The crystal and molecular structure of ammonium citrate dihydrate [(NH4)+Bi(C6H4O7)-].2H2O has been established by means of X-ray diffraction on a single crystal using CuK-alpha-radiation. The crystals are monoclinic, space group C2/c wi... Wolfgang,A.,Herrmann,... - Zeitschrift für ...
The local structure of LaMnO3 across the Jahn-Teller (JT) transition at T(JT)=750 K was studied by means of x-ray absorption near edge structure and extended x-ray absorption fine structure at the Mn K-edge. Our results indicate a similar electronic local structure for Mn atoms above and...
Rapid autoxidation forms highly oxidized RO2 radicals in the atmosphere Angew. Chem. Int. Ed., 53 (2014), pp. 14596-14600 Google Scholar Lindinger et al., 1998 W. Lindinger, A. Hansel, A. Jordan On-line monitoring of volatile organic compounds at pptv levels by means of Proton-Transfer-...
Abstract The chemistry of the (NH4)2S x ‐treated n‐GaAs (100) surfaces has been studied using synchrotron radiationphotoemissionspectroscopy. Ga 3d, As 3d, and S 2pphotoemissionspectra are measured before and after annealing in vacuum with a photon energy of about 210 eV, where S 2p core ...
Phase transitions in triammonium hydrogen disulfate (NH4)3H(SO4)2 were studied by means of dielectric measurements and differential thermal analysis. Below... K Gesi - 《Physica Status Solidi》 被引量: 190发表: 1976年 H-bonding dependent structures of (NH4+)3H+(SO4 2-)2. Mechanisms of phas...
Structural units in complexes I and II are mononuclear [UO 2 (CH 3 COO) 3 ] moieties, which belong to the AB 3 01 crystallochemical group (A = UO 2 2+ B 01 = CH 3 COO complexes are linked into a framework by means of electrostatic interactions with outer-sphere ions and by ...
Appropriate 螖H values obtained by means of solution calorimetry lead to 螖H掳f = -251.7 kcal. per mole for NH4VO3(c) and 螖H掳f = -274.2 kcal. per mole for NaVO3(c). These values are compared with results in the literature and used for ... GL Bertrand,LG Hepler - 《Journal of...
In particular, fluorides react strongly with compounds containing calcium, magnesium, or silicon ions, which means that solutions containing soluble fluorides are corrosive to both living tissue and glass. Hydrofluoric acid can cause severe chemical burns and is one of the few materials that can etch...
In this review, we discuss the major themes of NH 4 + toxicity, including the occurrence of NH 4 + in the biosphere, response differences to NH 4 + nutrition among wild and domesticated species, symptoms and proposed mechanisms underlying toxicity, and means by which it can be alleviated. ...
Modified compositions in the system V2O5/(NH4)2Mo2O7 have been prepared by means of mechanochemical, hydrothermal, microwave and ultrasonic treatments in aqueous medium. Chemical and phase transformations occurring on the stages of modification and following calcinations have been studied with the help ...