[en] The synthesis and certification of CRM of rare earth elements (REE) oxide resulting from xenotime sand by ISO 13528-2008 and ISO 35-2006 has been done. CRM of rare earth elements (REE) oxide resulting from xenotime sand processing is necessary to support the pilot plant activity of the impurity of rare earth element oxide produced in PSTA-BATAN. The synthesis and certification of REE-oxide CRM is done by using REE-oxide as a result of xenotime sand from Bangka. Xenotime sand was smelted with NaOH, Na2CO3 and KHCO3 in furnaces at 700 °C for 3 hours. Fused sand xenotime was leached with water, so that the formed deposits of red brown. Precipitated was leached with concentrated HCl, BaCl2, Na2SO4 and Na2S, then obtained deposits of thorium sulfate and the filtrate is REE-chloride. REE-chloride is precipitated as REE-hydroxide with NaOH, then the filtrate is deposited as REE-oxalate with oxalic acid. REE-hydroxide and REE-oxalate was calcined at 700 °C for 3 hours, so formed REE- oxides. REE-oxide is dried at 110 °C, crushed and sieved until the powder is obtained with grain size of 200 mesh. REE-oxide powder is homogenized, then water content test, homogeneous test, stabilization test and characterization test are conducted. In the evaluation of data obtained CRM REE oxide candidate that has been homogeneous, stable, contain chemical compounds yttrium uranium oxide (Y1.92U2.08O8.43), ytterbium vanadium oxide (YbVO3), cerium formate (C3 H3CeO6), cerium yttrium silicon (CeY4 Si4) and water content <1 %. So the REE-oxide powder is already qualified physically as CRM. Certificate of parameter test results in CRM LTJ-oxide from 7 laboratories accredited with ISO 35-2006 statistical methods obtained 25 oxides and chloride. Y2O3 concentration in the CRM of REE-oxide resulting from xenotime sand (6,802 ± 0,057) % are bigger then Y2O3 concentration in the CRM of CeO2 resulting from monazite sand (1.181 ± 0.001) %. CRM of REE- oxide can be used as standard material on the impurities determination of REE from pilot plant result. (author)
Source
Kusminarto (ed.) (FMIPA-UGM, Yogyakarta (Indonesia)); Dwi Wahini Nurhayati (ed.) (BBKKP, Deperindag, Yogyakarta (Indonesia)); Prayitno; Darsono; Syarip; Samin; Tri Mardji Atmono; Dwi Biyantoro; Herry Poernomo; Tjipto Sujitno; Gede Sutresna W; Slamet Santosa; Djoko Slamet Pujorahardjo; Bambang Siswanto; Endro Kismolo; Jumari (Center for Accelerator Science and Technology, National Nuclear Energy Agency, Yogyakarta (Indonesia)) (eds.); Center for Accelerator Science and Technology, National Nuclear Energy Agency, Yogyakarta (Indonesia); [436 p.]; ISSN 0216-3128; 
; Nov 2017; p. 129-138; The meeting and scientific presentations on basic science research and nuclear technology; Pertemuan dan presentasi ilmiah penelitian dasar ilmu pengetahuan dan teknologi nuklir; Yogyakarta (Indonesia); 28 Nov 2017; Also available from Center for Utilization of Informatics and Region Strategic Nuclear, National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560895, Serpong, Tangerang Selatan 15314 (ID); 11 refs.; 14 tabs.; 1 fig.
; Nov 2017; p. 129-138; The meeting and scientific presentations on basic science research and nuclear technology; Pertemuan dan presentasi ilmiah penelitian dasar ilmu pengetahuan dan teknologi nuklir; Yogyakarta (Indonesia); 28 Nov 2017; Also available from Center for Utilization of Informatics and Region Strategic Nuclear, National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560895, Serpong, Tangerang Selatan 15314 (ID); 11 refs.; 14 tabs.; 1 fig.
[en] Leaching of Y decomposition results of xenotime sand using Na2CO3 and NaHCO3 has been carried out. This process includes roasting xenotime sand with Na2CO3 and NaHCO3 and the dissolution process using HCl. To determine the success of the leaching process used yttrium (Y) as a metal representation of rare earth metals. Variables that influence the effectiveness of decomposition include weight ratio of sand with the weight of reagent, roasting temperature, HCl concentration and stirring time. From the results of the study obtained the results of Y were optimum dissolved on weight ratio of xenotime sand and 5 :1 reagent weight, roasting temperature 800 °C, dissolution at 1.5 M HCl concentration and 4 hours stirring time. Decomposition results using NaHCO3 gave Y leaching results better (6.68 %) compared to Na2CO3 reagent (6.32 %). (author)
Source
Sugiman; Mirmanto (Universitas Mataram (UNRAM), Nusa Tenggara Barat (Indonesia)) (eds.); Retno Gumilang Dewi (ed.) (Institut Teknologi Bandung (ITB), Bandung (Indonesia)); Eko Budi Lelono (ed.) (Lembaga Minyak dan Gas (LEMIGAS), Jakarta (Indonesia)); Heni Susiati; Sahala Maruli Lumban Raja; Edwaren Liun; Erlan Dewita; Wiku Lulus Widodo; Sunarko; Imam Bastori; Tagor Malem Sembiring; Susetyo Trijoko; Nuryanti; Dharu Dewi; Yuliastuti (BATAN, Jakarta (Indonesia)) (eds.); Center for Nuclear Energy Systems, National Nuclear Energy Agency, Jakarta (Indonesia); [520 p.]; ISSN 2621-3125; ; Oct 2018; 7 p; National Seminar on Nuclear Energy Infrastructure; Seminar Nasional Infrastruktur Energi Nuklir; Yogyakarta (Indonesia); 25 Oct 2018; Also available from Center for Utilization of Informatics and Region Strategic Nuclear, National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560895, Serpong, Tangerang Selatan 15314 (ID); 11 refs.; 4 tabs.; 4 figs.
; Oct 2018; 7 p; National Seminar on Nuclear Energy Infrastructure; Seminar Nasional Infrastruktur Energi Nuklir; Yogyakarta (Indonesia); 25 Oct 2018; Also available from Center for Utilization of Informatics and Region Strategic Nuclear, National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560895, Serpong, Tangerang Selatan 15314 (ID); 11 refs.; 4 tabs.; 4 figs.