Ningyoite 
(U,Ca,Ce)2(PO4)2 • 1-2H2O [CNMNC approved formula]
Named for Ningyo Pass, Japan, where the mine in which the mineral was first found is located.
| IMA status : | Approved Species 1959 () |
| CLASSIFICATION | |
| Dana (8th edition) : |
40.04.08.01 |
| (40) Hydrated Phosphates | |
| (40.04) where A+++ XO4 · x(H2O) | |
| (40.04.08) Ningyoite Group | |
| Nickel-Strunz (10th edition) : |
08.CJ.80 |
| (08) Phosphates, Arsenates, Vanadates | |
| (08.C) Phosphates without Additional Anions, with H2O | |
| (08.CJ) With only large cations | |
| Crystal system: | Orthorhombic System |
| Point group (H-M): | 222 — disphenoidal |
| Other Properties: | Radioactive. |
| Comments: | Radioactive |