Lomonosovite
Na5Ti2(Si2O7)(PO4)O2 [CNMNC approved formula]
Named for Mikhail V. Lomonosov (1711-1765), Russian mineralogist and naturalist.
| IMA status : | Approved Species 1950 () |
| CLASSIFICATION | |
| Dana (8th edition) : |
56.04.01.01 |
| (56) Sorosilicate Si2O7 Groups and O, OH, F. and H2O | |
| (56.04) with [Si2O7] with phosphate, water | |
| (56.04.01) Lomonosovite group | |
| Nickel-Strunz (10th edition) : |
09.BE.32 |
| (09) Silicates | |
| (09.B) Sorosilicates (dimer) structures | |
| (09.BE) Si2O7 groups, with additional anions; cations in octahedral [6] and greater coordination | |
| Crystal system: | Triclinic System |
| Point group (H-M): | 1 — pinacoidal |