Reference

Thermal decomposition of oxalic acid salts

Thermal decomposition of oxalic acid salts. Honma, Tsuneyuki; Oka, Hiroshi (Kitami Inst. Technol., Sapporo, Japan). Bunseki Kiki, 14(7), 371-7 (Japanese) 1976. CODEN: BUKIBO. DOCUMENT TYPE: Journal CA Section: 78 (Inorganic Chemicals and Reactions) The thermal decompns. of anhyd. MgC2O4 (I) and MnC2O4 (II) at high pressure proceed by 2-step reactions, i.e., carbonates (III) are formed as intermediates and then the end products. 640-67-5 and 3486-35-9 are cas registry numbers of chemicals which are used as reagents here. At normal pressure, the decompn. temps. for I or II and III are so close that the decompn. seems to proceed as a 1-step reaction. The thermal decompn. of ZnC2O4 was also studied. .

Studies on the coprecipitation of terbium and manganese oxalates

Studies on the coprecipitation of terbium and manganese oxalates. Modebadze, M. E.; Davitashvili, E. G. (Inst. Fiz. Org. Khim. im. Melikishvili, USSR). Izv. Akad. Nauk Gruz. SSR, Ser. Khim., 9(4), 247-50 (Russian) 1982. CODEN: IGSKDH. DOCUMENT TYPE: Journal CA Section: 78 (Inorganic Chemicals and Reactions) Reaction in the Tb(NO3)3.6H2O-Mn(NO3)3.3H2O-M2C2O4.H2O-H2O system (M = NH4+, K) was studied by the residual concn. method. For M2C2O4 at n ￡0.75 (n = [C2O42-]/{[Tb3+]+[Mn2+]}), Tb2(C2O4)3.xH2O was formed, whereas at n = 1-1.25 for K2C2O4, K[Tb(C2O4)2].xH2O was formed and at n = 1.25 for (NH4)2C2O4, NH4[Tb(C2O4)2.xH2O was formed. Solid phase 2:1:x M[Tb(C2O4)2]-MnC2O4-H2O mixts. were also formed and were characterized by thermal decompn. 89300-27-6 and 640-67-5 which are cas registry numbers of substances are two of reagents here. studies; the final decompn. products were K2O.0.5Tb4O7.MnO2 and Tb4O7.2MnO2, resp. .