Lermontovite
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About Lermontovite
Formula:
U(PO4)(OH) · H2O
Colour:
Grayish green, green
Lustre:
Silky, Dull
Specific Gravity:
4.00 - 4.50
Crystal System:
Orthorhombic
Name:
For Mikhail Yur'evich Lermontov (1814-1841), Russian poet
This page provides mineralogical data about Lermontovite.
Classification of Lermontovite
Approved, 'Grandfathered' (first described prior to 1959)
7/D.43-20
8.DN.15
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
N : With only large cations
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
N : With only large cations
40.4.8.2
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
4 : (AB)5(XO4)2·xH2O
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
4 : (AB)5(XO4)2·xH2O
19.11.1
19 : Phosphates
11 : Phosphates of U
19 : Phosphates
11 : Phosphates of U
Physical Properties of Lermontovite
Silky, Dull
Transparency:
Transparent
Comment:
Silky on fractures
Colour:
Grayish green, green
Comment:
Grassy green in transmitted light
Tenacity:
Very brittle
Density:
4.00 - 4.50 g/cm3 (Measured) 4.08 g/cm3 (Calculated)
Optical Data of Lermontovite
Type:
Biaxial (-)
RI values:
nα = 1.686 - 1.690 nβ = 1.707 nγ = 1.724 - 1.726
2V:
Calculated: 88°
Max Birefringence:
δ = 0.038

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v weak
Pleochroism:
Visible
Comments:
In shades of green to grayish green
Chemical Properties of Lermontovite
Formula:
U(PO4)(OH) · H2O
IMA Formula:
U4+(PO4)(OH) · H2O
Elements listed:
Crystallography of Lermontovite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Ccca
Cell Parameters:
a = 9.74(1) Å, b = 19.00(1) Å, c = 10.10(1) Å
Ratio:
a:b:c = 0.513 : 1 : 0.532
Unit Cell V:
1,869.11 ų (Calculated from Unit Cell)
Z:
12
Morphology:
Fibrous, veinlets or botyroidal masses.
Type Occurrence of Lermontovite
Geological Setting of Type Material:
Uranium bearing veins in granitic porphry stock.
Other Language Names for Lermontovite
German:Lermontovit
Spanish:Lermontovita
Common Associates
Related Minerals - Nickel-Strunz Grouping
8.DN.05 | Natrophosphate | Na6+xHxF(PO4)2 · (19+x)H2O | Iso. m3m (4/m 3 2/m) : Fd3c |
8.DN.10 | Isoclasite | Ca2(PO4)(OH) · 2H2O | Mon. |
8.DN.15 | Urphoite | U4+6(PO4)7(OH)3 · 4H2O | Mon. |
8.DN.20 | Vyacheslavite | U(PO4)(OH) | Orth. mmm (2/m 2/m 2/m) : Cmca |
Related Minerals - Dana Grouping (8th Ed.)
40.4.8.1 | Ningyoite | (U,Ca,Ce)2(PO4)2 · 1-2H2O | Orth. |
40.4.8.3 | Vyacheslavite | U(PO4)(OH) | Orth. mmm (2/m 2/m 2/m) : Cmca |
Related Minerals - Hey's Chemical Index of Minerals Grouping
19.11.2 | Metavanmeersscheite | U6+(UO2)3(PO4)2(OH)6 · 2H2O | Orth. mmm (2/m 2/m 2/m) : Fddd |
19.11.3 | Vanmeersscheite | U6+(UO2)3(PO4)2(OH)6 · 4H2O | Orth. |
19.11.4 | Chernikovite | (H3O)2(UO2)2(PO4)2 · 6H2O | Tet. |
19.11.5 | Vyacheslavite | U(PO4)(OH) | Orth. mmm (2/m 2/m 2/m) : Cmca |
19.11.6 | Metanatroautunite | Na(UO2)(PO4)(H2O)3 | Tet. 4/mmm (4/m 2/m 2/m) : P4/ncc |
19.11.7 | Yingjiangite | K2Ca(UO2)7(PO4)4(OH)6 · 6H2O | Orth. mmm (2/m 2/m 2/m) : Cmcm |
19.11.8 | Meta-ankoleite | K2(UO2)2(PO4)2 · 6H2O | Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm |
19.11.9 | Uramphite | (NH4)2(UO2)2(PO4)2 · 6H2O | Tet. |
19.11.10 | Torbernite | Cu(UO2)2(PO4)2 · 12H2O | Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm |
19.11.11 | Metatorbernite | Cu(UO2)2(PO4)2 · 8H2O | Tet. 4/m : P4/n |
19.11.12 | Saléeite | Mg(UO2)2(PO4)2 · 10H2O | Mon. 2/m |
19.11.13 | Ningyoite | (U,Ca,Ce)2(PO4)2 · 1-2H2O | Orth. |
19.11.14 | Meta-autunite | Ca(UO2)2(PO4)2 · 6H2O | Tet. 4/mmm (4/m 2/m 2/m) |
19.11.15 | Autunite | Ca(UO2)2(PO4)2 · 10-12H2O | Orth. mmm (2/m 2/m 2/m) : Pnma |
19.11.16 | Pseudo-autunite | (H3O)4Ca2(UO2)2(PO4)4 · 5H2O | Orth. |
19.11.17 | Phurcalite | Ca2(UO2)3(PO4)2O2 · 7H2O | Orth. |
19.11.18 | Phosphuranylite | KCa(H3O)3(UO2)7(PO4)4O4 · 8H2O | Orth. mmm (2/m 2/m 2/m) : Cmcm |
19.11.19 | Ulrichite | CaCu(UO2)(PO4)2 · 4H2O | Mon. |
19.11.20 | Bergenite | Ca2Ba4(UO2)9(PO4)6O6 · 16H2O | Mon. 2/m : P21/b |
19.11.21 | Metauranocircite-I | Ba(UO2)2(PO4)2 · 7H2O | Mon. 2 : P21 |
19.11.22 | Uranocircite | Ba(UO2)2(PO4)2 · 10H2O | Tet. |
19.11.23 | Ranunculite | HAl(UO2)(PO4)(OH)3 · 4H2O | Mon. |
19.11.24 | Triangulite | Al3(UO2)4(PO4)4(OH)5 · 5H2O | Tric. |
19.11.25 | Mundite | Al(UO2)3(PO4)2(OH)3 · 5.5H2O | Orth. |
19.11.26 | Upalite | Al(UO2)3(PO4)2O(OH) · 7H2O | Mon. |
19.11.27 | Furongite | Al13(UO2)7(PO4)13(OH)14 · 58H2O | Tric. 1 : P1 |
19.11.28 | Threadgoldite | Al(UO2)2(PO4)2(OH) · 8H2O | Mon. |
19.11.29 | Phuralumite | Al2[(UO2)3(PO4)2O(OH)](OH)3(H2O)9 | Mon. 2/m |
19.11.30 | Moreauite | Al3(UO2)(PO4)3(OH)2 · 13H2O | Mon. 2/m : P21/b |
19.11.31 | Sabugalite | HAl(UO2)4(PO4)4 · 16H2O | Mon. 2/m : B2/m |
19.11.32 | Uranospathite | (Al,◻)(UO2)2(PO4)2F · 20(H2O,F) | Orth. mm2 : Pnn2 |
19.11.33 | Althupite | AlTh(UO2)7(PO4)4(OH)5O2 · 15H2O | Tric. 1 : P1 |
19.11.34 | Françoisite-(Nd) | (Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O | Mon. |
19.11.35 | Kivuite | Th(UO2)4(PO3OH)2(OH)8 · 7H2O | |
19.11.36 | Parsonsite | Pb2(UO2)(PO4)2 | Tric. 1 : P1 |
19.11.37 | Dewindtite | H2Pb3(UO2)2(PO4)4O4 · 12H2O | Orth. mmm (2/m 2/m 2/m) : Cmma |
19.11.38 | Dumontite | Pb2(UO2)3O2(PO4)2 · 5H2O | Mon. 2/m : P21/m |
19.11.39 | Przhevalskite | Pb2(UO2)3(PO4)2(OH)4 · 3H2O | Orth. |
19.11.40 | Lehnerite | Mn2+(UO2)2(PO4)2 · 8H2O | Mon. |
19.11.41 | Bassetite | Fe2+(UO2)2(PO4)2 · 10H2O | Mon. 2/m |
19.11.42 | Vochtenite | (Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2O | Mon. |
Other Information
Health Risks:
Radioactive
References for Lermontovite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Getseva, R.V., Salev’eva, K.T. (1956) Handbook for the determination of uranium minerals, Moscow, 260 pp., esp. 199–200. (in Russian)
Soboleva, M.V., Pudovkina, I.A. (1957) Uranium Minerals Handbook. Moscow, 404 pp., esp. 181–182. (in Russian)
Fleischer, M. (1958) New mineral names. American Mineralogist: 43: 378-387 (379).
Soboleva, M.V., Pudovkina, I.A. (1961) Lermontovite. in Minerals of Uranium: 209-212.
Melkov, V.G.; Belova, L.N.; Gorshkov, A.I.; Ivanova, O.A.; Sivtsov, A.V.; Boronikhin, V.A. (1983) New data on lermontovite. Mineralogicheskii Zhurnal: 5(1): 82-87. (in Russian)
Dunn, P.J., Grice, J.D., Fleischer, M., Pabst, A. (1984) New mineral names. American Mineralogist: 69: 210-215 (214-215).
Internet Links for Lermontovite
mindat.org URL:
https://www.mindat.org/min-2381.html
Please feel free to link to this page.
Please feel free to link to this page.
External Links:
Mineral Dealers:
Localities for Lermontovite
Locality List




All localities listed without proper references should be considered as questionable.
Germany | |
| DILL, H.G., MELCHER, F., GERDES, A. and WEBER, B. (2008): The origin and zoning of hypogene and supergene Fe-Mn-Mg-Sc-U-REE-Zn phosphate mineralization from the newly discovered Trutzhofmühle aplite (Hagendorf pegmatite province, Germany). Canadian Mineralogist 46, 1131-1157.; Dill, H. G., Melcher, F., Gerdes, A., & Weber, B. (2008). The origin and zoning of hypogene and supergene Fe–Mn–Mg–Sc–U–REE phosphate mineralization from the newly discovered Trutzhofmühle aplite, Hagendorf pegmatite province, Germany. The Canadian Mineralogist, 46(5), 1131-1157. |
Seeliger, E. & Strunz, H. (1965): Erzpetrographie der Uranmineralien von Wölsendorf. II. Brannerit, Lermontovit(?), Selen und Selenide, Ni- and Bi-Begleitmineralien etc. Neues Jahrbuch für Mineralogie, Abhandlungen 103, 163-178.; Dill, H. G., & Weber, B. (2010). Accessory minerals of fluorite and their implication regarding the environment of formation (Nabburg–Wölsendorf fluorite district, SE Germany), with special reference to fetid fluorite (“Stinkspat”). Ore Geology Reviews, 37(2), 65-86. | |
Poland | |
| Pieczka, A., Włodek, A., Gołębiowska, B., Szełęg, E., Szuszkiewicz, A., Ilnicki, S., Nejbert, K., Turniak, K. (2015): Phosphate-bearing pegmatites in the Góry Sowie Block and adjacent areas, Sudetes, SW Poland. 7th International Symposium on Granitic Pegmatites, PEG 2015 Książ, Poland. Abstracts: 77-78 |
Russia | |
| |
| Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow |
Gremuchka ore zone, Mine no. 1, Beshtau Mountain, Lermontovskoe U Deposit, Pyatigorsk, Stavropol Krai, Russia