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Lermontovite

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Mikhail Yur'evich Lermontov
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.


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Classification of LermontoviteHide

Approved, 'Grandfathered' (first described prior to 1959)
8.DN.15

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
19.11.1

19 : Phosphates
11 : Phosphates of U

Physical Properties of LermontoviteHide

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 LermontoviteHide

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.
Surface Relief:
High
Dispersion:
r > v weak
Pleochroism:
Visible
Comments:
In shades of green to grayish green

Chemical Properties of LermontoviteHide

Formula:
U(PO4)(OH) · H2O
IMA Formula:
U4+PO4(OH) · H2O

Crystallography of LermontoviteHide

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 LermontoviteHide

Other Language Names for LermontoviteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Marcasite2 photos of Lermontovite associated with Marcasite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.DN.05NatrophosphateNa7(PO4)2F · 19H2OIso. m3m (4/m 3 2/m) : Fd3c
8.DN.10IsoclasiteCa2(PO4)(OH) · 2H2OMon.
8.DN.15UrphoiteU4+6(PO4)7(OH)3 · 4H2OMon.
8.DN.20VyacheslaviteU(PO4)(OH) · nH2OOrth.

Related Minerals - Dana Grouping (8th Ed.)Hide

40.4.8.1NingyoiteCaU(PO4)2 · 1-2H2OOrth.
40.4.8.3VyacheslaviteU(PO4)(OH) · nH2OOrth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.11.2MetavanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 2H2OOrth. mmm (2/m 2/m 2/m) : Fddd
19.11.3VanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 4H2OOrth.
19.11.4Chernikovite(H3O)2(UO2)2(PO4)2 · 6H2OTet.
19.11.5VyacheslaviteU(PO4)(OH) · nH2OOrth.
19.11.6MetanatroautuniteNa(UO2)(PO4)(H2O)3Tet. 4/mmm (4/m 2/m 2/m) : P4/ncc
19.11.7YingjiangiteK2Ca(UO2)7(PO4)4(OH)6 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
19.11.8Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
19.11.9Uramphite(NH4)2(UO2)2(PO4)2 · 6H2OTet.
19.11.10TorberniteCu(UO2)2(PO4)2 · 12H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
19.11.11MetatorberniteCu(UO2)2(PO4)2 · 8H2OTet. 4/m : P4/n
19.11.12SaléeiteMg(UO2)2(PO4)2 · 10H2OMon. 2/m : P21/b
19.11.13NingyoiteCaU(PO4)2 · 1-2H2OOrth.
19.11.14Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2OTet. 4/mmm (4/m 2/m 2/m)
19.11.15AutuniteCa(UO2)2(PO4)2 · 11H2OOrth. mmm (2/m 2/m 2/m) : Pnma
19.11.16Pseudo-autunite(H3O)4Ca2(UO2)2(PO4)4 · 5H2OOrth.
19.11.17PhurcaliteCa2(UO2)3(PO4)2O2 · 7H2OOrth.
19.11.18Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
19.11.19UlrichiteCaCu(UO2)(PO4)2 · 4H2OMon.
19.11.20BergeniteCa2Ba4(UO2)9(PO4)6O6 · 16H2OMon. 2/m : P21/b
19.11.21Metauranocircite-IBa(UO2)2(PO4)2 · 7H2OMon. 2 : P21
19.11.22UranocirciteBa(UO2)2(PO4)2 · 10H2OTet.
19.11.23RanunculiteHAl(UO2)(PO4)(OH)3 · 4H2OMon.
19.11.24TrianguliteAl3(UO2)4(PO4)4(OH)5 · 5H2OTric.
19.11.25MunditeAl(UO2)3(PO4)2(OH)3 · 5.5H2OOrth.
19.11.26UpaliteAl(UO2)3(PO4)2O(OH) · 7H2OMon.
19.11.27FurongiteAl13(UO2)7(PO4)13(OH)14 · 58H2OTric. 1 : P1
19.11.28ThreadgolditeAl(UO2)2(PO4)2(OH) · 8H2OMon.
19.11.29PhuralumiteAl2(UO2)3(PO4)3(OH)2 · 13H2OMon.
19.11.30MoreauiteAl3(UO2)(PO4)3(OH)2 · 13H2O
19.11.31SabugaliteHAl(UO2)4(PO4)4 · 16H2OMon. 2/m : B2/m
19.11.32Uranospathite(Al,☐)(UO2)2(PO4)2F · 20(H2O,F)Orth. mm2 : Pnn2
19.11.33AlthupiteAlTh(UO2)7(PO4)4(OH)5O2 · 15H2OTric. 1 : P1
19.11.34Françoisite-(Nd)(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2OMon.
19.11.35Kivuite(Th,Ca,Pb)(UO2)4(HPO4)2(OH)8 · 7H2O
19.11.36ParsonsitePb2(UO2)(PO4)2Tric. 1 : P1
19.11.37DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2OOrth. mmm (2/m 2/m 2/m) : Cmma
19.11.38DumontitePb2(UO2)3(PO4)2(OH)4 · 3H2OMon. 2/m : P21/m
19.11.39PrzhevalskitePb2(UO2)3(PO4)2(OH)4 · 3H2OOrth.
19.11.40LehneriteMn2+(UO2)2(PO4)2 · 8H2OMon.
19.11.41BassetiteFe2+(UO2)2(PO4)2 · 10H2OMon. 2/m
19.11.42Vochtenite(Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2OMon.

Other InformationHide

Health Risks:
Radioactive

References for LermontoviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Getseva, R.V. and K.T. Salev’eva (1956): Handbook for the determination of uranium minerals, Moscow, 260 pp., esp. 199–200 (in Russian).
Soboleva, M.V. and I.A. Pudovkina (1957): Uranium Minerals Handbook. Moscow, 404 pp., esp. 181–182 (in Russian).
American Mineralogist (1958): 43: 379
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).
American Mineralogist (1984): 69: 214-215.

Internet Links for LermontoviteHide

Localities for LermontoviteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Germany
 
  • Bavaria
    • Upper Palatinate
      • Pleystein
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.
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Dzierżoniów District
      • Piława Górna (Ober Peilau; Gnadenfrei)
        • DSS Piława Górna Quarry
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
 
  • Northern Caucasus Region
    • Stavropol'skiy Kray
      • Pyatigorsk
        • Lermontovskoe U Deposit
          • Beshtau Mt.
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality  
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