Tl(BrI) KRS-5

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
Rupture 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 (TlBr_0,42I_0,48)) 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.

CaF2 – 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.