25817-87-2 Usage
Chemical Properties
Different sources of media describe the Chemical Properties of 25817-87-2 differently. You can refer to the following data:
1. yellowish brown crystal(s); fcc, a=0.4518nm; most refractory of all known metal nitrides; hardness 1640kgf/mm2; electrical resistivity 33μohm· cm; can be prepared by heating Hf in N2 or NH3 atmospheric at 1000°C–1500°C; as a 99.5% pure material, used as a sputtering target to increase electrical stability of diodes, transistors, and integrated circuits [KIR80] [KIR81] [HAW93] [CER91]
2. Hafnium nitride is formed as yellow-brown, cubic crystals
and is prepared by heating hafnium metal to 1000–1500 C
in an atmosphere of nitrogen or ammonia. It can also be
prepared by reacting hafnium tetrachloride vapor with nitrogen
in a hydrogen atmosphere at temperatures higher than
1000 C.
Hafnium nitride is a brittle solid. The deposition of a thin
layer of hafnium nitride on steel grade, cemented carbide,
cutting tools reduces frictional forces and wear, thus increasing
the life of the tool by a factor of 6–8.
Check Digit Verification of cas no
The CAS Registry Mumber 25817-87-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,8,1 and 7 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 25817-87:
(7*2)+(6*5)+(5*8)+(4*1)+(3*7)+(2*8)+(1*7)=132
132 % 10 = 2
So 25817-87-2 is a valid CAS Registry Number.
InChI:InChI=1/Hf.N/rHfN/c1-2
