The solubility of chromium in β-rhombohedral boron as determined in CrB∼41 by single-crystal diffractometry

Andersson, Sven; Lundström, Torsten

doi:10.1016/0022-4596(70)90057-5

Cited by 66 publications

(29 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Possible metal atom positions were given as A1, A2, A3, D, E, F1, F2, and G by Anderson and Lundstrom. [213] It has also been reported that the A1 and E positions cannot be occupied at the same time. In most cases, these phases-in as far as they have been discovered and described to dateare transition-metal borides (Cr, Cu, Fe, Mn, Ni, Sc, V, Zn).…”

Section: General Observationsmentioning

confidence: 97%

Boron: Elementary Challenge for Experimenters and Theoreticians

Albert¹,

Hillebrecht²

2009

Angew Chem Int Ed

567

436

View full text Add to dashboard Cite

Many of the fundamental questions regarding the solid-state chemistry of boron are still unsolved, more than 200 years after its discovery. Recently, theoretical work on the existence and stability of known and new modifications of the element combined with high-pressure and high-temperature experiments have revealed new aspects. A lot has also happened over the last few years in the field of reactions between boron and main group elements. Binary compounds such as B(6)O, MgB(2), LiB(1-x), Na(3)B(20), and CaB(6) have caused much excitement, but the electron-precise, colorless boride carbides Li(2)B(12)C(2), LiB(13)C(2), and MgB(12)C(2) as well as the graphite analogue BeB(2)C(2) also deserve special attention. Physical properties such as hardness, superconductivity, neutron scattering length, and thermoelectricity have also made boron-rich compounds attractive to materials research and for applications. The greatest challenges to boron chemistry, however, are still the synthesis of monophasic products in macroscopic quantities and in the form of single crystals, the unequivocal identification and determination of crystal structures, and a thorough understanding of their electronic situation. Linked polyhedra are the dominating structural elements of the boron-rich compounds of the main group elements. In many cases, their structures can be derived from those that have been assigned to modifications of the element. Again, even these require a critical revision and discussion.

show abstract

Section: General Observationsmentioning

confidence: 97%

Boron: Elementary Challenge for Experimenters and Theoreticians

Albert¹,

Hillebrecht²

2009

Angew Chem Int Ed

567

436

View full text Add to dashboard Cite

show abstract

“…Dopants ordinarily either occupy only the D-site (like in CrB $ 41 [20], FeB $ 49 [28], and VB $ 65 [29]), or are displaced from it at $ 0.4Å that results in splitting the position of the dopant atom (like in NiB 48.5 [30]). A situation when both the D-site and its disordered positions are present simultaneously has been reported for the structure of CuB $ 23 [31].…”

Section: Resultsmentioning

confidence: 98%

“…1e). Possible atomic interstitial positions were first described by Andersson et al [20] and, designated as A1, A2, A3, D, E, F1, F2 and G,. Later, Slack et al [19] refined these positions and introduced additional ones designated as J1 through J7.…”

Section: Introductionmentioning

confidence: 99%

The crystal structure of aluminum doped β-rhombohedral boron

Bykova

Parakhonskiy

Chernyshov³

et al. 2012

Journal of Solid State Chemistry

View full text Add to dashboard Cite

“…boron of the composition CrB_ 41 (Andersson and Lundström, 1970). boron forms a very rigid structure containing interstices or holes, which can accommodate transition metal atoms or ρ element atoms.…”

Section: Description and Discussionmentioning

confidence: 99%

“…A systematic study of interstices, which are sufficiently large to accommodate atoms, was presented in connection with a single-crystal investigation of a solid solution of chromium in ß-rh. (2) The interstices most commonly occupied by transition metals and ρ elements are Al and D (for notation see Andersson and Lundström, 1970). In recent years single-crystal investigations of metal and ρ element distribution in the ß-rh.…”

Section: Description and Discussionmentioning

confidence: 99%

Molecular and crystal structure of C.I. Pigment Yellow 1. 11680, N-PhenyI-2-(4-methyl-2-nitro-phenylhydrazono)- 3-oxo-butyramide (Hansagelb G)

Paulus¹

1984

Zeitschrift Für Kristallographie - Crystalline Materials

View full text Add to dashboard Cite

Hansagelb G has the structure formula N-Phenyl-2-(4-methyl-2nitro-phenylhydrazono)-3-oxo-butyramide. Like other "azo"-pigments the molecule prefers -at least in solid state -the hydrazono -to the azotautomeric form. It crystallizes in the monoclinic space group P2Jn with 4 molecules in the unit cell. It could be shown that the cell constants given in the literature are wrong. The molecules are crystallizing in layers built by endless tapes joined together like staircases. Brought to you by | New York University Bobst Library Technical Service Authenticated Download Date | 7/23/15 7:38 PM 66 Ε. F. Paulus: Hansagelb G Experimental To get fairly good crystals we used ethylene glycolmonomethylether suggested as solvent in the literature (Mez, 1968). We also got very bad faulty crystals. The crystals from chlorbenzene, however, proved to be excellent. One of them (0.4 χ 0.26 χ 0.13 mm 3 ) was sealed in a Mark tube and fixed to a goniometer head. The cell determination and the intensity measurements were done on a four circle single crystal Nicolet diffractometer with MoKa-radiation, 23/3scan, scan speed of 2 to 20°/min depending on the strength of the special reflexion and a 3 max of 28°. An absorption correction was not necessary (μ = 0.97 cm -1 ). The extinction correction consisted of leaving 7 larger reflexions. Of the 3878 unique reflexions to be measured 3043 had intensities larger than their standard deviation according to the counting statistics and only these were used in the structure determination. These counting statistics Ε. F. Paulus: Hansagelb G 67 were also the basis for the weighting scheme in the least-squares refinement of the structure parameters [φ = l/a 2 (F)]. The following cell parameters were found: a = 7.598(1), 0 = 20.375(2), c = 10.440(1)A; 0 = 98.18(1)°; V= 1599.8 Ä; Ζ = 4; Q X = 1.413gem" 3 ; ρ"ρ (in aqueous K2HgJ4-sol.) = 1.41 gem" 3 ; P2Jn. Formula: C17H16N404; M.W.: 340.34. The given standard deviations resulted from 12 independent measurements.

show abstract

The solubility of chromium in β-rhombohedral boron as determined in CrB∼41 by single-crystal diffractometry

Cited by 66 publications

References 7 publications

Boron: Elementary Challenge for Experimenters and Theoreticians

Boron: Elementary Challenge for Experimenters and Theoreticians

The crystal structure of aluminum doped β-rhombohedral boron

Molecular and crystal structure of C.I. Pigment Yellow 1. 11680, N-PhenyI-2-(4-methyl-2-nitro-phenylhydrazono)- 3-oxo-butyramide (Hansagelb G)

Contact Info

Product

Resources

About