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Tavorite

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Formula:
LiFe3+(PO4)(OH)
Colour:
Grass-green, yellow-green
Lustre:
Sub-Vitreous, Resinous, Waxy, Greasy
Hardness:
5
Specific Gravity:
3.32
Crystal System:
Triclinic
Name:
Named in 1954 by Marie Louise Lindberg (Smith) and William T. pecora in honor of Elysairio Tavora [b. 1911 Brasil], professor of mineralogy, Universidad de Brasil Rio de Janeiro, Brasil.
Isostructural with:
Hide all sections | Show all sections

Classification of TavoriteHide

Approved, 'Grandfathered' (first described prior to 1959)
8.BB.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
B : With only medium-sized cations, (OH, etc.):RO4 about 1:1
41.5.9.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
19.1.14

19 : Phosphates
1 : Phosphates of the alkali metals

Physical Properties of TavoriteHide

Sub-Vitreous, Resinous, Waxy, Greasy
Transparency:
Transparent, Translucent
Colour:
Grass-green, yellow-green
Streak:
Pale yellow green
Hardness:
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {100}, good on {110}, distinct on {011}, and on {001}, imperfect.
Fracture:
Micaceous
Density:
3.32 g/cm3 (Measured)    3.33 g/cm3 (Calculated)

Optical Data of TavoriteHide

Type:
Biaxial (+)
RI values:
nα = 1.795 nβ = 1.811 nγ = 1.861
2V:
Measured: 74° , Calculated: 78°
Birefringence:
0.066
Max Birefringence:
δ = 0.066
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r << v
Optical Extinction:
Y^b ~ 0°, Z^c ~38°, X^a ~ 15°
Pleochroism:
Strong
Comments:
X = Y = yellow-green, Z = colorless

Chemical Properties of TavoriteHide

Formula:
LiFe3+(PO4)(OH)
IMA Formula:
LiFe3+PO4(OH)

Crystallography of TavoriteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.340 Å, b = 7.283 Å, c = 5.110 Å
α = 109.29°, β = 97.86°, γ = 106.32°
Ratio:
a:b:c = 0.733 : 1 : 0.702
Unit Cell V:
174.14 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Bladed crystals, often rounded and/or etched. Found as fine-grained masses to sever mm

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.99 (50)
4.68 (30)
3.95 (20)
3.285 (90)
3.045 (100)
2.474 (40)
1.662 (3b)

Type Occurrence of TavoriteHide

General Appearance of Type Material:
Bright lime green scales and fine-grained masses
Geological Setting of Type Material:
Late stage phosphate mineralization in a granite pegmatite
Associated Minerals at Type Locality:

Other Language Names for TavoriteHide

German:Tavorit
Spanish:Tavorita

Relationship of Tavorite to other SpeciesHide

Other Members of this group:
AmblygoniteLiAl(PO4)FTric. 1 : P1
MontebrasiteLiAl(PO4)(OH)Tric. 1 : P1
NatromontebrasiteMasses of white mineral.Tric.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Hureaulite12 photos of Tavorite associated with Hureaulite on mindat.org.
Rockbridgeite10 photos of Tavorite associated with Rockbridgeite on mindat.org.
Barbosalite7 photos of Tavorite associated with Barbosalite on mindat.org.
Giniite6 photos of Tavorite associated with Giniite on mindat.org.
Triphylite4 photos of Tavorite associated with Triphylite on mindat.org.
Mélonjosephite2 photos of Tavorite associated with Mélonjosephite on mindat.org.
Robertsite1 photo of Tavorite associated with Robertsite on mindat.org.
Strengite1 photo of Tavorite associated with Strengite on mindat.org.
Leucophosphite1 photo of Tavorite associated with Leucophosphite on mindat.org.
Quartz1 photo of Tavorite associated with Quartz on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.BB.XArsenowagneriteMg2(AsO4)FMon. 2/m : P21/b
8.BB.05AmblygoniteLiAl(PO4)FTric. 1 : P1
8.BB.05MontebrasiteLiAl(PO4)(OH)Tric. 1 : P1
8.BB.10Triplite(Mn2+,Fe2+)2(PO4)(F,OH)Mon. 2/m
8.BB.10Zwieselite(Fe2+,Mn2+)2(PO4)FMon. 2/m : P21/b
8.BB.15SarkiniteMn2+2(AsO4)(OH)Mon. 2/m : P2/m
8.BB.15Triploidite(Mn2+,Fe2+)2(PO4)(OH)Mon. 2/m : P2/b
8.BB.15Wagnerite(Mg,Fe2+)2(PO4)FMon. 2/m : P21/b
8.BB.15Wolfeite(Fe2+,Mn2+)2(PO4)(OH)Mon. 2/m : P21/b
8.BB.15Stanĕkite(Mn2+,Fe2+,Mg)Fe3+(PO4)OMon.
8.BB.15JoosteiteMn2+(Mn3+,Fe3+)(PO4)OMon. 2/m
8.BB.15HydroxylwagneriteMg2(PO4)(OH)Mon. 2/m : P21/b
8.BB.20HoltedahliteMg2(PO4)(OH)Trig. 3m : P3 1m
8.BB.20Satterlyite(Fe2+,Mg,Fe)12(PO4)5(PO3OH)(OH,O)6Trig. 3m (3 2/m) : P3 1m
8.BB.25AlthausiteMg4(PO4)2(OH,O)(F,☐)Orth. mmm (2/m 2/m 2/m) : Pnma
8.BB.30AdamiteZn2(AsO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnnm
8.BB.30EveiteMn2+2(AsO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnnm
8.BB.30LibetheniteCu2(PO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnnm
8.BB.30OliveniteCu2(AsO4)(OH)Mon. 2/m : P21/m
8.BB.30ZincolibetheniteCuZn(PO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnnm
8.BB.30ZincoliveniteCuZn(AsO4)(OH)Orth. mmm (2/m 2/m 2/m) : Pnnm
8.BB.30AuriacusiteFe3+Cu2+(AsO4)OOrth. mmm (2/m 2/m 2/m) : Pnnm
8.BB.35ParadamiteZn2(AsO4)(OH)Tric. 1 : P1
8.BB.35TarbuttiteZn2(PO4)(OH)Tric. 1 : P1
8.BB.40BarbosaliteFe2+Fe3+2(PO4)2(OH)2Mon. 2/m : P21/b
8.BB.40HentscheliteCuFe3+2(PO4)2(OH)2Mon.
8.BB.40Lazulite(Mg,Fe2+)Al2(PO4)2(OH)2Mon. 2/m : P21/b
8.BB.40ScorzaliteFe2+Al2(PO4)2(OH)2Mon. 2/m : P21/b
8.BB.40WilhelmkleiniteZnFe3+2(AsO4)2(OH)2Mon.
8.BB.45TrolleiteAl4(PO4)3(OH)3Mon. 2/m : B2/b
8.BB.50NamibiteCu(BiO)2(VO4)(OH)Tric. 1 : P1
8.BB.55Phosphoellenbergerite(Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6Hex.
8.BB.60UrusoviteCuAl(AsO4)OMon.
8.BB.65TheoparacelsiteCu3(As2O7)(OH)2Orth.
8.BB.70TuraniteCu5(VO4)2(OH)4Tric. 1 : P1
8.BB.75StoiberiteCu5(VO4)2O2Mon.
8.BB.80FingeriteCu11(VO4)6O2Tric. 1 : P1
8.BB.85AverieviteCu6(VO4)2O2Cl2Trig.
8.BB.90LipscombiteFe2+Fe3+2(PO4)2(OH)2Tet.
8.BB.90RichelliteCaFe3+2(PO4)2(OH,F)2Amor.
8.BB.90ZinclipscombiteZnFe3+2(PO4)2(OH)2Tet. 4 2 2 : P43 21 2

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.1.1LithiophosphateLi3PO4Orth. mm2 : Pmn21
19.1.2OlympiteNa5Li(PO4)2Orth.
19.1.3NahpoiteNa2HPO4Mon. 2/m : P21/m
19.1.4DorfmaniteNa2HPO4 · 2H2OOrth.
19.1.5NalipoiteNaLi2PO4Orth.
19.1.6StercoriteNa(NH4)HPO4 · 4H2OTric.
19.1.7Archerite(K,NH4)(H2PO4)Tet. 4 2m : I4 2d
19.1.8Biphosphammite(NH4,K)(H2PO4)Tet. 4 2 2 : I41 2 2
19.1.9Phosphammite(NH4)2(HPO4)Mon. 2/m : P21/b
19.1.10LithiophiliteLiMn2+PO4Orth. mmm (2/m 2/m 2/m) : Pmna
19.1.11SickleriteLi1-x(Mn3+xMn2+1-x)PO4Orth.
19.1.12FerrisickleriteLi1-x(Fe3+xFe2+1-x)PO4Orth.
19.1.13TriphyliteLiFe2+PO4Orth. mmm (2/m 2/m 2/m) : Pmna
19.1.15MarićiteNaFe2+(PO4)Orth. mmm (2/m 2/m 2/m) : Pmna

Fluorescence of TavoriteHide

Not fluorescent

Other InformationHide

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 TavoriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Science (1954), 119, 739
Lindberg, M. L. and Pecora, W. T. (1955) Tavorite and barbosalite, two new phosphate minerals from Minas Gerais, Brazil. American Mineralogist: 40: 952-966.
American Mineralogist: 1977): 62: 559.
Soviet Physics – Crystallography: 29: 27-30.

Internet Links for TavoriteHide

Localities for TavoriteHide

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.
Brazil
 
  • Minas Gerais
    • Conselheiro Pena
Canadian Mlneralogist Vol. 20, pp. 87-89 (1982)
Sergio Varvello
Sergio Varvello collection
Baijot, M., Hatert, F., Dal Rio, F. & Philipo, S. (2014) Mineralogy and petrography of phosphate mineral association from the Jocão pegmatite, Minas Gerais, Brazil. Canadian Mineralogist 52, 373-397.
    • Galiléia
      • Laranjeiras
[MinRec 12:69]
      • Sapucaia do Norte
AmMin 89:1087
Science (1954): 119: 739; Lindberg, M.L. and Pecora, W.T. (1955) Tavorite and barbosalite, two new phosphate minerals from Minas Gerais, Brazil. American Mineralogist 40, 952-966.
  • Paraíba
    • Borborema mineral province
      • Pedra Lavrada
Am Min (1955) 40:55-63
R. Wegner, H. Pöllmann, T. Witzke, & W. Schuckmann (1998): Colquiriite, carlhintzeite, ralstonite and pachnolite from Serra Branca-Pegmatite/Brazil.- Proceedings 17th General Meeting, IMA, August 1998, Toronto, A151
Germany
 
  • Bavaria
    • Upper Palatinate
      • Waidhaus
Dill, H.G. (2009) The Hagendorf-Pleystein phosphate pegmatites (NE Bavaria, Germany) - A mineralogical, chronological and sedimentological overview. Estudos Geológicos: 19(2): 117-120.
http://www.berthold-weber.de/h_miner.htm
Madagascar
 
  • Fianarantsoa Province
    • Amoron'i Mania Region
      • Ampandramaika-Malakialina Pegmatite Field
        • Ambatofinandrahana District
Behier, J. (1960): Contribution á la mineralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive, p 63-64
Morocco
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Tazenakht
FRANSOLET, A.-M. (1974) Les phosphates lithiques des pegmatites de la plaine des Zenaga (Anti-Atlas, Maroc). Notes Serv. géol. Maroc, 35, 137-143
  • Marrakech-Safi Region
    • Rehamna Province
      • Jebilet Mtn (Djebilet Mtn)
        • Sidi Bou Othmane
Favreau, G. (2012): Deux pegmatites à phosphates de Sidi Bou Othmane (Maroc). Le Cahier des Micromonteurs, 3-2012, 71-109
Namibia
 
  • Erongo Region
    • Karibib District
      • Okatjimukuju Farm 55 (Friedrichsfelde Farm)
P. Keller and O. von Knorring, Eur. J. Mineral. , 1989, 1, pp. 567-593.
      • Okongava Ost Farm 72
Collection of Barry Murphy, Micromount specimen catalogue number 00896
      • Tsaobismund Farm 85
Contrib Mineral Petrol (1986) 92:502-517
      • Usakos
Von Bezing, L., Bode, R., and Jahn, S., (2008) Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern. 409 (in English).
Keller (1974)
Portugal
 
  • Viseu District
    • Mangualde
Mineralien Atlas
    • Sátão
      • Ferreira de Aves
        • Aldeia Nova
Romania
 
  • Sibiu Co.
    • Lotru-Cibin Mts
Androne, D.A.M., Buzgar, N., and Kasper, H.U. (2005): Proceedings of the Annual Scientific Session of The Geological Society of Romania, Rosia Montana, 20-21 May 2005, 16-26.
Rwanda
 
  • Western Province
    • Gatumba District
Bertossa, A., 1967. Inventaire des minéraux du Rwanda. Bulletin du Service Géologique de Rwanda 4, 25-45.; Daltry, V.D.C. and O. von Knorring (1998) Type-Mineralogy of Rwanda with Particular Reference to the Buranga Pegmatite. Geologica Belgica 1:1-9
South Africa
 
  • Northern Cape Province
    • ZF Mgcawu District
      • Kenhardt
Minerals of South Africa
Spain
 
  • Castile and Leon
    • Zamora
      • Villar del Buey
        • Pinilla de Fermoselle
USA
 
  • New Hampshire
    • Grafton Co.
      • Groton
Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
Mineralogical Record (1973) 4:103-130
  • South Dakota
    • Custer Co.
      • Custer District
        • Custer
Rocks & Min.:60:117.; Am Min (1969), 54:969-972
R&M 75:3 pp 156-169
R&M 75:3 pp 156-169
        • Fourmile
Rocks & Minerals: 60: 117.
        • Pringle
          • Cicero Peak
Rocks & Minerals: 75(3): 156-169.
      • Needles
R&M 75:3 pp 156-169
    • Pennington Co.
      • Keystone District
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
        • Keystone
Rocks & Minerals: 67(6): 380-388.
Mineral and/or Locality  
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