Bariumazid und die Bariumazidhydrate

Torkar, K.; Krischner, H.; Radl, H.

doi:10.1007/bf00919166

Cited by 16 publications

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“…No intensity changes were observed due to the neutron irradiation. The unit-cell parameters given by Torkar et al (1965) were used for this study, assuming the standard deviations as 0.005 A for the cell lengths and 0.05 o for the fl angle.…”

Section: Introductionmentioning

confidence: 99%

Neutron diffraction study of Ba(N₃)₂

Choi¹

1969

Acta Crystallogr Sect B

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The crystal structure of anhydrous barium azide, Ba(Na)2, has been determined bysingle-crystal neutron diffraction methods. The unit cell is monoclinic, a= 9.59, b = 4"39, c= 5.42 A,/~= 99-75 o; space group P2a/m, with two molecules per cell. All atoms were shown by a Patterson map to lie on mirror planes.The trial structure was refined by the method of full-matrix least-squares to a final R index of 0.041. There are two non-equivalent azide groups, a four coordinated apparently symmetric azide and a five coordinated azide with a slight probable asymmetry. Barium atoms are surrounded by nine azides, in the form of a right triangular prism with three azides near the centers of each of the three vertical faces. The structure consists of infinite BaN bond chain layers, packed laterally with long BaN bonds. An inspection of the thermal ellipsoids suggests that the thermal vibrations of the nitrogen atoms can be described largely in terms of rigid-bar angular oscillations of the azide axis with the larger amplitude in the direction of lesser constraint.

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Section: Introductionmentioning

confidence: 99%

Neutron diffraction study of Ba(N₃)₂

Choi¹

1969

Acta Crystallogr Sect B

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“…W ährend von komplexen Aziden einige wasserhaltige V erbindun gen gut bekannt sind [1][2][3], wurden auch bei einfa chen Aziden, die neben Azidgruppen nur eine Art von Metallatomen enthalten, verschiedene Azidhy drate nachgewiesen [4][5][6][7][8][9][10][11], Lediglich von drei dieser Azidhydrate wurden bisher die K ristallstrukturen bestimmt. Da Wasser in jeder dieser drei V erbindun gen auf verschiedene Weise eingebaut wird, sollen diese Strukturen im folgenden kurz beschrieben werden.…”

Section: Introductionunclassified

Die Kristallstruktur von [Mg(H₂O)₆](N₃)₂ / The Crystal Structure of [Mg(H₂O)₆](N₃)₂

Mautner

Krischner

Kratky

1986

Zeitschrift Für Naturforschung B

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Abstract The crystal structure of [Mg(H2O)6](N3)2 was determined by single crystal X-ray diffraction (421 independent observed MoKα-counter reflections. R = 0.037). The crystals are orthorhombic, space group Fmmm, Z = 4, a = 644.3(1), b = 1134.4(1), c = 1333.5(3) pm. The magnesium atoms are octahedrally coordinated to six oxygen atom s of water molecules, the azide groups are not coordinated to metal atoms, N -N = 117.0(2) pm.

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“…gungen wurden von TORKAR, KRISCHNER und RADL (1965) angegeben, die Zellabmessungen von WALITZI und KRISCHNER (1970 a) bestimmt. In diesen Arbeiten wurde auch auf die zeitweilige Verwechslung von kristallwasserfreiem Bariumazid mit dem Monohydrat in der älteren Literatur hingewiesen.…”

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Die Kristallstruktur von Bariumazidmonohydrat Ba(N₃)₂ · H₂O

Walitzi¹,

Krischner²

1973

Zeitschrift Für Kristallographie - Crystalline Materials

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The crystal structure of barium azide monohydrate Ba(N3)2 · H2O has been determined from three-dimensional photographic x-ray data and was refined by the method of least-squares to a final Β = 10.3°/o. The unit cell is monoclinic, a = 7.29 Á, b -10.84 Â, c -6.96 Â, β -104°42', space group Cc-C, 4 with four molecules per cell. Each barium atom is surrounded by seven end nitrogen atoms and two H2O, in the form of a distorted triangular prism with three more atoms above the centers of each of the three faces of the prism. The azide groups are linear and symmetric with an average Ν-Ν distance of 1.173 Á. AuszugDie Kristallstruktur von Bariumazidmonohydrat Ba(N3)2 · H2O wurde aus dreidimensionalen photographischen Röntgendaten bestimmt und nach der Methode der kleinsten Fehlerquadrate bis zu einem iî = 10,3°/o verfeinert. Die Abmessungen der monoklinen Elementarzelle betragen o = 7,29 Ä,ö = 10,84 Â, e = 6,96 Â, β = 104° 42' mit vier Formeleinheiten ; die Raumgruppe ist Ce-C« 4 . Jedes Bariumatom ist von sieben End-Stickstoffatomen und zwei H2O in Form eines verzerrten dreiseitigen Prismas umgeben, bei dem drei weitere Atome über den Prismenflächen angeordnet sind. Die Azidgruppen sind linear und symmetrisch, der mittlere N-N-Abstand beträgt 1,173 Â.

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Bariumazid und die Bariumazidhydrate

Cited by 16 publications

References 0 publications

Neutron diffraction study of Ba(N₃)₂

Neutron diffraction study of Ba(N₃)₂

Die Kristallstruktur von [Mg(H₂O)₆](N₃)₂ / The Crystal Structure of [Mg(H₂O)₆](N₃)₂

Die Kristallstruktur von Bariumazidmonohydrat Ba(N₃)₂ · H₂O

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Bariumazid und die Bariumazidhydrate

Cited by 16 publications

References 0 publications

Neutron diffraction study of Ba(N3)2

Neutron diffraction study of Ba(N3)2

Die Kristallstruktur von [Mg(H2O)6](N3)2 / The Crystal Structure of [Mg(H2O)6](N3)2

Die Kristallstruktur von Bariumazidmonohydrat Ba(N3)2 · H2O

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Neutron diffraction study of Ba(N₃)₂

Neutron diffraction study of Ba(N₃)₂

Die Kristallstruktur von [Mg(H₂O)₆](N₃)₂ / The Crystal Structure of [Mg(H₂O)₆](N₃)₂

Die Kristallstruktur von Bariumazidmonohydrat Ba(N₃)₂ · H₂O