| China | |
- Inner Mongolia Autonomous Region
- Baotou League (Baotou Prefecture)
- Bayan Obo Mining District
| Zhang Peishan, Yang Zhuming, Tao Kejie, and Yang Xueming (1996): "Mineralogy and Geology of Rare Earths in China", Science Press (Beijing), 226 pp. | | Switzerland | |
- Kriegalp Valley (Chriegalp Valley)
| Van der Burgt, A. & Cuchet, S. (2005): Neu: Gadolinit, Aeschynit und Synchisit vom Fleschsee, Binntal (Schweiz). Lapis 30 (4), 19-27, 50. (in German) | | USA | | |
| Hewett, Donnel Foster & Jewell Jeannette Glass (1953), Two uranium-bearing pegmatite bodies in San Bernardino County, California American Mineralogist: 38: 1044; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 72. |
|