E.

doi:10.1107/s0365110x67001793

Cited by 107 publications

(48 citation statements)

References 4 publications

(5 reference statements)

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“…[15] Experimental Section Synthesis: Sample preparation was performed in an argon atmosphere. The precursor phase BaGe [25] was prepared by melting an equimolar mixture of Ba (ChemPur, 99.9 %) and Ge (ChemPur, 99.9999+ %) in an open glassy carbon crucible (Sigradur G, HTW) by using a highfrequency furnace. For the synthesis of Ba 3 Ge 16 Ir 4 , BaGe and elemental Ge were finely ground, and mixed with elemental Ir (Chempur, 99.9 %, powder) in the stoichiometric ratio.…”

Section: Introductionmentioning

confidence: 99%

Preparation, Crystal Structure and Physical Properties of the Superconducting Cage Compound Ba₃Ge₁₆Ir₄

Nguyen

Prots

Schnelle

et al. 2014

Zeitschrift anorg allge chemie

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Abstract. The cage compound Ba 3 Ge 16 Ir 4 crystallizes with the Ba 3 Ge 16 Rh 4 type of crystal structure, which represents a hierarchical derivative of the BaAl 4 type. The crystal structure [Pearson symbol tI46, space group I4/mmm; a = 6.5312(2) Å, c = 22.2845(6) Å] was refined from single-crystal X-ray diffraction data. The phase was obtained after 10 d at 910°C with small impurities of clathrate-I,

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Section: Introductionmentioning

confidence: 99%

Preparation, Crystal Structure and Physical Properties of the Superconducting Cage Compound Ba₃Ge₁₆Ir₄

Nguyen

Prots

Schnelle

et al. 2014

Zeitschrift anorg allge chemie

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“…This produces structural units like the chains found in Group VI elements. These can be infinite spirals, as in compounds of LiAs (91-93) or NaP (94, 95) structures; or planar zigzag rows, as in compounds of CaSb2 (96, 97) ( Figure 10) or CaSi structures (equivalent to CrB-type) (31,(84)(85)(86)(87)(88)(89)(90). A triple-charged element IV atom or a double-charged element V atom has seven valence electrons and needs just one covalent bond to complete its octet.…”

Section: Zintl Phases With Oligomeric and Polymeric Isoanionsmentioning

confidence: 99%

On the Problem of Polar Intermetallic Compounds: The Stimulation of E. Zintl's Work for the Modern Chemistry of Intermetallics

Schäfer¹

1985

Annu. Rev. Mater. Sci.

256

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Annu. Rev. Mater. Sci. 1985.15:1-42 About three quarters of all elements are metals or semimetals, which means more than half of all binary mixtures exist in the metallic state. As the binary and ternary systems of metals usually do not contain fewer compounds than those of nonmetals, one would guess that the chemistry of inter metallics would have at least the same significance in research and chemistry textbooks as that of compounds containing nonmetals. However, intermetallic chemistry remained beyond the scope of most chemists, even when intermetallic compounds had gained tremendous technical and economic importance. Their characterization was mainly performed by physicists and metallurgists, who concentrated their efforts on describing those properties essential to the technological use of these materials. The chemical characterization of these compounds is still incomplete. Our knowledge of the number of compounds possible in the systems, their chemical properties, and most important, the bonding mechanism in these phases is far less developed than in other chemical fields. This huge part of chemistry is-with few exceptions (2}-mostly summarized in a very general way, based on the classical concept of the metallic bond (1, 1a). There is no differentiation in classes of compounds, as has long been accepted in other fields of chemistry. This situation is 1 0084--6600/85/0801-0001$02.00 Annu. Rev. Mater. Sci. 1985.15:1-42 2 SCHAFER demonstrated best by the fact that, according to several authors, the word "compound" should not be used for intermetallic phases (3). These scientists feel that stoichiometric sharp compounds do not exist in these systems at all, and that some range of composition is always absolutely necessary to define a metallic phase. Chemically based valence rules, used in other classes of chemical compounds, were thought to be impossible (3). In contrast with this view, which mainly originated among the physical and metallurgical scientists, and which is surely valid for some families of i ntermeta lH cs, t h e ChemI st Ed uard Z intl set f orth a model based on chemical valences for at least some classes of intermetallics. Ionic and covalent bonds in intermetallic phases were a matter of course for Zintl, who believed in the cognition, especially valid for chemistry, that natura non facit saltus.Eduard Zintl was born" on January 21, 1898, in Weiden-in-der-Oberpfalz, Bavaria. He took his PhD at the University of Munich in 1923, as a co worker of Professor O. Honigschmid, who is famous for the accurate determination of the atomic weights of several elements. Two years later Zintl received the venia legendi for chemistry, as assistant of the chemical laboratories of the Bavarian Academy of Science. At that time he published the determination of several atomic weights, and analytical developments concerning potentiometric titrations. He left Munich in 1928 and, as a professor in Freiburg, began his work on intermetallic compounds. He was very successful in this field. With many publications to ...

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“…Na 0.14Sr0.86Ge crystallizes with the a-TlI structure type (also known as CrB type) similar to other MGe (M = Ca, Sr, Ba ) compounds [1][2][3]. The Zintl anion is a one-dimensional planar chain in all-trans conformation (d(Ge-Ge) = 2.602(3) Å; ÐGe-Ge-Ge = 104.8(1)°).…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of sodium strontium monogermanide, NaxSr1–xGe (x = 0.14)

Xie

Nesper

2003

Zeitschrift Für Kristallographie - New Crystal Structures

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Alkaline earth silicides, germanides and stannides with CrB structure type

Cited by 107 publications

References 4 publications

Preparation, Crystal Structure and Physical Properties of the Superconducting Cage Compound Ba₃Ge₁₆Ir₄

Preparation, Crystal Structure and Physical Properties of the Superconducting Cage Compound Ba₃Ge₁₆Ir₄

On the Problem of Polar Intermetallic Compounds: The Stimulation of E. Zintl's Work for the Modern Chemistry of Intermetallics

Crystal structure of sodium strontium monogermanide, NaxSr1–xGe (x = 0.14)

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Alkaline earth silicides, germanides and stannides with CrB structure type

Cited by 107 publications

References 4 publications

Preparation, Crystal Structure and Physical Properties of the Superconducting Cage Compound Ba3Ge16Ir4

Preparation, Crystal Structure and Physical Properties of the Superconducting Cage Compound Ba3Ge16Ir4

On the Problem of Polar Intermetallic Compounds: The Stimulation of E. Zintl's Work for the Modern Chemistry of Intermetallics

Crystal structure of sodium strontium monogermanide, NaxSr1–xGe (x = 0.14)

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Preparation, Crystal Structure and Physical Properties of the Superconducting Cage Compound Ba₃Ge₁₆Ir₄

Preparation, Crystal Structure and Physical Properties of the Superconducting Cage Compound Ba₃Ge₁₆Ir₄