The crystal structure of the low-temperature phase of NH<sub>4</sub>NO<sub>3</sub>(V) at−150°C*

Amorós, Jaume; Arrese, F .; Canut, M. L.

doi:10.1524/zkri.1962.117.2-3.92

Cited by 32 publications

(9 citation statements)

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“…1, 2, 4, 5). The magnitude of the split in v, for RbNO, and CsNO, is similar to that observed for NH,NO,(V) (9), which has since been shown to have nitrate ions on general sites (47).…”

Section: Frequency Cm-'supporting

confidence: 72%

Crystalline-field effects on the infrared and Raman spectra of powdered alkali-metal, silver, and thallous nitrates

Brooker¹,

Irish²

1970

Can. J. Chem.

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Infrared and Raman spectra have been recorded for room-temperature-phase, powdered samples of LiNO,, NaNO,, KNO,, RbNO,, CsNO,, AgNO,, and TINO,. For the trigonal systems, the nitrate pairs LiNO,, NaNO, and RbNO,, CsNO, give almost identical spectra. For the orthorhombic systems, AgNO, and TINO, give similar spectra, whereas that of KNO, is significantly different. Site and correlation field perturbations are considerably more pronounced in the antisymmetric stretching region (v, ca. 1400 cm-') than in the antisymmetric bending region (v4 ca. 700 cm-I). Although lifting of the degeneracy of E' modes was frequently observed, the reported split of the v4(E1) mode (ca. 716 cm-I) of the aragonite form of KNO, could not be confirmed. Multiple internal reflectance techniques have been employed to observe the extremely intense v,(E') infrared fundamental ca. 1400 cm-'.

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“…1, 2, 4, 5). The magnitude of the split in v, for RbNO, and CsNO, is similar to that observed for NH,NO,(V) (9), which has since been shown to have nitrate ions on general sites (47).…”

Section: Frequency Cm-'supporting

confidence: 72%

Crystalline-field effects on the infrared and Raman spectra of powdered alkali-metal, silver, and thallous nitrates

Brooker¹,

Irish²

1970

Can. J. Chem.

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“…The crystal structures of the various phases have been studied: I by X-ray powder diffraction (Hendricks, Posnjak & Kracet, 1932); V by single-crystal X-ray diffraction (Amoros, Arrese & Canut, 1962); IV by single-crystal neutron diffraction (Choi, Mapes & Prince, 1972); III by single-crystal X-ray diffraction using AN(KNO3) solid solutions (Holden & Dickinson, 1975); and II by powder neutron diffraction using ND4NO3 (Lucas, Ahtee & Hewat, 1979).…”

Section: Introductionmentioning

confidence: 99%

Phase transitions in ammonium nitrate

Choi¹,

Prask²,

Prince³

1980

J Appl Crystallogr

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The phases of ammonium nitrate, NH4NO3, doped with small amounts of NiO or CuO have been studied by X-ray and neutron diffraction at various temperatures from 80 to 423 K. NH4NO3 with metal-oxide additives, which are believed to form complexes, exists as a solid solution. Phase IV is stable down to 140 K in the NiO-doped samples and 210 K in the CuO-doped sample. The thermal expansion of this phase is extremely anisotropic, with the b axis expanding rapidly with increasing temperature while the a axis contracts slightly. At higher temperatures the doped samples transform directly from phase IV to phase II, bypassing phase III, starting at about 328 K. The structure of phase II, which is disordered, was refined in the space group P4/mbm. The structure of phase III contains hydrogen-bonded chains parallel to the b axis.

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“…Five distinct phases with reversible transitions between them in the sequence V-IV-III-II-I have been reported (Nagatani, Seiyama, Sakiyama, Suga & Seki, 1967). At room temperature, phase IV has an orthorhombic crystal structure (Choi, Mapes & Prince, 1972), which transforms to a tetragonal phase V structure (Amor6s, Arrese & Canut, 1962) when cooled below 255 K. On heating above room temperature, transitions occur to an orthorhombic phase III structure at 305.3 K (Goodwin & Whetstone, 1947), a tetragonal phase II structure at 357 K and to a cubic phase I structure above 328 K (Ahtee, Kurki-Suonio, . The corresponding transitions have been found also for deuterated ammonium nitrate, the transition temperatures being only slightly affected by deuteration (Juopperi, 1972).…”

Section: Introductionmentioning

confidence: 99%