scholarly journals Synthesis and reactivity of rare-earth metal phosphaethynolates

2018 ◽  
Vol 47 (37) ◽  
pp. 13016-13024 ◽  
Author(s):  
Sebastian Bestgen ◽  
Qien Chen ◽  
Nicholas H. Rees ◽  
Jose M. Goicoechea
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Oxidation States ◽  
Coordination Modes ◽  
Ionic Intermediates ◽  
Coordination Behaviour

The reactivity and coordination behaviour of OCP− towards three rare-earth elements: Y, Nd and Sm, was investigated. Mono- and bis-phosphaethynolate complexes in different oxidation states were prepared, leading to novel coordination modes of OCP− and ionic intermediates of Sm(ii) in the presence of 18-crown-6 or 2,2,2-crypt.

scholarly journals STUDI DISTRIBUSI MINERAL IKUTAN TIMAH (MIT) UNTUK MENDUKUNG METODA PENANGANAN SAMPEL PADA KEGIATAN EKSPLORASI

2020 ◽  
Vol 1 (1) ◽  
pp. 797-806
Author(s):  
Syafrizal Syafrizal ◽  
Andika Satria Pradana ◽  
Ichwan Azwardi ◽  
Satyogroho Dian Amertho ◽  
Mohamad Nur Heriawan ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Operating Procedure ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Standard Operating Procedure ◽  
Metal Extraction ◽  
Sample Handling ◽  
Standard Operating ◽  
Tin Metal

ABSTRAK PT. Timah Tbk merupakan perusahaan yang memiliki Izin Usaha Pertambangan (IUP) logam timah yang berencana menjadikan komoditas logam tanah jarang sebagai by-product dari ekstraksi logam timah sebagai komoditas utama. Telah diteliti bahwa Mineral Ikutan Timah (MIT) pembawa Rare Earth Elements (REEs) yang jumlahnya cukup dominan pada setiap sampel pemboran yang sudah dilakukan PT Timah Tbk diantaranya adalah ilmenite, rutile, zircon, monazite, xenotime, dan anatase. Eksplorasi terhadap logam timah terus dilakukan oleh PT Timah Tbk. Namun, eksplorasi khusus untuk setiap Mineral Ikutan Timah (MIT) pembawa Rare Earth Elements (REEs) hanya sebatas pada dokumentasi kadar mineral-mineral pembawa REEs pada sampel pemboran saja. Oleh karena itu, pada kesempatan ini, peneliti bertujuan untuk melakukan studi dan analisis distribusi mineral pembawa REEs untuk mencari aspek-aspek penting yang harus diperhatikan oleh PT Timah Tbk dalam merancang SOP (Standar Operasi Prosedur) preparasi hasil sampling eksplorasi yang tepat untuk ekstraksi mineral cassiterite tanpa mengabaikan kehadiran mineral pembawa REEs yang prospek untuk ditambang. Data-data yang digunakan peneliti berasal dari sampel-sampel primer, aluvial, konsentrat, dan tailing yang ada pada setiap daerah yang kemudian dilakukan kuantifikasi kadar mineral-mineral pembawa REEs dengan metode grain counting. Tahap selanjutnya adalah rekapitulasi, pengolahan data, dan penyajian data menggunakan metode-metode statistik. Lalu, akan dilakukan pembahasan, analisis, serta penarikan kesimpulan berdasarkan hasil pengolahan data yang menjawab rumusan masalah dan tujuan dari penelitian ini. Kata kunci :   Mineral Ikutan Timah (MIT), Rare Earth Elements (REEs), Grain Counting, Standar Operasi Prosedur, Sampling Eksplorasi.  ABSTRACT PT Timah Tbk is a state-owned company that has tin metal Mining Business License or well known as Izin Usaha Pertambangan (IUP) which plans to make rare earth metal commodities as a by-product of tin metal extraction as the main commodity. Based on research,  REEs (Rare Earth Elements)-bearing minerals quite dominant in each drilling sample by PT Timah Tbk which are ilmenite, rutile, zircon, monazite, xenotime, dan anatase. Exploration of tin metal still continues by PT Timah Tbk. Nevertheless, the exploration of Rare Earth Metal (REM) is limited to the REEs-bearing minerals grade documentation in the drilling sample only. Therefore, on this occasion, writer aims to study and analyze the distribution of REEs-bearing minerals to look for important aspects that must be considered by PT Timah Tbk in designing the right SOP (Standard Operating Procedure) of exploration sample handling result for cassiterite mineral extraction without ignoring the presence of REEs-bearing minerals that are prospects to be mined. The data which used by the writer originated from primary, alluvial, concentrate, and tailing samples that exist in each region which then quantified the grade of  REEs-bearing minerals using grain counting method. The next step is recapitulation, processing data, and presenting data using statistical methods. Then, discussion, analysis, and conclusions will be conducted based on results of data processing that answer the problem formulation and the purpose of this study.  Keyword    : By-product of tin metal extraction, Rare Earth Elements (REEs), Grain Counting, Standard Operating Procedure, exploration sample handling. 

Synthesis, characterization, and reactivity of dinuclear organo-rare-earth-metal alkyl complexes supported by 2-amidate-functionalized indolyl ligands: substituent effects on coordination and reactivity

2019 ◽  
Vol 48 (16) ◽  
pp. 5230-5242 ◽  
Author(s):  
Dongjing Hong ◽  
Xiancui Zhu ◽  
Shaowu Wang ◽  
Yun Wei ◽  
Shuangliu Zhou ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Substituent Effects ◽  
Earth Metal ◽  
Dinuclear Complexes ◽  
Coordination Modes ◽  
Alkyl Complexes

Different coordination modes and activities of the dinuclear complexes with the functionalized indolyl ligands were found.

Peculiarities of the synthesis, structure and properties of ET radical cation salts prepared in the presence of the rare-earth metal complex anions

2004 ◽  
Vol 114 ◽  
pp. 527-528 ◽  
Author(s):  
N. D. Kushch ◽  
A. V. Kazakova ◽  
L. I. Buravov ◽  
A. N. Chekhlov ◽  
E. B. Yagubskii
Keyword(s):  
Rare Earth ◽  
Metal Complex ◽  
Radical Cation ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Structure And Properties ◽  
Rare Earth Metal Complex ◽  
Radical Cation Salts ◽  
Complex Anions ◽  
The Rare Earth

Influence of the introducing rare-earth metal on the strength of the aluminum electrodes

2020 ◽  
pp. 39-47
Author(s):  
I. Yu. Gots ◽  
◽  
V. O. Lukyanova ◽  
◽  
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Aluminum Electrodes

Phase selectivity and tunable photophysical nature of rare earth metal–organic frameworks of EuxY1−x-PTC (H3PTC = 2,4,6-pyridine tricarboxylic acid; x = 0–1)

2020 ◽  
Vol 49 (42) ◽  
pp. 14985-14994
Author(s):  
Xu-Sheng Gao ◽  
Mei-Juan Ding ◽  
Jin Zhang ◽  
Li-Duo Zhao ◽  
Xiao-Ming Ren
Keyword(s):  
Rare Earth ◽  
Solid Solutions ◽  
Rare Earth Metal ◽  
Metal Organic Frameworks ◽  
Earth Metal ◽  
Tricarboxylic Acid ◽  
Excitation Wavelength ◽  
Metal Organic ◽  
Phase Selectivity

All solid solutions (EuxY1−x-PTC, x = 0.013–0.82) are isomorphic to Eu-PTC, but different from Y-PTC, and show phase selectivity as well as excitation wavelength dependent emission.

scholarly journals Experimental Investigation of WE54 magnesium rare earth metal alloys by ageing treatment

2021 ◽  
Vol 1104 (1) ◽  
pp. 012025
Author(s):  
Sachendra ◽  
Shailesh Kumar Singh ◽  
Ujjwal ◽  
Satyajeet Kumar ◽  
Kuldeep Singh
Keyword(s):  
Experimental Investigation ◽  
Rare Earth ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Metal Alloys ◽  
Ageing Treatment

Synthesis of Poly(Ethyl Vinyl Ether) with High Molecular Weight by Rare-Earth Metal Cationic Catalysts

Polymer ◽  
2021 ◽  
pp. 123790
Author(s):  
Yang Jiang ◽  
Shihui Li ◽  
Dongmei Cui
Keyword(s):  
Molecular Weight ◽  
Rare Earth ◽  
High Molecular Weight ◽  
Vinyl Ether ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Ethyl Vinyl Ether ◽  
Ethyl Vinyl
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