| References: | Meddelelser om Grønland (1900): 24: 49; Petersen Ole V.,Secher K.(1985) - Gronland: Mineralien, Geologie, Geschichte. - Verlag Bode & Partner K.G., Bochum, 87 pagg; 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: 286, 292; American Mineralogist (1975): 60: 280; Mineralogical Record: 2: 18; Mineralogical Record: 5: 119. |