Described as a new mineral by William F. Foshag in 1924, but discredited as being the same species as lavendulan by C. Guillemin in 1957.
References for Freirinite
Reference List:
Goldsmith (1877) Proceedings of the Academy of Sciences Philadelphia: 192.
Foshag (1924) American Mineralogist: 9: 30.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 750, 920-921 (as Freirinite).