The crystal structure of Th<sub>3</sub>N<sub>4</sub>

Bowman, A. L.; Arnold, G.

doi:10.1107/s0567740871001973

Cited by 25 publications

(5 citation statements)

References 4 publications

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“…The values observed here range from 2.51 to 2.64 ]k, compared with 3.655/~ in Li3N (Zintl & Brauer, 1935) and 2.8 A in Th3N4 (Bowman & Arnold, 1971). The only comparable nitrogen-nitrogen separation is one of 2.66/~ in UN2 reported (as a high-pressure phase) by Rundle, Baenziger, Wilson & McDonald (1948).…”

supporting

confidence: 49%

Anion ordering in NaON: a powder neutron-diffraction investigation

Armytage¹,

Fender²

1974

Acta Crystallogr Sect B

103

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The structure of tantalum oxynitride has been determined by the profile analysis of powder neutrondiffraction data collected at 4.2°K. The compound is monoclinic, space group P21/c, with a=4-9581, b=5"0267, c= 5"1752 A., and fl= 99.640 ° (4.2°K). Complete ordering of the anions occurs in alternate layers normal to the [100] direction and this ordering is consistent with calculated site potentials. Short nitrogen-nitrogen distances of 2.51 to 2"64 A~ are observed.

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supporting

confidence: 49%

Anion ordering in NaON: a powder neutron-diffraction investigation

Armytage¹,

Fender²

1974

Acta Crystallogr Sect B

103

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“…Within experimental error, the N-Th bonds are of equal length, 2.36 A. A great many compounds have structures with a nitrogen atom tetrahedrally bonded to four thorium atoms, and averages of the reported values for the N-Th bond lengths in such compounds range from 2.34 to 2.41 A (Benz & Zachariasen, 1966, 1970Bowman & Arnold, 1971).…”

mentioning

confidence: 99%

The crystal and molecular structure of 12-methyl-11,13-dioxo-12-azapentacyclo[4,4,3,01.6,02.10,05.7]trideca-3,8-diene

Hwang¹,

Donohue²,

Tsai³

1972

Acta Crystallogr Sect B

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Crystals of the title compound, CaaHxxO2N, are orthorhombic, space group Fdd2, Z= 8, a=27.289 + 0.004, b = 13.108 + 0.005, c = 9-165 + 0.002/~, Dx = 1.362 g.cm -3. Data for 454 reflections were collected at room temperature on a Picker automated diffractometer. The structure was solved by direct methods, using a computerized multiple-solution procedure, and it was refined by full-matrix least-squares methods to a final R on F of 0"046, with 377 observed reflections. The average e.s.d.'s of the bond lengths and angles not involving hydrogen are about 0.008 A and 0.5 °, respectively. Bond lengths and angles were corrected for thermal motion. Some C-C single bonds are found to be significantly shorter than the normal C-C single bond length of 1.54 A. The shortening of the C-C bonds is explained by the conjugation of the C=O bond and C=C bond with the three-membered ring.

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confidence: 99%