Webmineral's Chemical Compostion Database contains
quantitative data on the chemical make-up of every mineral.
This data is derived from the chemical or empirical formulae by back-calculation
of published values.
The Search Engine reads reads the a database table
containing mineral name, element, and percent.
Element name is the chemical symbol for the
element. Example: Au for gold, W for tunsten, Na for sodium. The weight
percent is the mineral percent. Oxide percent's do not work. Here is a
handy Excel file
containing all the conversion factors for changing Oxide percent to
weight percent and vice versa.
The % tolerance number fuzzes
the weight percent data up and down by the tolerance value. For example, if
you choose "Ca" as the element, 22.2% as the weight percent, and
8% as the % tolerance, all values
between 19.98% and 24.42% Calcium are selected.
One, two or three elements can be selected to
limit possible minerals in the your analyses. Please note: The same %
tolerance number is applied to each element.
Mineral Element Composition Search - To Reset - Click Here
