The crystal structure of the decomposition product NH4HC2O4 from powder diffraction data
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N. Audebrand
Abstract
The crystal structure of anhydrous ammonium acid oxalate, NH4HC2O4, obtained from the thermal decomposition of the related hemihydrate has been determined from powder diffraction data collected with monochromatic laboratory X-rays, using the capillary technique. The crystal structure is monoclinic, P21/c, Z = 4, a = 4.3629(1) Å, b = 13.5657(1) Å, c = 7.7100(1) Å, β = 102.602(1)° and V = 445.3(1) Å3. The structure has been solved with the direct methods and refined with the Rietveld method, from which the agreement factors Rwp = 8.19% and RB = 5.18% have been obtained. The crystal structure consists of corrugated layers built from seven-fold ammonium coordination polyhedra and connected by oxalate groups. The hydrogen atom positions have been located and the hydrogen bond network is extensively discussed.
© 2002 Oldenbourg Wissenschaftsverlag GmbH
Artikel in diesem Heft
- Editorial
- Optical rotation in RbTiOAsO4 (point group mm2)
- Nitridocompounds of manganese: manganese nitrides and nitridomanganates
- Crystal structure of 12H+-2,4-benzo-1,5-dioxa-8,12,16-triaza-cyclooctadec-2-ene-7,17-dione picrate
- X-ray crystal structure analysis of lanthanide trihydrogeno hydroxy-1-ethanebis(phosphonate)-1,1,dihydrogeno hydroxy-1ethanebis(phosphonate)-1,1 hemiundecahydrate, Ln{[C(CH3)(OH)(P2O6H3)][C(CH3)(OH)(P2O6H2)]}⋅5.5H2O with Ln = Y, Ho, Er; and energy parametrization of the absorption spectrum of the Er compound
- The crystal structure of the decomposition product NH4HC2O4 from powder diffraction data
- Books Received
Artikel in diesem Heft
- Editorial
- Optical rotation in RbTiOAsO4 (point group mm2)
- Nitridocompounds of manganese: manganese nitrides and nitridomanganates
- Crystal structure of 12H+-2,4-benzo-1,5-dioxa-8,12,16-triaza-cyclooctadec-2-ene-7,17-dione picrate
- X-ray crystal structure analysis of lanthanide trihydrogeno hydroxy-1-ethanebis(phosphonate)-1,1,dihydrogeno hydroxy-1ethanebis(phosphonate)-1,1 hemiundecahydrate, Ln{[C(CH3)(OH)(P2O6H3)][C(CH3)(OH)(P2O6H2)]}⋅5.5H2O with Ln = Y, Ho, Er; and energy parametrization of the absorption spectrum of the Er compound
- The crystal structure of the decomposition product NH4HC2O4 from powder diffraction data
- Books Received
