Mineralogy Database

Tavorite Mineral Data

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General Tavorite Information

Help on Chemical  Formula: Chemical Formula: LiFe+++(PO4)(OH)
Help on Composition: Composition: Molecular Weight = 174.77 gm
   Lithium      3.97 %  Li    8.55 % Li2O
   Iron        31.96 %  Fe   45.69 % Fe2O3
   Phosphorus  17.72 %  P    40.61 % P2O5
   Hydrogen     0.58 %  H     5.15 % H2O
   Oxygen      45.77 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: LiFe3+(PO4)(OH)
Help on Environment: Environment: Lithium-bearing pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1955
Help on Locality: Locality: Sapucaia pegmatite, Galileia, Minas Gerias, Brazil. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Elysairio Tavora (1911-), mineralogist, University of Brazil, Rio de Janerio, Brazil.
Help on Name Pronunciation: Name Pronunciation: Tavorite Say TAVORITE
Help on Synonym: Synonym: ICSD 20808
  PDF 41-1376

Tavorite Image

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Comments: Tabular, prismatic crystals of tavorite on matrix.
Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

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  Tavorite   Hureaulite

Comments: Lime green tavorite micro crystals with pink, gemmy hureaulite.
Location: Tip Top mine, Custer Co., South Dakota, United States. Scale: Picture size 1.0 cm.
© Tom Loomis / Dakota Matrix

Tavorite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9681:1:1.4022
Help on Cell Dimensions: Cell Dimensions: a = 5.138, b = 5.307, c = 7.442, Z = 2; alpha = 67.48°, beta = 67.72°, gamma = 81.98° V = 171.76 Den(Calc)= 3.38
Help on Crystal System: Crystal System: Triclinic Space Group: P1 or P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.045(1), 3.285(0.9), 4.99(0.5),

Physical Properties of Tavorite

Help on Cleavage: Cleavage: {???} Distinct, {???} Distinct, {???} Distinct
Help on Color: Color: Grass green, Greenish yellow, Yellow green, Yellow.
Help on Density: Density: 3.288
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light green

Optical Properties of Tavorite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.073 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2428,KPDmeas= 0.2474,KC= 0.262
Ncalc = 1.86 - 1.88
Help on Optical Data: Optical Data: Biaxial (+), a=1.795, b=1.81, g=1.835, bire=0.0400, 2V(Calc)=78, 2V(Meas)=74.

Calculated Properties of Tavorite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.20 gm/cc
note: Specific Gravity of Tavorite =3.29 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0099737601
Boson Index = 0.9900262399
Help on Photoelectric: Photoelectric: PETavorite = 10.46 barns/electron
U=PETavorite x rElectron Density= 33.45 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tavorite is Not Radioactive

Tavorite Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.09)Dana Group Tavorite LiFe(PO4)(OH) P1 or P1 Tri
Help on  Strunz Class: Strunz Class: 08.BB.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BB -With only medium-sized cations, (OH, etc.):RO4 � 1:1
08.BB.05 Amblygonite (Li,Na)Al(PO4)(F,OH) P1 1
08.BB.05 Natromontebrasite? (Na,Li)Al(PO4)(OH,F) P1 1
08.BB.05 Montebrasite? LiAl(PO4)(OH,F) P1 1
08.BB.05 Tavorite LiFe(PO4)(OH) P1 or P1 Tri

Other Tavorite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Tavorite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 08.BB.05





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