scholarly journals Synthesis of Rare Earth Element-Iron-Oxygen Ultrafine Particles by Using Inductively Coupled Plasma-Relation between Ionic Radius of Rare Earth Element and Products-

2003 ◽  
Vol 40 (10) ◽  
pp. 720-728 ◽  
Author(s):  
Masami Sugasawa ◽  
Nobuyuki Kikukawa ◽  
Yoshinobu Nagano ◽  
Naoyuki Kayano ◽  
Takayasu Kimura
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Inductively Coupled Plasma ◽  
Ultrafine Particles ◽  
Ionic Radius ◽  
Earth Element ◽  
Inductively Coupled

scholarly journals First occurrence of moskvinite-(Y) in the Ilímaussaq alkaline complex, South Greenland – implications for rare-earth element mobility

2016 ◽  
Vol 80 (1) ◽  
pp. 31-41 ◽  
Author(s):  
Henrik Friis
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Inductively Coupled Plasma ◽  
Large Scale ◽  
Earth Element ◽  
Theoretical Calculations ◽  
Alkaline Complex ◽  
Inductively Coupled ◽  
First Occurrence ◽  
Plasma Mass Spectrometry

AbstractMoskvinite-(Y), Na2K(Y,REE)Si6O15, is a rare mineral, which until now has only been described from its type locality Dara-i-Pioz, Tajikistan. At Ilímaussaq moskvinite-(Y) was discovered in a drill core from Kvanefjeld, where it occurs as a replacement mineral associated with a mineral belonging to the britholite group. The composition was determined by a combination of electron probe microanalysis and laser ablation inductively coupled plasma mass spectrometry analyses. The empirical formula based on 15 oxygens is Na1.94K0.99(Y0.94Yb0.03Er0.03Dy0.03Ho0.01Gd0.01)∑1.05Si5.98O15. The coexistence of an almost pure Y and a light rare-earth element (REE) mineral is interpreted as fractionation ofREEand Y during the replacement of an earlier formedREEmineral. Theoretical calculations of the observed replacement of feldspathoids by natrolite show that the generated fluid would have pH > 8, which inhibits large scale mobility ofREE. In addition, a K-Fe sulfide member of the chlorbartonite-bartonite group is for the first time observed in Ilímaussaq where it occurs where sodalite is replaced by natrolite and arfvedsonite by aegirine. The sulfide incorporates the S and some of the Cl generated by the alteration of sodalite, whereas the K and Fe originates from the replacement of arfvedsonite by aegirine.

scholarly journals Occurrence of rare earth element and yttrium (REY) in Tanjung formation coking coal from Sekako area, Central Kalimantan

2020 ◽  
Vol 200 ◽  
pp. 06008
Author(s):  
Hendra Amijaya ◽  
Beny Wiranata ◽  
Ferian Anggara
Keyword(s):  
Rare Earth ◽  
Coal Seam ◽  
Rare Earth Element ◽  
Inductively Coupled Plasma ◽  
Earth Element ◽  
Atomic Spectroscopy ◽  
Coking Coal ◽  
Central Kalimantan ◽  
Inductively Coupled ◽  
Point Of Interest

Inorganic geochemistry of coal become a point of interest on coal study, especially relating with the occurrence of rare earth element. Tanjung Formation is one of coking coal bearing deposits in Barito Basin, Central Kalimantan. The aims of this study to determine the occurrence of Rare Earth Element and Yttrium (REY) especially in term of concentration and enrichment type in coal seam A and B of Tanjung Formation in Sekako Area, Central Kalimantan. A number of 10 coal samples were collected from both seams. Inductively Coupled Plasma-Atomic Spectroscopy (ICP-AES) analysis was conducted to determine the REY in coal. Based on this study, coal seam A and B generally have very low concentration of REY elements deposits. The REY elements of coal seam A and B in the study area are typically characterized with M and H-type enrichment, which might be caused by the mafic basalt rocks in the surroundings.

Sign in / Sign up

Export Citation Format

Share Document