TABLE 273.— COMPRESSIBILITY OF THE ELEMENTS 



285 



— AF/Fo = aP — bP 2 , where P is in bars (10 a dyne/cm 2 ) and Vo is the volume at 1 atm 

 and 30 C C (or room temp.). Pressure range, 1 — 12,000 bars unless otherwise noted, 

 a = /3 = initial compressibility. See also Table 271. 



30°C 



7S°C 



Element axlO 7 



Aluminum 13.65 



Arsenic 31.6 



Beryllium 7.95 



Bismuth 29.70 



Boron 5.58 



Cadmium (20°C) 22.5 



Carbon (diamond) (25°C) .... 1.8 



Carbon (graphite) (20°C) . . . 30 



Cerium (below 4000 bars) ... 46.49 



Chromium 5.25 



Cobalt 5.46 



Copper 7.29 



Germanium 14.35 



Gold 5.84 



Hafnium 9.15 



Iodine (20°C to 500 bars) .... 127 



Iridium 2.69 



Iron 5.949 



Lanthanum 35.78 



Magnesium 30.08 



Manganese 8.03 



Molybdenum 3.63 



Nickel 5.35 



Niobium 5.77 



Palladium 5.34 



Platinum 3.63 



Rhodium 3.64 



Ruthenium 3.48 



Silicon (20°C to 500 bars) .... 3.1 



Silver 10.02 



Tantalum 4.84 



Thallium 35.5 



Thorium 18.50 



Titanium 8.09 



Tungsten 3.20 



Vanadium 6.17 



Zinc 16.93 



Zirconium 11.15 



Steel (20°C) 6.42 



Manganin (20°C) 8.41 



Element Temp C C 



Phosphorus 30 



red 75 



Phosphorus 30 



black 75 



Mercury (liquid) 20 



Gallium (solid) 20 



(liquid) 30 



* — AV/Vo. 



bxlO 12 

 4.9 



2.2 

 22 



axlO 7 



13.98 



8.06 

 30.44 



bxlO 12 

 4.9 



2.3 

 31 



SMITHSONIAN PHYSICAL TABLES 



