yttrium 音标拼音: ['ɪtriəm]
n . 钇,稀有金属元素,符号
Y 钇,稀有金属元素,符号
Y yttrium 钇
Y ;
YT yttrium 钇
yttrium n 1 :
a silvery metallic element that is common in rare -
earth minerals ;
used in magnesium and aluminum alloys [
synonym :
{
yttrium }, {
Y }, {
atomic number 39 }]
Yttrium \
Yt "
tri *
um \,
n . [
NL .,
from Ytterby ,
in Sweden .
See {
Erbium }.] (
Chem .)
A rare metallic element of the boron -
aluminium group ,
found in gadolinite and other rare minerals ,
and extracted as a dark gray powder .
Symbol Y .
Atomic number 39 .
Atomic weight ,
88 .
9 . [
Written also {
ittrium }.]
[
1913 Webster PJC ]
Note :
Associated with yttrium are certain rare elements ,
as erbium ,
ytterbium ,
samarium ,
etc .,
which are separated in a pure state with great difficulty .
They are studied by means of their spark or phosphorescent spectra .
Yttrium is now regarded as probably not a simple element ,
but as a mixture of several substances .
[
1913 Webster ]
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