Cr

Chromium is a chemical element which has the symbol Cr and atomic number 24. It is a steel-gray, lustrous, hard metal that takes a high polish and has a high melting point. It is also odourless, tasteless, and malleable.

TECHNICAL DATA
Symbol	Cr	Ionic radius(6-coordinate)/pm IV	55
Atomic number	24	Density (20°C)/gcm^-3	7.14
No. of naturally occurring isotopes	4	Melting point / °C	1900
Atomic weight	51.996	Boiling point / °C	2690
Electronic configuration	[Ar]3d⁵4s¹	ΔH_fus/kJmol^-1	21 (+/-2)
Ionization energy/kJmol ^-1	653	ΔH_vap/kJmol^-1	342 (+/-6)
II	1592	ΔH_{f(monoatomic gas)/}kJmol^-1	397 (+/-3)
III	2987	Electrical resistivity
Metal radius(12-coordinate)/pm	128	(20°C)/ μohm cm	13
Ionic radius(6-coordinate)/pm VI	44	Electronegativity χ	1.6
Ionic radius(6-coordinatc)/pm V	49

EVAPORATION TECHNIQUES
Temperature (^oC) @Vap. Pressure			Techniques				Remarks
10^-8 Torr	10^-6 Torr	10^-4 Torr	Electron Beam	Crucible	Coil	Boat	Remarks
837 Sublimes	977 Sublimes	1157 Sublimes	Good	Vitreous Graphite	Tungsten	Cr plated rod or strip	Films very adherent. High rates possible. Cr plated rods are ideal for depositing Cr.

Cr
Precision Alloys
Alloy		Din Symbol	Electrical Resistivity at 20°C	Conductivity	Density
			μΩ/Cm	S/W	g/cm3
NEXOHM?		NiCr20AlSi	132	0.76	8
NEX^TMNC6015		NiCr6015	111	0.90	8.2
NEX^TMNC8020		NiCr8020	108	0.93	8.3
NEX^TMNC3020		NiCr3020	104	0.96	7.9
NEX^TMCC0.3		CuCr0.3	1.92	-	8.9

Thermo-electric Alloys
Model No.	Symbol	Melting Point	Temp Tolerance	Temp Range
		°C	°C
KP	Ni, Si, Fe,Cr	1430	±2.2°C or ±0.75% (t90)	0 to 1260
NP	Ni, Si, Cr	1394	±2.2°C or ±0.75% (t90)	0 to 1260
EP	Ni, Si, Fe,Cr	1430	±1.7°C or ±0.5% (t90)	0 to 870
KPX	Ni, Si, Fe,Cr	1430	±2.2°C	0 to 200
NPX	Ni, Si, Cr	1394	±2.2°C	0 to 200
EPX	Ni, Si, Fe, Cr	1430	±1.7°C	0 to 200

Sputtering Targets
Matierial	Symbol	Atomic Number	Thermal Conductivity	Theoretical Density
			W/m.K	g/cc
Chromium_Cr	Cr	24	94	7.2

Evaporation Materials
Matierial	Symbol	Atomic Number	Thermal Conductivity	Theoretical Density
			W/m.K	g/cc
Cr ( pieces )	Cr	24	94	7.2

Below is the periodic table of chemical elements.The elements in red are the ones Nexteck's product contain. Click them, you will come to the details.

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