Tavorite Mineral Data

Tavorite Mineral Data +

[Mineral Auctions] [Register] [Current Auctions] [Log In] [www.danweinrich.com]
Dan Weinrich Auctions
Specializing In Live Weekly Auctions Of Top Quality Mineral Specimens
The Place To Find Great Specimens At Great Prices!

General Tavorite Information

Chemical Formula:

LiFe+++(PO4)(OH)

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

Empirical Formula:

LiFe³⁺(PO₄)(OH)

Environment:

Lithium-bearing pegmatites.

IMA Status:

Valid Species (Pre-IMA) 1955

Locality:

Sapucaia pegmatite, Galileia, Minas Gerias, Brazil. Link to MinDat.org Location Data.

Name Origin:

Named for Elysairio Tavora (1911-), mineralogist, University of Brazil, Rio de Janerio, Brazil.

Synonym:

ICSD 20808

PDF 41-1376

Tavorite Image

Images:

Tavorite

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

Images:

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

Axial Ratios:

a:b:c =0.9681:1:1.4022

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

Crystal System:

TriclinicSpace Group: P1 or P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.045(1), 3.285(0.9), 4.99(0.5),

Physical Properties of Tavorite

Cleavage:

[???] Distinct, [???] Distinct, [???] Distinct

Color:

Grass green, Greenish yellow, Yellow green, Yellow.

Density:

3.288

Diaphaniety:

Transparent to Translucent

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

light green

Optical Properties of Tavorite

Gladstone-Dale:

CI meas= 0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.082 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2406,KPDmeas= 0.2474,KC= 0.262

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

Electron Density:

r_electron=3.20 gm/cc
note: r_Tavorite=3.29 gm/cc.

Fermion Index

Fermion Index = 0.00997
Boson Index = 0.99003

Photoelectric:

PE_Tavorite= 10.46 barns/electron
U=PE_Tavorite x r_electron= 33.45 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tavorite is Not Radioactive

Tavorite Classification

Dana Class:

41.5.9.1 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.5)where (A B)2 (XO4) Zq

(41.5.9)Dana Group

41.5.9.1 Tavorite LiFe(PO4)(OH) P1 or P1 Tri

Strunz Class:

VII/B.02-60 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O,OH, cations of medium size: Mg, Mn, Fe, Cu, Zn, Pseudomalachite group and related compounds

VII/B.02 - Amblygonite group, Griphite - Tavorite

VII/B.02-10 Griphite Ca(Mn,Na,Li)6FeAl2(PO4)6(F,OH)2 P a3 2/m 3

VII/B.02-20 Tancoite HNa2LiAl(PO4)2(OH) Pbcb 2/m 2/m 2/m

VII/B.02-30 Amblygonite (Li,Na)Al(PO4)(F,OH) P1 1

VII/B.02-40 Montebrasite LiAl(PO4)(OH,F) P1 1

VII/B.02-50 Natromontebrasite (Na,Li)Al(PO4)(OH,F) P1 1

VII/B.02-60 Tavorite LiFe(PO4)(OH) P1 or P1 Tri

Other Tavorite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Tavorite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

Search for Tavorite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Tavorite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Tavorite Mineral Data :

Ask about Tavorite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Tavorite Specimen Label here :

Tavorite

LiFe+++(PO4)(OH)
Dana No: 41.5.9.1 Strunz No: VII/B.02-60
Locality:

Notes: