LIVE REPORT! Gold and Silver Deposits in Colorado Symposium 2017 - last updated 8 minutes ago. Click here to watch.
Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Rankamaite

This page is currently not sponsored. Click here to sponsor this page.
Rankamaite

Mumba, Masisi Mts, Nord-Kivu, Democratic Republic of Congo (Zaïre)
Rankamaite, etc.

Ognevka Ta Deposit, Kalba Range, Eastern Kazakhstan Province Kazakhstan
Rankamaite, etc.

Mumba cassiterite gravels, Mumba, Masisi Mts, Nord-Kivu, Democratic Republic of Congo (Zaïre)
Rankamaite

Mumba, Masisi Mts, Nord-Kivu, Democratic Republic of Congo (Zaïre)
Rankamaite, etc.

Ognevka Ta Deposit, Kalba Range, Eastern Kazakhstan Province Kazakhstan
Rankamaite, etc.

Mumba cassiterite gravels, Mumba, Masisi Mts, Nord-Kivu, Democratic Republic of Congo (Zaïre)
Rankamaite

Mumba, Masisi Mts, Nord-Kivu, Democratic Republic of Congo (Zaïre)
Rankamaite, etc.

Ognevka Ta Deposit, Kalba Range, Eastern Kazakhstan Province Kazakhstan
Professor Kalervo Rankama
Formula:
(Na,K)3(Ta,Nb,Al)11(O,OH)31
System:
Orthorhombic
Colour:
Creamy-white
Hardness:
3 - 4
Name:
Named after Professor Kalervo Rankama (1913–1995), Finnish geochemist, University of Helsinki, Helsinki, Finland.
This page provides mineralogical data about Rankamaite.


Classification of Rankamaite

IMA status:
Approved
Strunz 8th ed.:
4/D.27-40
Nickel-Strunz 10th (pending) ed.:
4.DM.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
M : With large (+- medium-sized) cations; unclassified
Dana 8th ed.:
8.7.6.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
7 : Miscellaneous
Hey's CIM Ref.:
18.1.7

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

Physical Properties of Rankamaite

Colour:
Creamy-white
Hardness (Mohs):
3 - 4

Optical Data of Rankamaite

Type:
Biaxial
Dispersion:
r < v extreme

Chemical Properties of Rankamaite

Formula:
(Na,K)3(Ta,Nb,Al)11(O,OH)31
IMA Formula:
(Na,K,Pb)(Ta,Nb,Al)4(O,OH)10
Elements listed in formula:
Al, H, K, Na, Nb, O, Pb, Ta - search for minerals with similar chemistry

Crystallography of Rankamaite

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Cmmm
Space Group Setting:
Cmmm
Cell Parameters:
a = 17.224(3) Å, b = 17.687(3) Å, c = 3.9361(7) Å
α = 90°, β = 90°, γ = 90°
Ratio:
a:b:c = 0.974 : 1 : 0.223
Unit Cell Volume:
V 1199.1 ų
Z:
2
Comment:
Atencio et al. (2011)

Type Occurrence of Rankamaite

Type Locality:
Mumba cassiterite gravels, Mumba, Masisi Mts, Nord-Kivu, Democratic Republic of Congo (Zaïre)

Relationship of Rankamaite to other Species

Related Minerals - Nickel-Strunz Grouping):
4.DM.05Sosedkoite(K,Na)5Al2(Ta,Nb)22O60
4.DM.15Cesplumtantite(Cs,Na)2(Pb,Sb3+)3Ta8O24
4.DM.20EyseliteFe3+Ge34+O7(OH)
4.DM.25KuranakhitePbMn4+Te6+O6
Related Minerals - Hey's Index Grouping:
18.1.1LithiotantiteLiTa3O8
18.1.2LueshiteNaNbO3
18.1.3NatroniobiteNaNbO3
18.1.4FranconiteNa(Nb2O5)(OH) · 3H2O
18.1.5NatrotantiteNa2Ta4O11
18.1.6IrtyshiteNa2(Ta,Nb)4O11
18.1.8Hydropyrochlore(H2O,□)2Nb2(O,OH)6(H2O)
18.1.9CalciotantiteCaTa4O11
18.1.10RynersoniteCaTa2O6
18.1.11Microlite Group
18.1.12BelyankiniteCa1-2(Ti,Nb)5O12 · 9H2O (?)
18.1.13LatrappiteCa2NbFe3+O6
18.1.14Hochelagaite(Ca,Na,Sr)(Nb,Ti,Si,Al)4O11 · 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
18.1.19SimpsoniteAl4(Ta,Nb)3O13(OH,F)
18.1.20Sosedkoite(K,Na)5Al2(Ta,Nb)22O60
18.1.21Thoreaulite(Sn2+,Pb)(Ta,Nb)2O6
18.1.22Stannomicrolite (of Hogarth 1977)
18.1.23FoorditeSn2+(Nb,Ta)2O6
18.1.24ChangbaiitePbNb2O6
18.1.25Plumbopyrochlore (of Skorobogatova et al.)A2Nb2(O,OH)6Z
18.1.26Plumbomicrolite (of Hogarth 1977)
18.1.27StibiocolumbiteSb(Nb,Ta)O4
18.1.28StibiotantaliteSb(Ta,Nb)O4
18.1.29Natrobistantite
18.1.30Cesplumtantite(Cs,Na)2(Pb,Sb3+)3Ta8O24
18.1.31Stibiomicrolite (of Groat et al.)
18.1.32Cesstibtantite
18.1.34BismutotantaliteBi(Ta,Nb)O4
18.1.35Bismutomicrolite (of Hogarth 1977)
18.1.36Tantalite-(Mn)MnTa2O6
18.1.37Gerasimovskite(Mn,Ca)(Nb,Ti)5O12 · 9H2O
18.1.38Tapiolite-(Mn)(Mn,Fe)(Ta,Nb)2O6
18.1.39Columbite-(Mn)(Mn,Fe)(Nb,Ta)2O6
18.1.40WodginiteMn2+Sn4+Ta2O8
18.1.41Ixiolite(Ta,Nb,Sn,Fe,Mn)4O8
18.1.42Columbite-(Fe)FeNb2O6
18.1.43Tantalite-(Fe)FeTa2O6
18.1.44Columbite
18.1.45Tantalite(Mn,Fe)(Ta,Nb)2O6
18.1.46Tapiolite(Fe,Mn)(Ta,Nb)2O6
18.1.47Tapiolite-(Fe)(Fe,Mn)(Ta,Nb)2O6
18.1.48Columbite-(Mg)(Mg,Fe,Mn)(Nb,Ta)2O6
18.1.50Strüverite(Ti,Ta,Fe)O2
18.1.51 Staringite(Fe,Mn)x(Ta,Nb)2xSn6-3xO12

Other Names for Rankamaite

Synonyms:

IMA1968-002

Name in Other Languages:
German:Rankamait
Spanish:Rankamaita

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 Rankamaite

Reference List:
American Mineralogist (1970): 55: 1814.

Mineralogicheskii Zhurnal (1984): 6: 42-55.

Daniel Atencio, Reynaldo R. Contreira Fo., Stuart J. Mills, Jose M.V. Coutinho, Sara B. Honorato, Alejandro P. Ayala, Javier Ellena, and Marcelo B. de Andrade (2011) Rankamaite from the Urubu pegmatite, Itinga, Minas Gerais, Brazil: crystal chemistry and Rietveld refinement. Am. Mineral. 96, 1455–1460.

Internet Links for Rankamaite

mindat.org URL:
https://www.mindat.org/min-3362.html
Please feel free to link to this page.
Search Engines:
  • Look for Rankamaite on Google
  • Look for Rankamaite images on Google
    • External Links:
  • Look for Rankamaite on Webmineral
  • Look for Rankamaite on Wikipedia
  • Look for Rankamaite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Handbook of Mineralogy page PDF
    • Mineral Dealers:
  • Search for - Rankamaite - on e-Rocks Mineral Sales & Auctions
  • High-end worldwide specimens & outstanding customer service
  • Buy from David K Joyce minerals
  • Buy from McDougall Minerals
  • Top quality minerals from Kristalle of California
  • The Arkenstone - Fine Minerals
  • Fine Minerals from Weinrich Minerals, Inc.
  • Wilensky Fine Minerals
  • Find Rankamaite on www.crystalclassics.co.uk
  • MINSERVICE - buy on www.minservice.com - Worldwide Classical and Rarity
  • Quality Minerals at Fair Prices
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Rare and Unusual minerals at Mineralogical Research Company

    • Localities for Rankamaite

    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.
    Brazil
     
    • Minas Gerais
      • Itinga
        • Monte Belo
    		Daniel Atencio, Reynaldo R. Contreira Fo., Stuart J. Mills, Jose M.V. Coutinho, Sara B. Honorato, Alejandro P. Ayala, Javier Ellena, and Marcelo B. de Andrade (2011) Rankamaite from the Urubu pegmatite, Itinga, Minas Gerais, Brazil: crystal chemistry and Rietveld refinement. Am. Mineral. 96, 1455–1460.
    Democratic Republic of Congo (Zaïre)
     
    • Katanga (Shaba)
    		Voloshin A.V., Pakhomovskii Ya.A. (1988) Mineralogy of tantalum and niobium in rare-metal pegmatites, - Leningrad, Nauka, p. 240 (in Rus.)
    • Nord-Kivu
      • Masisi Mts
    		Bul. Geol. Soc. Fin. 41 (1969), 47; V.D.C. Daltry (1992) The Type Mineralogy Of Africa : Zaire pp 33-62
    Safiannikoff, A. and van Wambeke, L. (1961): Sur un terme plombifere du groupe pyrochlore-microlite. Bulletin de la Société Francaise de Minéralogie et de Cristallographie 84: 382-384
    Kazakhstan
     
    • Eastern Kazakhstan Province (Shyghys Qazaqstan Oblysy; Vostochno-Kazakhstanskaya Oblast')
      • Kalba Range
        • Irtysh River
    		A.V. Voloshin analytical data
    Voloshin, A.V., Pakomovskii, Ya.A., Stepanov, V.I., Tyusheva, F.N. (1983): Lithiotantite, Li,(Ta,Nb)3O8, a new mineral from granite pegmatites of Eastern Kazakhstan. Mineralogiceskij Zhurnal, 5(1), 91-95. Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Mineral and/or Locality  
    Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
    Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2017, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
    Privacy Policy - Terms & Conditions - Contact Us Current server date and time: July 22, 2017 17:53:55 Page generated: June 26, 2017 19:19:36
    Go to top of page