|
CESIUM
(Cs)
MATERIAL
OVERVIEW
Characteristics:
Liquid at slightly above room temperature; soft solid
below melting point. Highly reactive. Decomposes in
water, with evolution of hydrogen, which ignites
instantly. Also reacts violently with oxygen, the
halogens, sulfur, and phosphorus, with spontaneous
ignition and/or explosion. Mohs hardness 0.2. Cesium
has highest position in the electromotive series; it
also has the lowest melting point of any alkali metal,
and the lowest ionization potential of any element.
Soluble in acids and alcohol. Low toxicity.
Derivation:
By thermochemical reduction of CsCl with calcium, or
by electrolysis of fused cyanide. Its chief ore is
pollucite, found in Maine, S. Dakota, Manitoba, Elba,
S. Africa.
Hazard:
Dangerous fire and explosion risk. Ignites
spontaneously in moist air; may explode in contact
with sulfur or phosphorus. Reacts violently with
oxidizing materials. Causes burns on contact with
skin.
GENERAL
PROPERTIES
|
Symbol:
|
Cs
|
|
Atomic
Number:
|
55
|
|
Atomic
Weight:
|
132.9054
|
|
Density:
|
1.873
gm/cc
|
|
Melting
Point:
|
28.40
oC
|
|
Boiling
Point:
|
669.3
oC
|
|
Thermal
Conductivity:
|
0.359
W/cm/oK
@ 298.2 oK
|
|
Electrical
Resistivity:
|
20
microhm-cm @ 20 oC
|
|
Electronegativity:
|
0.7
Paulings
|
|
Specific
Heat:
|
0.057
Cal/g/oK
@ 25 oC
|
|
Heat
of Vaporization:
|
16.3
K-Cal/gm atom at 669.3 oC
|
|
Heat
of Fusion:
|
0.5
Cal/gm mole
|
TYPICAL
ANALYSES
Impurities
in ppm
|
Material
/ Purity:
|
3N
|
|
Al
|
<7
|
|
Mg
|
1
|
|
Ni
|
<7
|
|
V
|
<1
|
|
B
|
<7
|
|
Cu
|
<7
|
|
Si
|
<7
|
|
K
|
<1
|
|
Be
|
<1
|
|
Zr
|
<13
|
|
Sr
|
<1
|
|
Ti
|
<7
|
|
Fe
|
<7
|
|
Mn
|
<1
|
|
Pb
|
<7
|
|
Ba
|
<4
|
|
Ca
|
1
|
|
Cr
|
<7
|
|
Na
|
<7
|
|
Rb
|
<1
|
|
Ag
|
<1
|
|
Sn
|
<7
|
|
Co
|
<7
|
|
Mo
|
<7
|
Packaging
|
|
|
|
Pre-Scored Ampoule
|
Breakseal Ampoule
|
SPECIFICATIONS:
|
Pre-Scored:
|
Size
|
O.D.
|
Length
|
Glass Type
|
|
1
Gram
|
10.5
mm
|
50-52
mm
|
Pyrex
|
|
5
Gram
|
16.6
mm
|
70
mm
|
Pyrex
|
|
25
Gram
|
22.5
mm
|
115
mm
|
Pyrex
|
|
50
Gram
|
28.5
mm
|
160
mm
|
Pyrex
|
|
Breakseal:
|
1
Gram
|
10
mm
|
180
mm
|
Pyrex
|
|
5
Gram
|
13
mm
|
230
mm
|
Pyrex
|
CESIUM
POWDER, SHOT, PELLETS, & INGOT
|
Material
|
Purity
|
|
Cesium
Metal 1 gm Pre-Scored Ampoule
|
3N+
|
|
Cesium
Metal 1 gm Straight Breakseal Ampoule
|
3N+
|
|
Cesium
Metal 5 gm Pre-Scored Ampoule
|
3N+
|
|
Cesium
Metal 5 gm Straight Breakseal Ampoule
|
3N+
|
|
Cesium
Metal 25 gm Pre-Scored Ampoule
|
3N+
|
|
Cesium
Metal 25 gm Straight Breakseal Ampoule
|
3N+
|
|
Cesium
Metal 50 gm Pre-Scored Ampoule
|
3N+
|
|
Cesium
Metal 50 gm Straight Breakseal Ampoule
|
3N+
|
Cesium
metal is packaged in glass ampoules under argon.
CESIUM
COMPOUNDS
|
Material
|
Purity
|
|
Cesium
Acetate CsC2H3O2
-8 Mesh
|
3N
|
|
Cesium
Bromide CsBr
-60 Mesh
|
3N
|
|
Cesium
Bromoiodide CsIBr2
-8 Mesh
|
3N
|
|
Cesium
Carbonate Cs2CO3
-40 Mesh
|
3N
|
|
Cesium
Chloride CsCl
-60 Mesh
|
3N
|
|
Cesium
Chlorobromide CsBrCl2
-8 Mesh
|
3N
|
|
Cesium
Chloroiodide CsICl2
-8 Mesh
|
3N
|
|
Cesium
Chromate CsCrO4
-20 Mesh
|
3N
|
|
Cesium
Fluoride CsF
-60 Mesh
|
3N
|
|
Cesium
Iodate CsIO3
-60 Mesh
|
3N
|
|
Cesium
Iodide CsI -8
Mesh
|
3N
|
|
Cesium
Molybdate Cs2MoO4
-200 Mesh
|
3N
|
|
Cesium
Niobate CsNbO3
-200 Mesh
|
3N
|
|
Cesium
Nitrate CsNO3
-80 Mesh
|
3N
|
|
Cesium
Perchlorate CsClO4
-8 Mesh
|
2N
|
|
Cesium
Selenate Cs2SeO4
-80 Mesh
|
3N
|
|
Cesium
Selenite Cs2SeO3
-80 Mesh
|
3N
|
|
Cesium
Tantalate CsTaO3
-200 Mesh
|
3N
|
|
Cesium
Tellurate Cs2TeO4
-80 Mesh
|
3N
|
|
Cesium
Tellurite Cs2TeO3
-80 Mesh
|
3N
|
|
Cesium
Titanate Cs2TiO3
-200 Mesh
|
3N
|
|
Cesium
Tungstate Cs2WO4
-200 Mesh
|
3N
|
|
Cesium
Zirconate Cs2ZrO3
-200 Mesh
|
3N
|
Compounds
are packaged to order and sold by the gram or
kilogram.
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