References
- Lundegårdh , P. H. 1971 . Nyttosten i Sverige , 271 Stockholm : Almqvist & Wiksell .
- Sadanaga , R. , Marumo , F. and Takéuchi , Y. 1961 . The Crystal Structure of Harmotome. Ba2Al4Si12O32. 12H2O . Acta Crystallografica , 14 : 1153 – 1163 .