|
Austria | |
|
| R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993) |
|
China | |
- Inner Mongolia Autonomous Region
- Baotou League (Baotou Prefecture)
- Bayan Obo Mining District
| USGS Bull. 2143, Table 1, Principal minerals of the Bayan Obo ore deposit . |
|
Morocco | |
|
| Journal of Petrology, Vol. 44, Number 5, 2003, pp. 937-965. |
|
Russia | |
- Prebaikalia (Pribaikal'e)
- Biraya and Bya Rivers confluence area (Chara Basin)
| Pavel M. Kartashov analytical data |
|
Spain | |
|
| A. M. I. Martins collection |
|
USA | |
|
| Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 118. |
|
| various added photos |