This data folder contains the following optical properties: 
loss function (real)
dielectric function (complex)
index of refraction (complex)
reflectance(real)
absorption (real)
f-sum rules (real)

For each of the above properties, there are two files, as listed below

property                file1                        file2
##########################################################################
loss function           elem.loss.dat                elem.loss_conv.dat
dielectric function     elem.epsilon.dat             elem.epsilon_conv.dat
index of refraction     elem.index.dat               elem.index_conv.dat
reflectance             elem.reflectance.dat         elem.reflectance_conv.dat
absorption              elem.absorption.dat          elem.absorption_conv.dat
f-sum rules             elem.sumrules.dat            elem.sumrules_conv.dat            

where elem is the element symbol.

The files that named with _conv contain calculated results using a convolution
with the occupied density of states as detailed in our paper 
"Full spectrum optical constant interface to the Materials Project", J. J. Kas et al., arXiv:2108.10981 [cond-mat.mtrl-sci] (2021)

The files withouth _conv in the name contain calculations that did not include the convolution.

##############################################################
Formatting of the files
#############################################################
The format of the files is as follows:

1. All files contain both a full calculation of the properties including fine-structure, as well as a calculation without
   fine structure, which we denote "atomic background".
 
2. For complex valued properties, the columns contain 

   Energy, Re[property], Im[property], Re[atomic background], Im[atomic background]

3. For real valued properties, the colunns contain
   
   Energy, property, atomic background


In addition to these data files, the input required to run the Corvus [opcons] workflow is also included. In particular,
there is a corvus input file named "elem.opcons.in" as well as a crytallographic
information file named "elem.CIF_symm.cif"
Once FEFF10 and Corvus are install correctly, you can run the code using the command:

run-corvus -i elem.opcons.in

To install FEFF10/Corvus for opcons, follow the instructions provided at: http://feff.phys.washington.edu/optical-constants/installation.html
