164 Table 117 



DENSITY OF VARIOUS NATURAL AND ARTIFICIAL MINERALS 



Name and formula 



Density in Sp. vol. 

 grams in cm 3 



per cm 3 per gram 



Reference 



Oxides C 



Corundum AI2O3 art ( o c ) 



Lime CaO art (25°) 



Magnesia MgO art (25°) 



Ferrous oxide FeO art (20°) 



Hematite Fe 2 Os (20 ) 



Magnetite Fe3C>4 ( 0°) 



Quartz Si0 2 nat (20 ) 



" art (25 ) 



Cristobalite Si0 2 art (25°) 



Vitreous silica ( 0°) 



Rutile Ti0 2 ( o°) 



Ilmenite (FeTihOs ( 0°) 



Silicates 



Sillimanite Ah03.SiC>2 (25°) 



Mullite 3Al 2 03.2Si0 2 art (25 ) 



Albite NaAlSisOs art (25°) 



Anorthite CaAhSiaOs art (25°) 



Nephelite NaAlSiChart (21 °) 



Labradorite Ab4sAns 2 (26°) 



Oligoclase Ab7sAn 22 (25°) 



Orthoclase KAlSisOs 15 (15°) 



" adularia (15°) 



Microcline (25°) 



Calcium Ortho silicates 



a - Ca 2 Si04 art (25°) 



6 - Ca 2 Si04 art (25 ) 



7 - Ca 2 SiC-4 art (25°) 



Calcium Metasilicates 



a - CaSiCh (<£ - Wollastonite) art (25°) 



- CaSi0 3 (Wollastonite) art (25°) 



Diopside CaSiOs.MgSi03 (28°) 



art (25°) 



Enstatite MgSiCh art (25°) 



(MgSi03)s S (FeSi03)i 2 (25°) 



Hypersthene (MgSiCbho (FeSiOsbo (29°) 



Forsterite Mg 2 Si04 (20 ) 



Fayalite Fe 2 Si04 art ( 1 5 °) 



Garnet — grossularite (31°) 



" almandite (31°) 



Jadeite (31°) 



Miscellaneous Substances 



Borax, Anhydrous, Na 2 B407 art 



CaCOs; aragonite ( 0°) 



CaCOs; calcite (20°) 



CaF 2 ; fluorite (10°) 



Diamond (25°) 



NaCl; rock salt (20°) 



Na 2 S04V; thenardite art (25 ) 



Na 2 S04lII art (25°) 



KC1 ; fine powder art (30°) 



Pyrite FeS 2 (25 ) 



Marcasite FeS 2 (25°) 



(1) Day and Allen, 1905. (2) Day and Shepherd. 1906. (3) Allen, Wright and Clement, 1906. (4) Allen 

 and White, 1909. (s) Larsen, 1909. (6) Bowen, 1912. (7) Johnston and Adams, 1911. (8) Merwin, 1911. 

 (9) Allen and Crenshaw, 1911. (10) Busz and Rusberg, 1913. (11) Madelung and Fuchs, 1921. (12) 

 Adams and Williamson, 1923. (13) Rinne, 1923. (14) Pauling and Hendricks, 1925. (15) Wyckoff and 

 Crittenden, 1925. (16) Greig (unpublished). (17) Aurousseau and Merwin, 1928. (18) Adams and Gibson, 

 1929. (19) Kracek and Gibson, 1929. (20) Bjeljankin, 1927. (21) DeFoe and Compton, 1925. (22) 

 Sosman, 1927. 



" X-ray diffraction data. 



b Calculated from density and composition of adularia. 



Smithsonian Tables 



