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# magnesium diboride

• Formula: B2Mg
• Molecular weight: 45.927
• CAS Registry Number: 12007-25-9
• Other data available:
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## Solid Phase Heat Capacity (Shomate Equation)

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Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
Cp = heat capacity (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.

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Temperature (K) 298. - 2000. 13.41420 1.700841 3.034250 -0.799018 -0.244777 -26.90569 22.80960 -21.97990 Chase, 1998 Data last reviewed in March, 1965
Temperature
(K)
Cp
(cal/mol*K)

(cal/mol*K)
-(G° - H°298.15)/T
(cal/mol*K)
H° - H°298.15
(kcal/mol)
298.11.418.588.60-0.01
300.11.468.668.600.02
400.13.0012.199.071.25
500.13.9415.2010.002.60
600.14.6717.8111.094.03
700.15.3220.1212.225.53
800.15.9322.2013.347.09
900.16.5224.1114.438.71
1000.17.1125.8815.4910.40
1100.17.6927.5416.5112.14
1200.18.2729.1117.4913.93
1300.18.8530.5918.4515.79
1400.19.4332.0119.3617.70
1500.19.9933.3720.2519.67
1600.20.5334.6821.1121.70
1700.21.0635.9421.9523.78
1800.21.5737.1622.7625.91
1900.22.0538.3423.5528.09
2000.22.5039.4824.3230.32