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Mechanochemical Changes of Weinschenkite‐Type RPO 4 ·2H 2 O (R = Dy, Y, Er, or Yb) by Grinding and Thermal Reactions of the Ground Specimens
Author(s) -
Hikichi Yasuo,
Sasaki Toshio,
Murayama Kyouhei,
Nomura Tsuyoshi,
Miyamoto Masaaki
Publication year - 1989
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1989.tb06276.x
Subject(s) - grinding , chemistry , type (biology) , analytical chemistry (journal) , mineralogy , nuclear chemistry , materials science , metallurgy , environmental chemistry , geology , paleontology
It is reported that, on mechanochemical treatment, weinschenkite‐type RPO 4 ·2H 2 O (R = Dy, Y, or Er) gradually transforms into rhabdophane‐type RPO 4 · nH 2 O (n = 0.5 to 1) and weinschenkite‐type YbPO 4 ·2H 2 O into xenotime‐type YbPO 4 , at room temperature in air. Rhabdophane‐type YPO 4 ·0.8H 2 O and ErPO 4 ·0.9H 2 O obtained by grinding weinschenkite‐type RPO 4 ·2H 2 O (R=Y or Er) are new. The new rhabdophane‐type YPO 4 ·0.8H 2 O and ErPO 4 ·0.9H 2 O gradually transform to xenotime‐type YPO 4 and ErPO 4 when heated above 900°C (R = Y) and 700°C (R = Er) in air.