Physical, Chemical and Thermodynamic Properties of Pure Elements
Element System: Be
Name: Beryllium
Property Entry Summary
Element system
Be
Element name
Beryllium
Atomic number
4
Physical properties, Atomic and ionic radii, Electronegativity,
Physical and chemical properties
Ionization energy
Crystallographic data
Pearson symb ol, Space group, Prototype, Lattice Parameters,
Heat capacity, Enthalpy, Entropy, Gib b s free energy,
Thermo-Chemical property tables
Equilib rium constant
Thermo-Chemical property curves
Heat capacity, Enthalpy, Entropy, Gib b s free energy
Physical and Chemical Properties
Physical properties a
Atomic
Electronic
number
configuration
4
[He]2s2
Thermal
Electrical
conductivity resistivity
Density
Melting
Boiling
-3
point /℃
point /℃
/ W∙(m∙K)‾¹
at 25℃
/μΩ∙cm
at 20℃
1280
2477
200
3.56
/ g∙cm
1.85
Atomic and ionic radii a
Element
Be
Remark
Effective ionic radii / pm
Atom radius
/ pm
Ion charge
111.3
12+
Coordinator number
4
6
8
12
195
27
\
45
\
\
\
\
HS and LS are high spin and low spin state respectively.
Physical, Chemical and Thermodynamic Properties of Pure Elements
Electronegativity b
Electronegativity
I
Element
Be
II
a
b
1.5
1.5
1.47
I is calculated through the Bond energy, a and b are the calculated values of
Pauling and BauaHOB respectively.
Remark
Z*
*
+ 0.744 , Z is the
r
effective nuclear charge number of atom, r is the covalent radius, and χ is
II is the calculated value through the equation χ = 0.359
Electronegativity.
Ionization energy a
Atomic
number
Element
4
Be
Spectrum(in MJ∙ mol‾¹)
I
II
III
IV
V
VI
0.899
1.757
14.849
21.007
\
\
Reference：a. James G. Speight. Lange’s Handbook of Chemistry [M], McGRaw-Hill, 2005.
b．Q. C. Gu, S. C. Lou, Q. P. Dai, et al. Chemical Tables [M], Jingsu Scientific
and Technical Publishers, 1977.
Crystallographic data
Tempera
Element
-ture
Pressure*
Pearson
symbol
Space
group
℃
Be
25
atm
hP2
P63/mmc
Be(HT)
>1270
atm
CI2
Im3 m

Lattice
Comment
Proto Parameters
c/a , or 
-type
nm
or 
(a, b, c)
Mg
a=0.22826
c=0.35836
0°
W
a=0.25515
---
a=0.2168
Be(hp)
Remark
25
>28.3
oP4
P2,2,2
Be
*Pressures other than atmosphere are given in GPa.
b=0.3755
c=0.3416
---
Physical, Chemical and Thermodynamic Properties of Pure Elements
Reference：P. Villars, A. Prince, H. Okamoto. Handbook of Ternary alloy Phase Diagrams
[M], ASM: Materials Park, Ohio, 1995.
Thermo-Chemical property tables
Phase
T
CP
[K]
S
-(G-H298)/T
H-H298
[J/(K*mol)]
ΔHf
ΔGf
logK f
[KJ/mol]
[-]
SOL
0
0
0
INFINITE
-1.932
0
0
0
(alpha)
100
1.819
0.503
19.434
-1.893
0
0
0
200
9.984
4.174
10.751
-1.315
0
0
0
298.15
16.380
9.440
9.440
0
0
0
0
300
16.472
9.542
9.440
0.030
0
0
0
400
19.965
14.817
10.136
1.872
0
0
0
500
21.943
19.501
11.551
3.975
0
0
0
600
23.336
23.630
13.227
6.242
0
0
0
700
24.463
27.314
14.981
8.634
0
0
0
800
25.458
30.647
16.734
11.130
0
0
0
900
26.384
33.699
18.452
13.723
0
0
0
1000
27.274
36.525
20.119
16.406
0
0
0
1100
28.147
39.166
21.732
19.177
0
0
0
1200
29.016
41.652
23.290
22.035
0
0
0
1300
29.886
44.009
24.793
24.980
0
0
0
1400
30.763
46.256
26.247
28.013
0
0
0
1500
31.650
48.409
27.653
31.133
0
0
0
1527.000
31.892
48.975
28.025
31.991
alpha--- beta
1527.000
1560.000
30.000
30.000
53.461
54.102
28.025
28.570
38.840
39.830
TRANSITION
1560.000
1600
28.788
28.874
59.163
59.893
28.570
29.344
47.725
48.879
0
0
0
1700
29.089
61.650
31.193
51.777
0
0
0
1800
29.304
63.319
32.932
54.696
0
0
0
1900
29.519
64.909
34.573
57.638
0
0
0
2000
29.734
66.429
36.128
60.600
0
0
0
2100
29.949
67.884
37.606
63.584
0
0
0
2200
30.164
69.283
39.014
66.590
0
0
0
2300
30.379
70.628
40.360
69.617
0
0
0
2400
30.594
71.926
41.648
72.666
0
0
0
2500
30.809
73.179
42.885
75.736
0
0
0
2600
31.024
74.391
44.073
78.828
0
0
0
SOL
(beta)
Liquid
beta--- Liquid
TRANSITION
Physical, Chemical and Thermodynamic Properties of Pure Elements
Phase
T
CP
[K]
Liquid
Gas
2700
S
-(G-H298)/T
H-H298
[J/(K*mol)]
ΔHf
ΔGf
[KJ/mol]
logK f
[-]
31.239
75.566
45.218
81.941
0
0
0
2741.437
31.328
76.043
45.680
83.237
0
0
0
298.15
300
20.786
20.786
136.274
136.403
136.274
136.275
0
0.038
324.000 286.184
324.008 285.950
-50.138
-49.788
350
20.786
139.607
136.528
1.078
324.169 279.592
-41.727
400
20.786
142.383
137.090
2.117
324.245 273.218
-35.679
450
20.786
144.831
137.817
3.156
324.257 266.839
-30.974
500
20.786
147.021
138.630
4.196
324.221 260.460
-27.210
600
20.786
150.811
140.354
6.274
324.032 247.724
-21.566
700
20.786
154.015
142.082
8.353
323.719 235.029
-17.538
800
20.786
156.791
143.751
10.431
323.301 222.386
-14.520
900
20.786
159.239
145.339
12.510
322.787 209.802
-12.177
1000
20.786
161.429
146.840
14.589
322.183 197.279
-10.305
1100
20.786
163.410
148.258
16.667
321.490 184.822
-8.776
1200
20.786
165.219
149.597
18.746
320.711 172.431
-7.506
1300
20.786
166.882
150.863
20.824
319.844 160.109
-6.433
1400
20.786
168.423
152.063
22.903
318.890 147.857
-5.517
1500
20.786
169.857
153.202
24.982
317.848 135.676
-4.725
1600
20.786
171.198
154.286
27.060
302.182 124.093
-4.051
1700
20.786
172.458
155.318
29.139
301.362 112.988
-3.472
1800
20.787
173.647
156.303
31.218
300.521 101.931
-2.958
1900
20.787
174.770
157.246
33.296
299.659 90.922
-2.500
2000
20.789
175.837
158.149
35.375
298.775 79.958
-2.088
2100
20.791
176.851
159.016
37.454
297.870 69.040
-1.717
2200
20.795
177.818
159.849
39.533
296.943 58.165
-1.381
2300
20.801
178.743
160.650
41.613
295.996 47.332
-1.075
2400
20.811
179.628
161.423
43.694
295.028 36.541
-0.795
2500
20.824
180.478
162.168
45.775
294.039 25.791
-0.539
2600
20.844
181.295
162.888
47.859
293.031 15.081
-0.303
2700
20.870
182.082
163.584
49.944
292.003
-0.085
2741.437
20.883
182.400
163.867
50.809 ---------FUGACITY=1bar------
2800
20.905
182.842
164.259
52.033
0.000
0.000
0.000
2900
20.949
183.576
164.912
54.126
0.000
0.000
0.000
3000
21.006
184.287
165.546
56.223
0.000
0.000
0.000
4.410
Reference: Malcolm W. Chase, Jr. NIST-JANAF Thermochemical Tables 4 th Ed [M], National
Institute of Standards and Technology: Gaithersburg, Maryland.
Physical, Chemical and Thermodynamic Properties of Pure Elements
Thermo-Chemical Property Curves
Calculated Thermo-Chemical Property Curves
Element
Figure
Be
Reference:
Title
Parameters
1
Heat capacities of phases of Be
2
Enthalpies of phases of Be relative to
HCP_A3
3
Entropies of phases of Be relative to
HCP_A3
4
Gibbs energies of phases of Be relative to
HCP_A3
[1]
A. T. Dinsdale. SGTE
1991,15(4):317-425.
data
for
pure
Temperature range:
300-2000K
elements[J].
Calphad,
[2] B. Sundman, B. Jansson, J. O. Andersson. The Thermo–Calc databank
system [J]. Calphad, 1985, 9(2): 153-190.
Physical, Chemical and Thermodynamic Properties of Pure Elements
Physical, Chemical and Thermodynamic Properties of Pure Elements