We have already applied the q-BWF functions in several occasions (link1, link2, and references therein) for Raman bands. Here we consider the q-BWFs applied to the deconvolution of ATR infrared spectra (Attenuated Total Reflectance) of the barite-group minerals. Let us note that the "reflectance techniques may be used for samples that are difficult to analyze by the conventional transmittance method" . The ATR spectra here analyzed are given by the RRUFF database . RRUFF database is useful for testing new approaches to the deconvolution of spectra by means of functions which are not included among the line shapes commonly available in curve fitting software (that is, Gaussian, Lorentzian, Voigt, pseudo-Voigt functions). As we will show in our final discussion, asymmetric functions are necessary to represent the ATR spectral bands: the asymmetric q-BWF functions are suitable for purpose. solution (Ba,Sr)SO4" . In Wikipedia, it is told that worldwide, baryte "is used as a weighting agent for drilling fluids in oil and gas exploration to suppress high formation pressures and prevent blowouts". Details are given by