Resinous
to ada-
mantine


1-1.6


6.662


1


Iso. ; us. mass.
F. uneven; sec-
tUe




Grn. or yel.
Resinous
to ada-
mantine


1-1.6


6.31-5.81


1


Iso. ; us. mass.
F. uneven; sec-
tile




Grn. or yel.
Resinous
to ada-
mantine


2-3


6.8-6.0


1


Iso. ; us. mass.
F. uneven; sec-
tile




Yel. to larnh.
and bmh.
Resinous
to ada-
mantine


1.5


5.6-5.7


1


Hex. ; hemimor.
C. basal, per.;
sectile



ON 12.
Wh., grn.,
yel., gry.
Wh., straw-
yel. to grnh.
and gryh.
Dull



Dull to ad-
aman-
tine



4-4.5



6.86-7.67



4.361



1.5



Amorph.,
earthy



Hex. rhom.
C. basal, per.;
scaly, earthy



:>N 13.
•'e)


Lt. to dk. brn.
and gry.
Vitreous;
C. pearly


3.5-4


3.83-3.88


4.5-5


Hex. rhom.;
us. xln.
C. rhom., per.
Brnh-red to
blk.
Dull


5.5-6.5


4.9-5.3


5-5.5


Earthy; reni-
form


F. uneven to
splint.
Fe-blk.
Submetal-
lic to dull


6-7


4.8-5.3


5-5.5


Iso.
P. oct.
F. conch.
Yelh-brn. to
dk.brn.
Silky or
dull


5-5.5


3.6-4.0


5-5.5


Fibr., mass.
F. splint.
Yelh-or redh-
brn. to blk.
Adaman-
tine to
dull


5^5.5


4-4.4


5-5.5


Orth.
C. pinac, per.
Rdh-blk.
St. dk. redh-
brn.
Dull silky
to sub-
metal.
5-6


4.14-4.6


5-5.5


Botry.; in-

crust.
F. splint.
88








SECTION






Name.
Composition.
Sol. in cold HsO; wh. ppt.
BaSO« w. BaCli in HCl
sol. Acid H2O in c.t.
Ferrous iron only


Melanterite

(C:k>pperM)
T534 S941


Fe804.7H,0
(Mg and Mn Iso. w. ]




Ferric iron only; dis-
ting. by phys. char-
acters


Copiapite

T536 S964


Fei(FeOH)t(804)5.
17H,0




Coquimbite

T636 S956


Fei(S04)«.9HfO

(Al too. w. F«)




Ferric Fe only; K
flame; little HsO in
c.t.
Jarosite

T637 S974


K[Fe(0H),],(S04),

(NI too. w. K)


P reao. w.
am. mol.
':• Ferrous

Fe


Mn in borax
bd. Little or
no HiO in c.t.
Li flame.
