PHYSICAL PROPERTIES OF PIGMENTS

PIGMENT NAME AND
CHEMICAL COMPOSITION l
Aluminum hydrate, A1(OH)3
Aluminum stearate, Al(Ci8H3502)3
Anhydrite, CaSO*

Antimony oxide, Sb203

Antimony vermilion, Sb2S3
Asphaltum (bitumen), carbonaceous
Azurite, 2CuC03-Cu(OH)2
Barytes (barite, nat.), BaS04

(blanc fixe, art.), BaS04
Barium yellow, BaCrO*
Blue verditer, aCuC03- Cu(OH)2
Bone black, C -f Ca3(P04)2
Cadmium red, CdS(Se)

Cadmium red lithopone, CdS(Se) -f BaS04

Cadmium yellow, CdS

Cadmium yellow lithopone, CdS -f BaS04

Cerulean blue, CoO-»Sn02

Chalk (whiting), CaC03

Charcoal black, C

China clay (kaolinite), Al203-2Si02-2H20

Chrome green (med.), Fe<[Fe(CN)«]s

+ PbCr04

Chrome red, PbCr04«Pb(OH)2
Chrome yellow (med.), PbCr04
Chromium oxide green, opaque, Cr2Oa
Chrysocolla, CuSi03-»H20
Cobalt blue, CoO-Al203
Cobalt green, CoO-«ZnO
Cobalt violet, Co3(P04)2

Cobalt yellow, CoK3(NO2)6-H20

Diatomaceous earth, SiO2

Egyptian blue, CaO-CuO-4Si02

Emerald green, Cu(C2H302)2-3Cu(As02)2

Gamboge, organic resin

Graphite, C

Green earth (celadonite and glauconite),

Fe, Mg, Al, K, hydrosilicate
Gypsum, CaS04 • aH20
Indian yellow, CisHiAiMg^I^O
Iron oxide red (haematite), Fe2O3
Lamp black, C
Lithopone (regular), ZnS (28-30%), BaS04

(72-70%)

Malachite, CuCO3-Cu(OH)2
Manganese blue, BaMn04 + BaS04
Manganese violet, (NH4)2Mn2(P207)2
Massicot (litharge), PbO
Mayan blue, Fe, Mg, Ca, Al, silicate (?)
Mica (muscovite), H2KAl3(Si04)s
Molybdate orange, Pb(Mo, S, Cr, P)04
Naples yellow, P^CSbQJj
Ochre, vellow (soethitel Fe*Os-H*O. clav.

SPECIFIC
GRAVITY 2

PARTICLE
CHARACTERISTICS 3

2.45 v. fine amorph. part.

°-99 aE§" °^ spher. gr.

2.93 cryst. frag.

5.75 v. fine cryst.

—
v. fine red glob.

—
irr. amorph. part.

3.80
cryst. frag.

4.45
cryst. frag.

4.36
v. fine cryst. agg.

4.49
v. fine cryst. gr.

—
fibrous agg.

2.29
irr. coarse lumps

4-5
min. round, gr.

4.30 min. round, gr.

4.35 min. round, gr.

4.25 fine comp. gr.

— round, gr.

2.70 hollow spherulites

— irr. splintery part.
2.60 fine, vermicular cryst.

4.06 fine green agg.

6.7
tabular cryst.

5.96
fine prism, gr.

5.10
fine cryst. agg.

2.4
crypt, agg.

3.83
round, gr.

—
spher. gr.

—
round, gr.

—
fine dendritic cryst.

2.31
min. fossil forms

—
cryst. frag.

3-27
spherulites and disks

—
irr. amorph. part.

2.36
irr. plates

2.5-2.7
round, irr. gr.

2.36
fine cryst. gr.

—
prisms, plates

5-*
min. cryst.

1.77
min. round, part.

4.30 fine comp. gr.

4.0 cryst. frag.

— gr. and stubby prisms

— fine cryst. gr.
9.40 min. flakes

— porous irr. agg.
2.89 platy frag.

— min. round, gr.

— round, gr.

5 n i

REFRACTIVE INDEX 4
»s c 1.50-1.56 [M*]
1.49 (w. bi.) [W]

« 1.570^7 1.614,0 1-575 [LBJ

fvalentinite,a 2.18,7 and 0 2.35 f

(senarmonite, 2.09 (isot.)

nu 2.65 (isot.) [M*]

1.64-1.66 [M*]

a 1.730,7 1.838,0 1.758 [LB]

a 1.636,7 1-648,0 1.637 [LB]

1.62-1.64 [M*]

1.94-1.98 (bi.) [M]

«s x*729 7s slightly > 1.74 [M*]

1.65-1.70 (for larger translucent gr.]

2.64 (bright red)-2.77 (deep red) <

[M*]

2.50-2.76 (for CdS(Se) part) (isot.)
2.35-2.48 (isot.) [M*]
2.39-2.40 (for CdS part) [M*]
1.84 (isot.) [M*]
eg tf 1.510, «s<r 1.645 [M*]
(opaque)
a 1.558, 71-565, 01.564 (all db

[LB,M*]
c 2.4 (cf. Prussian blue and chrome ye

[M*]

oesomp < 2.31, 7650m;* 2.49 [M]

nu 2.5 [M]

a. 1.575, 7 1.598,/S 1.597 [LB]

» var.; max. c i.74blue Cisot-)

1.94-2.0 (w. bi.) [M*]

€ 1.65-1.79 (dull violet), w 1.68-

(salmon) (s. bi.) [M*]
1.72-1.76 (isot.) [W]
n mostly 1.435, some I-4° 1^*1
g 1.605, ta 1.635 (pleo.) [APL]
<*s 1-7I> 7s 1-78 (w. pleo.) [M*]
1.582-1.586 [W]
(opaque) [M]
n var. c 1.62, (porous) [M*]

a. 1.520, 7 1.530, £ 1.523 [LB]
1.67 (w. bi.) [M*]

€Li 2.78, ttjw 3.01 [M]

(opaque)

011.655, 7 1-9^ £ 1.875 [LB]
c 1^65 [W]

a 1.67, 7 1.75, /S 1.72 (for violet) [M]
ait 2.51, 7W 2.71, to 2.61 [M]
j8s 1.54 (irr.; bi. and pleo.) [M*]
« 1.563, 7 1.604,0 1-599 M

jLoi-a.a8 (isot.} [M*]

arfV (n fi\« 1 nt— «1-