PerkinElmer Spectrum Two HATR User Manual page 10

10 . Spectrum Two HATR User's Guide
Table 2 Properties of crystal materials
−1
ATR range (cm ) 17 000–650
Refractive index at
−1
1000 cm
3
Density (g/cm )
Max. useful temp.
in air (°C)
Hardness
(Knoop #)
Cleaning agents acetone, water
Solvents that
attack material strong alkalis
Remarks
easily cracked
NOTE: The ATR crystal is bonded to the sample plate with an adhesive, we therefore
recommend that you do not leave the crystal in contact with solvents, particularly
chlorinated solvents, for long periods.
Please ensure that you have read the safety information starting on page 4 of this User's
Guide for your crystal type before continuing.
ZnSe Ge
5500–600
2.4 4.0
5.27 5.32
300 270
150 1150
toluene, water
acids, hot H SO
2
aqua regia
hard, hard and brittle,
high reflection
loss
KRS5
14 000–400
2.37
7.37
200
40.2
MEK
, complexing
4
agents
deforms under
pressure, toxic,
does not cleave
AMTIR-1
11 000–700
2.50
4.4
300
170
organic solvents
strong acids,
strong bases,
strong oxidizers
hard and brittle