PHYSICAL PROPERTIES OF PIGMENTS

PIGMENT NAME AND
CHEMICAL COMPOSITION 1
Aluminum hydrate, A1(OH)3
Aluminum stearate, Al(CisH3502)3
Anhydrite, CaS04

Antimony oxide, Sb203

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

(blanc fixe, art.), BaS04
Barium yellow, BaCr04
Blue verditer, 2CuC03-Cu(OH)2
Bone black, C + 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),

SPECIFIC
GRAVITY2

PARTICLE
CHARACTERISTICS 8

Chrome green (med.), Fe4[Fe(CN)6]

-f- PbCr04

Chrome red, PbCr04-Pb(OH)2
Chrome yellow (med.), PbCr04
Chromium oxide green, opaque,
Chrysocolla, CuSi03-»H20
Cobalt blue, CoO-Al2Os
Cobalt green, CoO-»ZnO
Cobalt violet, Co3(P04)2

Cobalt yellow, CoK3(N02)6-H20

Diatomaceous earth, SiO2

Egyptian blue, CaO-CuO-4Si02

Emerald green, Cu(C2Hs02)r 3Cu(As02)a

Gamboge, organic resin

Graphite, C

Green earth (celadonite and glauconite),

Fe, Mg, Al, K, hydrosilicate
Gypsum, CaS04-2H20
Indian yellow, Ci9Hi6OiiMg- 5H20
Iron oxide red (haematite), Fe2O3
Lamp black, C
Lithopone (regular), ZnS (28-30%), BaS04

(72-70%)

Malachite, CuC03-Cu(OH)2
Manganese blue, BaMn04 -f- BaS04
Manganese violet, (NH4)2Mn2(P207)2
Massicot (litharge), PbO
Mayan blue, Fe, Mg, Ca, Al, silicate (?)
Mica (muscovite), H2KAl3(Si04)3
Molybdate orange, Pb(Mo, S, Cr, P)04
Naples yellow, Pbs(Sb04)a
Ochre, yellow (eoethiteX FeaOa-HoO. clav.

2.45 v. fine amorph. part.

0.99 agg. of spher. gr.

2.93 cryst, frag.

5.75 v. fine cryst.

— v. fine red glob.

— irr. amorph. part.
3.80 cryst. frag.

4-45 Cr7st- 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.
2.6o fine, vermicular cryst.

4.06 fine green agg.

6.7

5.96

5.10

2.4

3.83

tabular cryst.
fine prism, gr.
fine cryst, agg.
crypt, agg.
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
5.2 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.

REFRACTIVE INDEX*
n^c 1.50-1.56 [M*j
1.49 (w. bi.) [W)
a 1.570, 7 1.614,18 1.575 [LB]
f valentinite, a 2. 1 8, 7 and jS 2.35 ._.
\senarmonite, 2.09 (isot.)
nu 2.65 (isot.) [M*j
1.64-1.66 [M*J

« 1.730, 7 1.838,18 1.758 [LB]
a 1.636,7 1.648,0 1.637 [LB]
1.62-1.64 [M*l
1.94-1.98 (bi.) [M]
<*s *-723 TS 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*j
2.39-2.40 (for CdS part) [M*]
1.84 (isot.) [M*]
e^Cl. 5 10,0)2^1.645^*]
(opaque)
ct 1.558, 71-565, £1.564 (all ±

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

a 2.42, 7 2.7 +,0 2.7 [M*]
ae2(taM < 2.31, Yesta/i 2.49 [M]
njA 2.5 [M]

« *-S7S* v I-59M r-597 M

n var.; max. c i-74biue Osot.) [M]

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

6 1.65-1.79 (dull violet), w 1.68-

(salmon) (s. bi.) [M*]
1.72-1.76 (isot.) [W]
n mostly 1.435, some 1.40 [M*j
e 1.605, w I>635 (pleo.) [APL]
<*s ^T1? 7s 1-78 (w. pleo.) [M*]
1.582-1.586 [W]
(opaque) [M]
n var. c 1.62, (porous) [M*]

a. 1.520, 7 1.530,3 1.523 [LB]
1.67 (w. bi.) [M*J
cw 2.78, WL< 3.01 [M]
(opaque)
2.3(ZnSH.64(BaS04)[M]

a 1.655, 7 1.909.0 1-875 [LB]

c 1.65 [W]

a 1.67, y 1.75, p 1.72 (for violet) [M]

an *.5i> Yx*' 2.71, fai 2.61 [M]

fa 1.54 (irr.; bi. and pleo.) [M*]

a 1.563, 7 1.604, 3 1.599 U-B]

2.oi~2>a8 (isot.} [M*]

ficnr. na