10.8 CIPW Norm Minerals

Norm Mineral Symbol Oxide Proportions GFW
Acmite (ac): (Na2O)(Fe2O3)(SiO2)4 461.998
Albite (ab): (Na2O)(Al2O3)(SiO2)6 524.438
Anorthite (an): (CaO)((Al2O3)(SiO2)2 278.204
Apatite (ap): (CaO)3.33(P2O5) 328.866
Calcium Orthosilicate (cs): (CaO)2(SiO2) 172.237
Corundum ( C): (Al2O3) 101.961
Diopside (di): (CaO)([Mg,Fe]O)(SiO2)2 (Mg#)*216.547 +
(1-Mg#)*248.087
Hematite (hm): (Fe2O3) 159.687
Hypersthene (hy): ([Mg,Fe]O)(SiO2) (Mg#)*100.387 +
(1-Mg#)*131.927
Ilmenite (il): (FeO)(TiO2) 151.709
Kaliophilite (kp): (K2O)(Al2O3)(SiO2)2 316.322
Leucite (le): (K2O)(Al2O3)(SiO2)4 404.272
Magnetite (mt): (FeO)(Fe2O3) 231.531
Nepheline (ne): (Na2O)(Al2O3)(SiO2)2 284.186
Olivine (ol): ([Mg,Fe]O)2(SiO2) (Mg#)*140.691 +
(1-Mg#)*203.771
Orthoclase (or): (K2O)(Al2O3)(SiO2)6 556.654
Perovskite (pf): (CaO)(TiO2) 135.942
Potassium Metasilicate (ks): (K2O)(SiO2) 154.278
Quartz ( Q): (SiO2) 60.083
Rutile (rt): (TiO2) 79.865
Sodium Metasilicate (ns): (Na2O)(SiO2) 122.062
Titanite (tn): (CaO)(TiO2)(SiO2) 196.025
Wollastonite (wo): (CaO)(SiO2) 116.160


For the GFW's, Mg# is a molar ratio, MgO/(MgO+FeO), calculated using the FeO remaining (Feo*) after TiO2, Na2O, and Fe2O3 have been used up in the CIPW norm calculation (in step 8).

not used in the examples or the Norm Calculation tool.