hornblende 音标拼音: [h'ɔrnbl
, ɛnd]
n . 角闪石
角闪石
hornblende n 1 :
a green to black mineral of the amphibole group ;
consists of silicates of calcium and sodium and magnesium and iron Hornblende \
Horn "
blende `\,
n . [
G .,
fr .
horn horn blende blende .] (
Min .)
The common black ,
or dark green or brown ,
variety of amphibole . (
See {
Amphibole }.)
It belongs to the aluminous division of the species ,
and is also characterized by its containing considerable iron .
Also used as a general term to include the whole species .
[
1913 Webster ]
{
Hornblende schist } (
Geol .),
a hornblende rock of schistose structure .
[
1913 Webster ]
Amphibole \
Am "
phi *
bole \ ([
a ^]
m "
f [
i ^]*
b [=
o ]
l ),
n . [
Gr .
'
amfi `
bolos doubtful ,
equivocal ,
fr . '
amfiba `
llein to throw round ,
to doubt :
cf .
F .
amphibole .
Ha ["
u ]
y so named the genus from the great variety of color and composition assumed by the mineral .] (
Min .)
A common mineral embracing many varieties varying in color and in composition .
It occurs in monoclinic crystals ;
also massive ,
generally with fibrous or columnar structure .
The color varies from white to gray ,
green ,
brown ,
and black .
It is a silicate of magnesium and calcium ,
with usually aluminium and iron .
Some common varieties are {
tremolite },
{
actinolite }, {
asbestus }, {
edenite }, {
hornblende } (
the last name being also used as a general term for the whole species ).
Amphibole is a constituent of many crystalline rocks ,
as syenite ,
diorite ,
most varieties of trachyte ,
etc .
See {
Hornblende }.
[
1913 Webster ]
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