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Simpsonite

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Edward Sydney Simpson
Formula:
Al4(Ta,Nb)3O13(OH,F)
Colour:
Yellow, light brown or colourless, gray
Lustre:
Adamantine, Dull
Hardness:
7 - 7½
Specific Gravity:
6.35 (Calculated)
Crystal System:
Trigonal
Name:
Named in 1938 by Harry Bowley in honor of Edward Sydney Simpson [March 11, 1875 Woollahara, Western Australia, Australia - August 30, 1939 South Perth, Western Australia, Australia], government mineralogist and chemist of the Geological Survey of Western Australia. The Simpson Desert was also named for him.

Classification of Simpsonite

Approved, 'Grandfathered' (first described prior to 1959)
4.DC.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
C : With medium-sized cations; sheets of edge-sharing octahedra
8.7.5.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
7 : Miscellaneous
18.1.19

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

Physical Properties of Simpsonite

Adamantine, Dull
Transparency:
Translucent
Colour:
Yellow, light brown or colourless, gray
Streak:
white
Hardness:
7 - 7½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Density:
6.35 g/cm3 (Calculated)

Optical Data of Simpsonite

Type:
Uniaxial (-)
RI values:
nω = 2.045 nε = 2.025
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of Simpsonite

Formula:
Al4(Ta,Nb)3O13(OH,F)
IMA Formula:
Al4Ta3O13(OH)

Crystallography of Simpsonite

Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
P3
Cell Parameters:
a = 7.37 Å, c = 4.51 Å
Ratio:
a:c = 1 : 0.612
Unit Cell V:
212.15 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Crystals tabular to short prismatic [0001].

X-Ray Powder Diffraction

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Type Occurrence of Simpsonite

Geological Setting of Type Material:
Primary mineral in Ta-rich granite pegmatites

Synonyms of Simpsonite

Other Language Names for Simpsonite

German:Simpsonit
Portuguese:Calogerasita
Spanish:Simpsonita

Common Associates

Associated Minerals Based on Photo Data:
Tantalite-(Mn)9 photos of Simpsonite associated with Tantalite-(Mn) on mindat.org.
Alumotantite3 photos of Simpsonite associated with Alumotantite on mindat.org.
Rankamaite3 photos of Simpsonite associated with Rankamaite on mindat.org.
Cassiterite2 photos of Simpsonite associated with Cassiterite on mindat.org.
Cesstibtantite1 photo of Simpsonite associated with Cesstibtantite on mindat.org.
Tapiolite-(Fe)1 photo of Simpsonite associated with Tapiolite-(Fe) on mindat.org.
Hydroxykenomicrolite1 photo of Simpsonite associated with Hydroxykenomicrolite on mindat.org.
Lithian Muscovite1 photo of Simpsonite associated with Lithian Muscovite on mindat.org.
Wodginite1 photo of Simpsonite associated with Wodginite on mindat.org.

Related Minerals - Nickel-Strunz Grouping

4.DC.05BahianiteAl5Sb3O14(OH)2

Related Minerals - Hey's Chemical Index of Minerals 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
18.1.7Rankamaite(Na,K)3(Ta,Nb,Al)11(O,OH)31
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
18.1.20Sosedkoite(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

Fluorescence of Simpsonite

may fluoresce blue-white, SWUV

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 Simpsonite

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bowley (1938-39), Report of the Department of Mines Western Australia: 93: 88.
Taylor (1938-39), Journal of the Royal Society of Western Australia: 25: 93.
American Mineralogist (1940): 25: 313.
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 771.
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1981): 110: 341-342.
Canadian Mineralogist (1992): 30: 663-671.

Internet Links for Simpsonite

mindat.org URL:
https://www.mindat.org/min-3670.html
Please feel free to link to this page.
Specimens:
The following Simpsonite specimens are currently listed for sale on minfind.com.

Localities for Simpsonite

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.
Australia
 
  • Western Australia
    • Bridgetown-Greenbushes Shire
      • Greenbushes Tinfield
Jacobson, M., Calderwood, M., Grguric, B.(2007): Pegmatites of Western Australia
    • Cue Shire
      • Meka Station
Pegmatites of Western Australia; M Jacobson, M Calderwood, B Grguric; Hesperian Press, Perth, 2007.
    • Mount Magnet Shire
      • Dalgaranga Station
Pegmatites of Western Australia; M Jacobson, M Calderwood, B Grguric; Hesperian Press, Perth, 2007
    • Port Hedland Shire
      • Wallareenya Station
Mineralogical Magazine 1963 33 : 458-466. Calderwood, M.A., Grguric, B.A., Jacobson, M.I., (2007) Guidebook to the Pegmatites of Western Australia. Hesperian Press, Carlisle, Western Australia.
Brazil
 
  • Minas Gerais
    • Itinga
      • Monte Belo
Analysed (Reynaldo Contreira information); 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.
No reference listed
    • Borborema mineral province
      • Equador
Rob Lavinsky; http://rruff.geo.arizona.edu/doclib/hom/parabariomicrolite.pdf.; Mineralogical Magazine 1963 33 : 458-466; Canadian Mineralogist (1986): 24: 655-663.; Beurlen, H., Da Silva, M.R.R., Thomas, R., Soares, D.R., and Olivier, P. (2008): Nb–Ta–(Ti–Sn) oxide mineral chemistry as tracer of rare element granitic pegmatite fractionation in the Borborema Province, Northeastern Brazil. Mineralium Deposita 43, 207-228.; Beurlen, H., Soares, D. R., Thomas, R., Prado-Borges, L. E., & Castro, C. D. (2005). Mineral chemistry of tantalate species new in the Borborema Pegmatitic Province, Northeast Brazil. Anais da Academia Brasileira de Ciências, 77(1), 169-182
Canada
 
  • Manitoba
    • Lac-du-Bonnet area
      • Bernic Lake
www.davidkjoyceminerals.com
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.)
  • Maniema
Uher, P., Cerny, P., & Chapman, R. (2008). Foordite-thoreaulite, Sn2+ Nb2O6Sn2+ Ta2O6: compositional variations and alteration products. European Journal of Mineralogy, 20(4), 501-516.
  • Nord-Kivu
    • Masisi Mts
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
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Russia
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Voron'i Tundry
J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997); Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; P.M. Kartashov data; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Zimbabwe
 
  • Mashonaland East
    • Mudzi District
Hornung. G. PhD thesis. Pegmatites of th N. Mtoko Region. University of Leeds, Research Institute of African Geology. !961
Mineralogical Magazine 1963 33 : 458-466
  • Masvingo
    • Bikita area
Cerny, P., Anderson, A. J., Tomascak, P. B., & Chapman, R. (2003). Geochemical and morphological features of beryl from the Bikita granitic pegmatite, Zimbabwe. The Canadian Mineralogist, 41(4), 1003-1011.
J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997); Mineralogical Magazine 1946 27 : 157-165
Mineral and/or Locality  
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