KRS-5

(

Tl(BrI)

)
Eigenschaften 
Transmission Range

0.57 - 40 µm (thickness 5.5/ 5 mm)

Refractive Index

2.57288 @633nm

Reflection Loss 

16.53% @10 µm

Residual Beam Wavelength  

170 µm (max. Reflection)

Density  

7.365 g/cm3

Melting point  

414.5°C

Molecular Weight 

42 mol% TlBr, 58 mol% TlJ

Thermal Conductivity  

0.544 W/(m·K) @293K

Spec. Heat Capacity  

160 J/kg·K

Thermal Expansion  

58.0 · 10-6 /K @293...373K

Hardness (Mohs) 

40.2 <100> (Indenter load: 200g)  

Young's Modulus 

15.85 GPa

Shear Modulus 

5.79 GPa

Bulk Modulus  

19.78 GPa

Fracture Modulus 

26.2 MPa

Elastic Coefficient 

C11 = 34.1; C12 = 13.6; C44 = 5.79 GPa

Dielectric Constant

32.5 @298K; f = 100 Hz...10 MHz

Solubility in Water 

0.05g /100g @20°C

Crystal Structure  

TlBr 42%; TlJ 58%

Crystal Type  

cubic, CsCl type structure, a= 4,11 Å  

Cleavage Planes 

none  

Poisson Ratio  

0.34

Application  

ATR Spectroscopy (Atenuated Total Reflection Plates), IR optics 

Remarks  

Attention: Thallium salts are toxic but because of the low water-solubility only little danger when handling with spectroscopy. KRS-5 is soluble in some organic barren (Ethylenglykol, Dimethylsulfoxide, 1,2-Propandiamin), complexing agents and strong basics. Max. temperature for application: 200°C, easy deformable (cold liquidity). 

Remarkable 
  • Conspicuous by its red-orange color
  • Frequently used as an ATR crystal and as a part of IR lens systems
  • A good transmission far into the FIR range (40 µm)
  • KRS-5 has to be handled with caution (thallium mixed crystal (TlBr0,42I0,48))
  • For the first time KRS-5 was manufactured in 1941 at Carl Zeiss in Jena
  • Maximum size of optics is 100 mm diameter
NOTE: Despite careful research, we do not accept any liability for the correctness of the information provided. Liability claims based on the use of the information are excluded in principle.

KRS-5: Korth Kristalle - Vom Rohkristall zur hochpräzisen Optik. Durchblick für alle Wellenlängen - Seit 72 Jahren züchten wir Kristalle und fertigen daraus hochpräzise optische Komponenten für alle Wellenlängen vom IR- bis zum VUV-Bereich. Unsere Produkte kommen in allen Bereichen zum Einsatz, in denen eine hochentwickelte, präzise technische Ausstattung unerlässlich ist – von der Analytik bis hin zur Medizin- und Raumfahrttechnik.

Contact/Inquiry

Korth Kristalle

Am Jägersberg 3
24161 Altenholz

+49 (0)431 - 36 90 50
+49 (0)431 - 36 90 525

info@korth.de


Contact

Remarkable

  • Conspicuous by its red-orange color
  • Frequently used as an ATR crystal and as a part of IR lens systems
  • A good transmission far into the FIR range (40 µm)
  • KRS-5 has to be handled with caution (thallium mixed crystal (TlBr0,42I0,48))
  • For the first time KRS-5 was manufactured in 1941 at Carl Zeiss in Jena
  • Maximum size of optics is 100 mm diameter