Able, Aterial, Ensity and – INFICON RQCM - Quartz Crystal Microbalance Research System User Manual
Page 56: Coustic, Mpedance, Alue

RQCM – RESEARCH QUARTZ CRYSTAL MICROBALANCE
THEORY OF OPERATION
5-4
Table 5-1 Material Density and Acoustic Impedance Value
Material Symbol
Density
gm/cm^2
Impedance
10^5gm/(cm^2sec)
Aluminum Al
2.70
8.17
Aluminum Oxide
Al
2
O
3
3.97 26.28
Antimony Sb
6.62
11.49
Arsenic As
5.73
9.14
Barium Ba
3.5
4.20
Beryllium Be
1.85
16.26
Bismuth Bi
9.8
11.18
Boron B
2.54
22.70
Cadmium Cd
8.64
12.95
Cadmium Sulfide
CdS
4.83
8.66
Cadmium Telluride
CdTe
5.85
9.01
Calcium Ca
1.55
3.37
Calcium Fluoride
CaF
2
3.18 11.39
Carbon (Diamond)
C
3.52
40.14
Carbon (Graphite)
C
2.25
2.71
Chromium Cr
7.20
28.95
Cobalt Co
8.71
25.74
Copper Cu
8.93
20.21
Copper (I) Sulfide (alpha)
Cu
2
S 5.6 12.80
Copper (I) Sulfide (beta)
Cu
2
S 5.8 13.18
Copper (II) Sulfide
CuS
4.6
10.77
Dysprosium Dy
8.54
14.72
Erbium Er
9.05
11.93
Europium Eu
5.244
----
Gadolinium Gd
7.89
13.18
Gallium Ga
5.93
14.89
Gallium Arsenide
GaAs
5.31
5.55
Germanium Ge
5.35
17.11
Gold Au
19.30
23.18
Hafnium Hf
13.09
24.53
Holnium Ho
8.8
15.2
Indium In
7.30
10.50
Indium Antimonide
InSb
5.76
11.48
Iridium Ir
22.40
68.45
Iron Fe
7.86
25.30
Lanthanum La
6.17
9.59
Lead Pb
11.30
7.81
Lead Sulfide
PbS
7.50
15.60
Lithium Li
0.53
1.50
Lithium Fluoride
LiF
2.64
11.41
Magnesium Mg
1.74
5.48
Magnesium Fluoride
MgF
2
3.0 13.86
Magnesium Oxide
MgO
3.58
21.48
Manganese Mn
7.20
23.42
Manganese (II) Sulfide
MnS
3.99
9.39
Mercury Hg
13.46
11.93
Molybdenum Mo
10.20
34.36
Nickel Ni
8.91
26.68
Niobium Nb
8.57
17.91