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Gerasimovskite

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Formula:
Mn2+(Ti,Nb)5O12 · 9H2O
Hardness:
2
Name:
Named in 1957 by Evgeny Ivanovich Semenov in honor of Vasilii Ivanovich Gerasimovsky.
This page provides mineralogical data about Gerasimovskite.


Classification of Gerasimovskite

Approved, 'Grandfathered' (first described prior to 1959)
First Published:
1958
4.FM.25

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
M : Hydroxides with H2O +- (OH); unclassified
8.7.8.3

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
7 : Miscellaneous
18.1.37

18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U

Physical Properties of Gerasimovskite

Hardness (Mohs):
2

Optical Data of Gerasimovskite

Type:
Biaxial (-)
RI values:
nα = 1.740 nβ = 1.810 nγ = 1.810
2V:
Measured: 18°
Max Birefringence:
δ = 0.070
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v moderate

Chemical Properties of Gerasimovskite

IMA Formula:
Mn2+(Ti,Nb)5O12 · 9H2O
Elements listed in formula:

Type Occurrence of Gerasimovskite

Relationship of Gerasimovskite to other Species

Series:
Forms a series with Manganbelyankinite (see here)
4.FM.15FranconiteNaNb2O5(OH) · 3H2O
4.FM.15HochelagaiteCaNb4O11 · 8H2O
4.FM.15TernoviteMgNb4O11 · 8-12H2O
4.FM.25BelyankiniteCa1-2(Ti,Zr,Nb)5O12 · 9H2O
4.FM.25ManganbelyankiniteMn2+(Ti,Nb)5O12 · 9H2O
4.FM.30SilhydriteSi3O6 · H2O
4.FM.35CuzticiteFe23+Te6+O6 · 3H2O
18.1.1LithiotantiteLiTa3O8
18.1.2LueshiteNaNbO3
18.1.3NatroniobiteNaNbO3
18.1.4FranconiteNaNb2O5(OH) · 3H2O
18.1.5NatrotantiteNa2Ta4O11
18.1.6IrtyshiteNa2Ta4O11
18.1.7Rankamaite(Na,K,Pb)(Ta,Nb,Al)4(O,OH)10
18.1.8Hydropyrochlore(H2O,◻)2Nb2(O,OH)6(H2O)
18.1.9CalciotantiteCaTa4O11
18.1.10RynersoniteCaTa2O6
18.1.11Microlite Group(Ca,Na)2Ta2(O,OH,F)7
18.1.12BelyankiniteCa1-2(Ti,Zr,Nb)5O12 · 9H2O
18.1.13LatrappiteCa2NbFe3+O6
18.1.14HochelagaiteCaNb4O11 · 8H2O
18.1.15Bariomicrolite (of Hogarth 1977)
18.1.16ParabariomicroliteBaTa4O10(OH)2 · 2H2O
18.1.17Bariopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
18.1.18AlumotantiteAlTaO4
18.1.19SimpsoniteAl4Ta3O13(OH)
18.1.20SosedkoiteK5Al2Ta22O60
18.1.21ThoreauliteSn2+Ta2O6
18.1.22Stannomicrolite (of Hogarth 1977)
18.1.23FoorditeSn2+Nb2O6
18.1.24ChangbaiitePbNb2O6
18.1.25Plumbopyrochlore (of Skorobogatova et al.)A2Nb2(O,OH)6Z
18.1.26Plumbomicrolite (of Hogarth 1977)
18.1.27StibiocolumbiteSbNbO4
18.1.28StibiotantaliteSb3+TaO4
18.1.29Natrobistantite
18.1.30CesplumtantiteCs2Pb3Ta8O24
18.1.31Stibiomicrolite (of Groat et al.)
18.1.32Cesstibtantite
18.1.34BismutotantaliteBiTaO4
18.1.35Bismutomicrolite (of Hogarth 1977)
18.1.36Tantalite-(Mn)Mn2+Ta2O6
18.1.38Tapiolite-(Mn)Mn2+Ta2O6
18.1.39Columbite-(Mn)Mn2+Nb2O6
18.1.40WodginiteMn2+Sn4+Ta2O8
18.1.41Ixiolite(Ta,Mn,Nb)O2
18.1.42Columbite-(Fe)Fe2+Nb2O6
18.1.43Tantalite-(Fe)Fe2+Ta2O6
18.1.44Columbite
18.1.45Tantalite(Mn,Fe)(Ta,Nb)2O6
18.1.46Tapiolite(Fe,Mn)(Ta,Nb)2O6
18.1.47Tapiolite-(Fe)Fe2+Ta2O6
18.1.48Columbite-(Mg)MgNb2O6
18.1.50Strüverite(Ti,Ta,Fe)O2
18.1.51 Staringite(Fe,Mn)x(Ta,Nb)2xSn6-3xO12

Other Names for Gerasimovskite

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Gerasimovskite

Reference List:
American Mineralogist: 43: 1220.

Internet Links for Gerasimovskite

mindat.org URL:
https://www.mindat.org/min-1678.html
Please feel free to link to this page.

Localities for Gerasimovskite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Greenland
 
  • Kujalleq
    • Narsaq
[Mineralogical Record - Vol 24 No 2]; Petersen, O.V. (2001): List of all minerals identified in the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin. 190, 25-33
Russia
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
www.koeln.netsurf.de/~w.steffens/khib.htm
          • Kukisvumchorr Mt
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
        • Lovozero Massif
Pekov, I.V. (2000): Lovozero Massif. Moscow, Ocean Pictures Ltd, 480 pp.
Arzamastsev, A., Yakovenchuk, V., Pakhomovsky, Y., & Ivanyuk, G. (2008). The Khibina and Lovozero alkaline massifs: Geology and unique mineralization. In Guidbook for 33rd International Geological Congress Excursion (No. 47, p. 58).
            • Second Eastern Stream
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Trud.Inst.min.geokh.cryst. redkikh elementov,(1957) 1, 41-59; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Pekov, I.V. (2000): Lovozero Massif. Moscow, Ocean Pictures Ltd, 480 pp.; Yakovenchuk, V. N., Ivanyuk, G. Y., Krivovichev, S. V., Pakhomovsky, Y. A., Selivanova, E. A., Korchak, J. A., ... & Zalkind, O. A. (2011). Eliseevite, Na1. 5Li [Ti2Si4O12. 5 (OH) 1.5]∙ 2H2O, a new microporous titanosilicate from the Lovozero alkaline massif (Kola Peninsula, Russia). American Mineralogist, 96(10), 1624-1629.
Mineral and/or Locality  
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