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Element

Melting Point

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Notes

Actinium

  1323 ± 50 K  

Aluminum

1 atm

 933.473 K 

ITS-90 fixed point (freezing point)

Americium

  1449 ± 5 K   

Antimony

1 atm

 903.778 K 

ITS-90 first-quality, secondary reference point (freezing point)

Argon

7.2 GPa

 810 K to 820 K 

5.7 GPa

 700 K to 750 K 

10.0 bar

  84.00 K  

5.0 bar

  83.87 K  

2.5 bar

  83.81 K  

1 bar

  83.814 K 

Arsenic

gray arsenic, 38.6 atm

 816 °C    

Astatine

 575.15 K  

Barium

1 bar

  1000 ± 3 K   

Berkelium

  1323 ± 50 K  

Beryllium

1 bar

  1560 ± 5 K   

Bismuth

1 atm

 544.552 K 

ITS-90 first-quality, secondary reference point (freezing point)

Boron

1 bar

  2350 ± 50 K  

Bromine

1 bar

265.90 ± 0.05 K

Cadmium

1 atm

 594.219 K 

ITS-90 first-quality, secondary reference point (freezing point)

Calcium

1 bar

  1115 ± 2 K   

Californium

  1173 ± 30 K  

Carbon

diamond, 125 kbar

  4100 ± 200 K 

graphite

1 kbar

  4800 ± 200 K 

100 atm

4200 K     

hexagonal graphite, 9 kbar

  4100 ± 100 K 

Cerium

  1070 ± 3 K   

Cesium

1 bar

301.55 ± 0.01 K

Chlorine

1 atm

 172.12 K  

Chromium

1 bar

  2130 ± 20 K  

Cobalt

1 atm

1768 K     

ITS-90 second-quality, secondary reference point (freezing point)

Copper

1 atm

1357.77 K  

ITS-90 fixed point (freezing point)

Curium

  1619 ± 50 K  

Dysprosium

  1683 ± 4 K   

Einsteinium

  1133 ± 50 K  

Erbium

  1795 ± 10 K  

Europium

  1095 ± 5 K   

Fermium

  1125 ± 50 K  

Flerovium

 340 K     

predicted value

Fluorine

1 atm

 53.49 ± 0.01 K

Francium

 300.15 K  

Gadolinium

  1591 ± 10 K  

Gallium

1 atm

 302.9146 K

ITS-90 fixed point (melting point)

Germanium

1211.40 K  

Gold

1 atm

1337.33 K  

ITS-90 fixed point (freezing point)

Hafnium

1 bar

  2500 ± 20 K  

Helium

26 atm

   0.95 K  

33.3 bar

   1.86 K  

Holmium

  1742 ± 5 K   

Hydrogen

146 GPa

   880 ± 50 K  

106 GPa

  1050 ± 60 K  

melting curve maximum

1 atm

  14.01 K  

1 bar

  13.95 K  

Indium

1 atm

 429.7485 K

ITS-90 fixed point (freezing point)

Iodine

1 bar

386.75 ± 0.03 K

Iridium

1 atm

2719 K     

ITS-90 first-quality, secondary reference point (freezing point)

Iron

1 atm

1811 K     

ITS-90 second-quality, secondary reference point (freezing point)

Krypton

1 atm

 115.78 K  

Lanthanum

  1192 ± 1 K   

Lawrencium

1900.15 K  

Lead

1 atm

 600.612 K 

ITS-90 first-quality, secondary reference point (freezing point)

Lithium

1 atm

 453.65 K  

Lutetium

  1950 ± 15 K  

Magnesium

1 bar

   923 ± 1 K   

Manganese

1 bar

  1519 ± 5 K   

Mendelevium

1100.15 K  

Mercury

1 atm

 234.3210 K

ITS-90 first-quality, secondary reference point (freezing point)

Molybdenum

1 atm

2895 K     

ITS-90 first-quality, secondary reference point (melting point)

Neodymium

  1298 ± 5 K   

Neon

54.5 kbar

 327.9 K   

52.8 kbar

 321.3 K   

46.6 kbar

 294.2 K   

46.4 kbar

 293.5 K   

45.4 kbar

 288.4 K   

41.8 kbar

 273.5 K   

41.3 kbar

 270.6 K   

25.9 kbar

 197.7 K   

21.8 kbar

 177.4 K   

15.7 kbar

 143.3 K   

1 bar

  25.24 K  

Neptunium

   913 ± 3 K   

Nickel

1 atm

1728 K     

ITS-90 second-quality, secondary reference point (freezing point)

Niobium

1 atm

2745 K     

ITS-90 second-quality, secondary reference point (melting point)

Nitrogen

71 GPa

1400 K     

50 GPa

1920 K     

19 GPa

   830 ± 40 K  

1 atm

  63.15 K  

Nobelium

1100.15 K  

Osmium

1 atm

  3400 ± 50 K  

Oxygen

molecular oxygen

10 bar

  54.47 K  

2.0 bar

  54.38 K  

1.5 bar

  54.38 K  

1 atm

  54.37 K  

1 bar

  54.37 K  

0.8 bar

  54.37 K  

0.6 bar

  54.37 K  

ozone, 1 atm

  80.15 K  

Palladium

1 atm

1828.0 K   

ITS-90 first-quality, secondary reference point (freezing point)

Phosphorus

cubic white phosphorus

  44.1 °C  

ultrapure

  44.25 °C 

Platinum

1 atm

2041.3 K   

ITS-90 first-quality, secondary reference point (freezing point)

Plutonium

   913 ± 2 K   

Polonium

 527.15 K  

Potassium

1 bar

 336.35 K  

Praseodymium

  1208 ± 3 K   

Promethium

  1253 ± 10 K  

Protactinium

  1843 ± 50 K  

Radium

 973.15 K  

Radon

1 atm

 202.15 K  

Rhenium

  3458 ± 20 K  

Rhodium

1 atm

2236 K     

ITS-90 first-quality, secondary reference point (freezing point)

Rubidium

1 bar

312.65 ± 0.1 K 

Ruthenium

1 atm

2606 K     

ITS-90 second-quality, secondary reference point (melting point)

Rutherfordium

2400 K     

Samarium

  1346 ± 5 K   

Scandium

1814.15 K  

Selenium

gray selenium

 493.65 K  

Silicon

1 atm

1414 °C    

1 bar

  1685 ± 3 K   

Silver

1 atm

1234.93 K  

ITS-90 fixed point (freezing point)

Sodium

1 atm

 370.944 K 

ITS-90 second-quality, secondary reference point (freezing point)

Strontium

1 bar

  1050 ± 10 K  

Sulfur

1 bar

388.36 ± 0.02 K

cyclo-hexasulfur

  88 °C    

cyclo-heptasulfur

  39 °C    

α-orthorhombic sulfur

 115 °C    

β-monoclinic sulfur

 120 °C    

γ-monoclinic sulfur

 109 °C    

cyclo-nonasulfur

  63 °C    

cyclo-decasulfur

  92 °C    

the compound S6·S10

  92 °C    

cyclo-undecasulfur

  74 °C    

cyclo-tetradecasulfur

 117 °C    

α–cyclo-octadecasulfur

126 °C to 128 °C

cyclo-eicosasulfur

 121 °C    

Tantalum

1 atm

3280 K     

Technetium

2430.15 K  

Tellurium

 722.66 K  

Terbium

  1624 ± 5 K   

Thallium

 577.15 K  

Thorium

  2020 ± 10 K  

Thulium

  1822 ± 10 K  

Tin

1 atm

 505.078 K 

ITS-90 fixed point (freezing point)

Titanium

1 atm

1943 K     

ITS-90 second-quality, secondary reference point (melting point)

Tungsten

1 atm

3687 K     

ITS-90 first-quality, secondary reference point (melting point)

Ununoctium

 258 K     

predicted value

Ununpentium

 700 K     

predicted value

Ununtrium

 700 K     

predicted value

Uranium

  1407 ± 2 K   

Vanadium

1 bar

  2190 ± 20 K  

Xenon

1 atm

 161.36 K  

Ytterbium

  1091 ± 10 K  

Yttrium

1795.15 K  

Zinc

1 atm

 692.677 K 

ITS-90 fixed point (freezing point)

Zirconium

1 atm

2127 K     

ITS-90 second-quality, secondary reference point (melting point)

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