HIGH PURITY RARE EARTHS Available in quantities at surprisingly low cost a report by LINDSAY A few months ago, in one of these re ports, we presented this table of high purity rare earth and yttrium oxides. We anticipated inquiries, of course, but the flood of letters requesting detailed information really startled us. What interests us particularly, and will you, is the fact that so many re search people are intrigued with the practical possibilities of these unique materials. The large amount of research now being done on high purity rare earth oxides in a wide variety of indus tries encourages us to suggest the likelihood that they may offer you op portunities for potentially profit . _ in vestigation. Already, in a little more than two years since rare earths in purities up to 99.99% became available in commer cial quantities, they are being used as basic production materials in many chemical and industrial operations.
TYPICAL MAXIMUM IMPURITIES IN LINDSAY PURIFIED RARE EARTH AND YTTRIUM OXIDES ATOMIC NO.
OXIDE
57
La203.
LANTHANUM OXIDE
58
Ce0 2 .
CERIC OXIDE
59
Pr60M.
PRASEODYMIUM OXIDE
60
Nd303.
NEODYMIUM OXIQE
62
Sm20j.
SAMARIUM OXIDE
63
Eu203.
EUROPIUM OXIDE
64
Gd 2 0 3 ·
GADOLINIUM OXIDE
65
Tb407.
TERBIUM OXIDE
66
Dy203.
DYSPROSIUM OXIDE
67
Ho203.
PURITY
528 529
99.99 99.997
0.01 Pr, 0.001 Ce. 0.0025 Pr, 0.0005 others
215 1
99.8 99.9
0.2 (largely La +• Pr -h Nd). 0.1 (largely La -f- Pr -f Nd).
1
216 726
99
1 1
729.9
99.9
1 La + Nd + smaller amounts of Ce and Sm. 0.1 Ce + Nd.
628 629 629.9
95 99 99.9
1-4 Pr, 1-4 Sm, 0.5-1 others. 1 0.1-0.4 Pr + 0.1-O.4 Sm + 0.5 others. 0.1 (largely Pr -f Sm).
822
99
823
99.9
0.2-0.7 Gd, O.20.6 Eu, and smaller amounts of others. 0.1 (largely Nd -H Gd 4- Eu).
mm
*5ί*«^3**^
1011
99.8
1-2 Sm + smaller amounts o f Nd - H Gd + others. 1 0.2 (largely Sm + Gd +- Nd).
99 99.9
1 Sm + Eu + trace T b . 0.1 Sm + Eu + trace T b .
1803 1805
99 99.9
1 Gd + Dy + Υ. 0.1 Gd + Dy + Y .
Ι
1703
99
1
1"
99.9
1 (largely Ho + Y + Tb + small amounts of others). 0.1 Ho + Y - f traces of others.
1603
99
1605
99.9
1 (largely Er + Dy -f small amounts of others). 0.1 Er + Dy + traces o f others.
928.9 929.9
HOLMIUM OXIDE
68
Er203.
ERBIUM OXIDE
1303 1305
99 99.9
1 Ho + Dy + traces Yb and Υ . 0.1 Ho + Tm.
Ι
69
Tm703.
THULIUM OXIDE
1405 1403
99.9 99
0.1 Er + Yb + trace L u . 1 Er + Yb + trace Lu
1
70
Yb203.
YTTERBIUM OXIDE
1201 1202
99 99.9
1 Er + Tm + trace L u . 0.1 Tm + trace Lu + E r .
71
Lu203.
LUTETIUM OXIDE
1503 1505
99 99.9
1 Yb •+- Tm -J- traces of others. 0.1 Yb + Tm + traces of others.
39
Y203.
YTTRIUM OXIDE
1112 1115 1116
99 99.9 99.9 +
1 Dy + Gd + traces Tb and others. 0.1 Dy + Gd + traces Tb Approx. 0.05 Dy + Gd.
ί
F o r detailed information and prices, w r i t e f o r o u r bulletin "Purified Rare Earth and Y t t r i u m O x i d e s "
L I N I ) S A Y (jHEMICAL (pMPANY" éflwt/fà C&i0eo/ çZwcwacc&^QHÎotaema^ŒfL&ie 266 ANN STREET · WEST CHICAGO, ILLINOIS
50
C&EN
FEB.
24,
19 58
1 1
98-99
PLEASE ADDRESS INQUIRIES T O .
%$È$^
1
1012
