Temperature Calibration

Selection of substances for temperature calibration
(courtesy by Dr. M. Emrich)

Material Phase transition/Melting Point Temperature/°C
-------------------------------------------------------------
NH₄NO₃ orth. → tetr.; humid 84.2 → kub.; humid, dry 125.2
TlNO₃ orth. → trig. 79 → kub. 143
KNO₃ orth. → trig. 128
CsNO₃ trig. → kub. 160
RbNO₃ trig. → kub. 164 kub. → tetr. 219
AgNO₃ orth. → trig. 165
Sn 231.927
KClO₄ orth. → kub. 295.7
Pb 327.5
KNO₃ 333.6
Zn 419.527
Ag₂SO₄ orth. → hex. 427
CuCl 430.0
Quartz trig. → hex. (a → β) 573.0
Sb 630.5
Al 660.2
KCl 776
NaCl 804 ± 3
Bi₂O₃ 820
Ag 962.0
NaF 988.0
Au 1064.18
K₂SO₄ 1069
Cu 1084.62
CaF₂ 1360
Ca₂SiO₄ a → a' 1425 ± 10
Ni 1453
Co 1495
Fe 1535
Ti 1675
Zr 1852
Cr 1890
Rh 1966
BN : expansion coefficient in c- direction for T = 20 ... 900°C : c = 6.6516 + 2.74 * 10-4 * T

Literature :

1. Klug, H.P., Alexander, L.E.: X-Ray Diffraction Procedures, Second Edition, Wiley Intersc. (1973)
2. McLaren, A.C.: Rev. Pure Appl.Chem. 12 (1962) 55-71
3. Pistorius, C.W.F.: Journ. of Chem. Phys. 46 (1967)6 2167-2172
4. Tomaszewski, P.E.: Structural Phase Transitions in Crystals, I. Database, Phase Transitions 38 (1992)3 127-221