Dana's Manual of Mineralogy.pdf

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It
was
found
that
it
was
desirable
to
rewrite
the
book,
and
consequently,
as
far
minerals
which
it
principles
of
the
subject.
A
crystal
has
been
defined
fundamental laws
form
which
ISOMETRIC SYSTEM
The
name
tetra-
hexahedron
hedron had
zontal
follows:
1.
Prism
of
form
consisting
HEXAGONAL SYSTEM
^~
HEXAGONAL SYSTEM
is
the other two
to
which
a
crystals
the
follow-
ing
terms
may
be
used:
a.
Crystallized.
In
definite
crystals
(see
mineral
can
be
split
into
exceedingly
thin
sheets,
any
peculiar
structure
a
parting.
This
phenomenon
resembles
cleavage,
but
is
to
be
distinguished
from
it
by
the
facts
that
not
every
specimen
specimen
to
a
very
convenient
and
quite
accurate
method
of
light upon
would
be,
galena,
PbS,
with
a
bluish
gray
color
in
their
different
specimens.
This
of
the
surface
differs
from
III. CHEMICAL
these
to
other
in
the
molecule
is
obtained,
over,
losing
its
which
is
listed
as
3
tube
TESTS FOR
presence
of
magnesium
(see
page
103);
Barium
Hydroxide,
Ba(OH)
2
two
parts.
To
molybdate
separating
as
the
dioxide,
Si0
2
frequently
complicated
by
the
presence
of
lead,
heated
intensely
by
the
blowpipe
flame,
the
burning
in
the
flame
and
characteristic
associations.
The
localities
at
known
a
stone
which
has
its
upper
surface
covered
with
small
triangular
facets.
Its
lower
surface
may
be
one
a
Greek
word
meaning
masculine,
a
term
first
applied
occurring
in
sulphate.
Determined
chiefly
by
its
high
pure,'
and
green
when
nearly
so.
Commonly
yellow,
bead
reddish
brown
(nickel).
Closely
resembles
pyrrhotite
in
appearance
but
to
be
give
steel-gray
to
grayish
black.
Found
in
some
quantity
more
than
10
per
cent
of
the
rock
mass.
The
impure
corundum,
known
as
emery,
Occurs
as
thin
plates
and
dendritic
growths
between
plates
of
mica.
Often
inti-
mately
associated
with
corundum,
forming
the
alloy
of
a
small
extent
in
bluish
green
opaque
bead
limonite.
Diaspore.
Composition.
AIO(OH)
or
A1
PLATE VII.
(15
per
cent).
Charac-
terized
chiefly
by
its
structure
and
yellow-brown
streak.
Occurrence.
Limonite
acid
which
they
contain.
meaning meadow,
crystallization.
All
of
them
appear
together.
Fused
feldspar
also
molecule,
CaAl
2
Si
2
8
formation
of
a
jelly.
Addition
meaning
white.
Pollucite,
H
2
Cs2Al
2
(Si03)
6
thought
low
clinodome
(Figs.
304
and
305).
Structure.
In
crystals.
Often
bladed
and
frequently
in
radi-
ating
columnar
aggregates.
Sometimes
in
silky
fibers.
Coarse
to
fine
granular.
Compact.
Physical
Properties.
Perfect
prismatic
cleavage
at
angle
of
125,
often
yielding
a
splintery
grayish
green.
TOPAZ 255
a clear
pyra-
Fig
Bourg
d'Oisans
in
Dauphine;
St.
Just,
Cornwall;
Obira,
Japan;
Franklin
Furnace,
New
Jersey,
etc.
Name.
Derived
most
common
and
charac-
teristic
a
jelly.
Solu-
tion
gives
little
or
no
precipitate
with
ammonia
but
gives
an
ANALCITE 269
color
of
beautiful
variegated
coloring.
Frequently
called
verd
antique
marble.
manganese.
Tri-
phylite
corresponds
to
LiFePO
4
coal
gives
a
globule
which
on
cooling
shows
sodium
in
small
mineral
and
then
their softness.
by
a
brief
general
discus-
sion
of
given
in
it
and
by
a
short
statement
The usual
small
amounts
in
casting
steel
in
order
to
take
up
in
welding
iron
and
steel.
Sheets
from
the
smelting
as
linings
for
metallurgical
furnaces.
Various
red,
orange
and
green
pigments
and
dyes
by-product.
The
only
source
of
cobalt
at
present
in
the
United
undergone
secondary
enrichment,
and
replacement
veins
in
a
granitic
rock.
The
in
Sonora,
etc.;
in
discussion of
the occur-
yellow
and
red
paints.
Lead
acetate,
them.
The
important
ores
of
silver
can
materials
in
fluxing
which
permitted
some
crystals
to
grow
to
considerable
types.
II.
Sedimentary
Rocks.
Sedimentary
rocks
are
secondary
in
their
origin,
the
materials
a
a soft
are not elastic.
ACCESSORY ROCK-MAKING
open up
rock material must
mineralogy. Pegmatite
VEINS AND
oxidized
compounds
and
include
the
following:
cerussite,
PbC0
3
, anglesite,
PbS0
4
Classification of the
by
the
that
the
cent
cannot
could
be
closely
deter-
mined,
would
frequently
be
of
great
assistance
in
SUBMETALLIC LUSTER.
METALLIC OR
METALLIC OR
METALLIC OR
II. Can
be scratched
obtained
in
the
nature
total
production
is
comparatively
in
the
United
States
in
recent
years.
The
value
of

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Dana's Manual of Mineralogy.pdf

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