X-ray evidence for a new phase in ammonium hydrogen oxalate hemihydrate under pressure
نویسندگان
چکیده
2014 Using an X-ray diamond anvil cell, we have found superlattice reflections, characteristic of the high pressure-low temperature phase III of NH4HC2O4, 1/2 H2O. At 77 K and 0.75 GPa, these peaks are located around each Bragg peaks of phase I at position (h, k, 1 ± 03B4) with 03B4 ~ 0.25. Revue Phys. Appl. 23 (1988) 105-109 FÉVRIER 1988, Classification Physics Abstracts 61.10F 61.50K 62.50 64.70K
منابع مشابه
Allylammonium hydrogen oxalate hemihydrate
In the title hydrated mol-ecular salt, C3H8N(+)·C2HO4 (-)·0.5H2O, the water O atom lies on a crystallographic twofold axis. The C=C-C-N torsion angle in the cation is 2.8 (3)° and the dihedral angle between the CO2 and CO2H planes in the anion is 1.0 (4)°. In the crystal, the hydrogen oxalate ions are linked by O-H⋯O hydrogen bonds, generating [010] chains. The allyl-ammonium cations bond to th...
متن کاملInteraction of Celestine Concentrate and Reagent Grade SrSO4 with Oxalate Solutions
The interaction of reagent grade strontium sulphate and celestine concentrate with aqueous solutions of oxalic acid, sodium oxalate and ammonium oxalate for the production of strontium carbonate were investigated for different oxalate compound:SrSO4 mole ratios and reaction times using x-ray diffraction analysis and dissolution tests. Under the same experimental conditions, it was found that aq...
متن کاملForty Years of X-Ray Binaries
In 2012 it was forty years ago that the discovery of the first X-ray binary Centaurus X-3 became known. That same year it was discovered that apart from the High-Mass X-ray Binaries (HMXBs) there are also Low-Mass X-ray Binaries (LMXBs), and that Cygnus X-1 is most probably a black hole. By 1975 also the new class of Be/X-ray binaries was discovered. After this it took 28 years before ESAs INTE...
متن کاملEFFECT OF MISH METAL TYPE ON THE MICROSTRUCTURE AND ABSORPTION/DESORPTION CHARACTERISTICS OF MMNI5 HYDROGEN STORAGE ALLOY
In this article, the effects of Pr and Nd were investigated on the microstructure and absorption/desorption characteristics of MmNi5 hydrogen storage alloy. The alloys were prepared in Vacuum induction furnace and the microstructures and phases were analyzed using scanning electron microscopy (SEM) equipped with energy dispersive X-ray analysis (EDS) and X-ray diffraction (XRD). Hydrogen absorp...
متن کاملSynthesis of WC-8Co cermet powder in WO3-Co3O4-C system by in situ carbothermic solid reduction method under hydrogen atmosphere: (phase, microstructural and thermodynamic analysis)
WC-Co cermets are among the advanced engineering materials that are considered for their special properties such as abrasion resistance and high hardness. The aim of this study was to determine the optimal amount of carbon in raw materials and industrial production of WC-8Co cermet powder from metal oxides WO3, Co3O4 and activated carbon by solid carbothermic reduction method in situ and under ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2016