****
*                	List of elemental densities. 
*
*       Densities are given at normal temperature and pressure +/-
*       a few degrees C for solids and liquids, and standard temperature
*       and pressure for gases.   A value of zero implies that the 
*       density depends on the structure of the solid and so no nominal
*       density is applicable.
*
*           Element             Nominal density in gm/cm**3
*
****
    1 H    Hydrogen                  .00008988
    2 He   Helium                    .0001785
    3 Li   Lithium                   .534
    4 Be   Beryllium                1.848
    5 B    Boron                    2.37
    6 C    Carbon                   0.00
    7 N    Nitrogen                  .0012506
    8 O    Oxygen                    .001429
    9 F    Flourine                  .001696
   10 Ne   Neon                      .00089990
   11 Na   Sodium                    .971
   12 Mg   Magnesium                1.738
   13 Al   Aluminum                 2.6989
   14 Si   Silicon                  2.33
   15 P    Phosphorus               0.00
   16 S    Sulfur                   0.00
   17 Cl   Chlorine                  .003214
   18 Ar   Argon                     .0017837
   18 Ar   Argon (liquid)           1.578
   19 K    Potassium                .862
   20 Ca   Calcium                 1.55
   21 Sc   Scandium                2.989
   22 Ti   Titanium                4.54
   23 V    Vanadium                6.11
   24 Cr   Chromium                7.19
   25 Mn   Manganese               0.00
   26 Fe   Iron                    7.874
   27 Co   Cobalt                  8.9
   28 Ni   Nickel                  8.92
   29 Cu   Copper                  8.96
   30 Zn   Zinc                    7.133
   31 Ga   Gallium                 5.904
   32 Ge   Germanium               5.323
   33 As   Arsenic                 0.00
   34 Se   Selenium                0.00
   35 Br   Bromine                 3.12
   36 Kr   Krypton                  .003733
   37 Rb   Rubidium                1.532
   38 Sr   Strontium               2.54
   39 Y    Yttrium                 4.469
   40 Zr   Zirconium               6.506
   41 Nb   Niobium                 8.57
   42 Mo   Molybdenum             10.22
   43 Tc   Technetium             11.50
   44 Ru   Ruthenium              12.41
   45 Rh   Rhodium                12.41
   46 Pd   Palladium              12.02
   47 Ag   Silver                 10.50
   48 Cd   Cadmium                 8.65
   49 In   Indium                  7.31
   50 Sn   Tin                     0.00
   51 Sb   Antimony                6.691
   52 Te   Tellurium               6.24
   53 I    Iodine                  4.93
   54 Xe   Xenon                    .005887
   54 Xe   Xenon (liquid)          3.52
   55 Cs   Cesium                  1.873
   56 Ba   Barium                  3.5
   57 La   Lanthanum               6.145
   58 Ce   Cerium                  6.657
   59 Pr   Praseodymium            0.00
   60 Nd   Neodymium               0.00
   61 Pm   Promethium              7.22
   62 Sm   Samarium                0.00
   63 Eu   Europium                5.243
   64 Gd   Gadolinium              7.9004
   65 Tb   Terbium                 8.229
   66 Dy   Dysprosium              8.55
   67 Ho   Holmium                 8.795
   68 Er   Erbium                  9.066
   69 Tm   Thulium                 9.321
   70 Yb   Ytterbium               6.54
   71 Lu   Lutetium                9.840
   72 Hf   Hafnium                13.31
   73 Ta   Tantalum               16.654
   74 W    Tungsten               19.3
   75 Re   Rhenium                21.02
   76 Os   Osmium                 22.57
   77 Ir   Iridium                22.42
   78 Pt   Platinum               21.45
   79 Au   Gold                   19.3
   80 Hg   Mercury                13.546
   81 Tl   Thallium               11.85
   82 Pb   Lead                   11.35
   83 Bi   Bismuth                 9.747
   90 Th   Thorium                11.72
   92 U    Uranium                18.95
   98      Contrast Material       0.00
   99      Anti-scatter Grid       0.00
  101      Air                      .001225
  102      Breast Tissue           1.00
  103      Pyrex Glass             2.550
  104      Lucite                  1.174
  105      Tetramethyl Tin         1.314
  106      Mercuric Iodide         6.360
  107      Cadmium Telluride       6.20
  108      Lead Monoxide           8.00
  109      Sodium Iodide           3.667
  110      Cesium Iodide           4.51
  111      Bismuth Germanate       7.049
  112      Zinc Oxide              5.606
  113      Calcium Tungstate       6.062
  114      Barium Fluoride         1.986
  115      Calcium Fluoride        3.180
  116      Gadolinium Oxysulfide   7.340
  117      Lithium Fluoride        2.635 
  118      Cortical Bone 2.2       2.200

