USGS Reference Materials (Illite)

We can get spectra from the USGS library and with some work we can import them to R or any other chemometric software to work with them. In this case I search for "illite" ( a type of clay mineral) and I found these 12 samples to work in coming posts with them.

       

We can see the spectra samples overplotted:

The USGS Library give a lot of details about each sample, such as the origin, purity, particle size, ......, and even the picture of the sample:

Illite GDS4.2 Marblehead ASDNGb AREF