Mineralogy Database

Triphylite Mineral Data

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General Triphylite Information

Help on Chemical  Formula: Chemical Formula: LiFe++PO4
Help on Composition: Composition: Molecular Weight = 157.76 gm
   Lithium      4.40 %  Li    9.47 % Li2O
   Iron        35.40 %  Fe   45.54 % FeO
   Phosphorus  19.63 %  P    44.99 % P2O5
   Oxygen      40.57 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: LiFe2+(PO4)
Help on Environment: Environment: Secondary mineral commonly pseudomorphic of the original species.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1834
Help on Locality: Locality: Branchville, Connecticut, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek tri - "threefold" and fylon - "family" in allusion to the three cations in the formula.
Help on Name Pronunciation: Name Pronunciation: Triphylite + Pronunciation Say TRIPHYLITE
Help on Synonym: Synonym: ICSD 72545
  PDF 40-1499
 

Triphylite Image

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  Triphylite

Comments: Dark gray-blue prismatic triphylite crystals in pegmatite rock.
Location: Newry, Oxford County, Maine, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Triphylite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5819:1:0.454
Help on Cell Dimensions: Cell Dimensions: a = 6.0285, b = 10.3586, c = 4.7031, Z = 4; V = 293.69 Den(Calc)= 3.57
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.54(1), 3.51(0.9), 4.29(0.9),
Help on Forms: Forms:

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Help on Above

Forms: ( 0 1 0) ( 1 2 0) ( 0 2 1) ( 0 1 1) ( 1 0 0)

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Physical Properties of Triphylite

Help on Cleavage: Cleavage: {001} Perfect, {110} Good
Help on Color: Color: Gray, Bluish gray, Brownish, Blackish.
Help on Density: Density: 3.4 - 3.6, Average = 3.5
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: grayish white
 

Optical Properties of Triphylite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1944,KPDmeas= 0.1983,KC= 0.197
Ncalc = 1.67 - 1.71
Help on Optical Data: Optical Data: Biaxial (+/-), a=1.689-1.694, b=1.689-1.695, g=1.695-1.702, bire=0.0060-0.0080
 

Calculated Properties of Triphylite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.37 gm/cc
note: Specific Gravity of Triphylite =3.50 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PETriphylite = 11.65 barns/electron
U=PETriphylite x rElectron Density= 39.29 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Triphylite is Not Radioactive
 

Triphylite Classification

Help on  Dana Class: Dana Class: 38.01.01.01 (38)Anhydrous Phosphates, etc
  (38.01)A+ B++ XO4
  (38.01.01)Triphylite Group
 
38.01.01.01 Triphylite LiFePO4 Pbnm 2/m 2/m 2/m
 
38.01.01.02 Lithiophilite LiMnPO4 Pmnb 2/m 2/m 2/m
 
38.01.01.03 Natrophilite NaMnPO4 Pnam 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.AB.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AB -With medium-sized cations
 
08.AB.10 Ferrisicklerite Li(Fe,Mn)PO4 Pmnb 2/m 2/m 2/m
 
08.AB.10 Heterosite FePO4 Pmnb 2/m 2/m 2/m
 
08.AB.10 Natrophilite NaMnPO4 Pnam 2/m 2/m 2/m
 
08.AB.10 Lithiophilite LiMnPO4 Pmnb 2/m 2/m 2/m
 
08.AB.10 Purpurite MnPO4 Pmnb 2/m 2/m 2/m
 
08.AB.10 Sicklerite Li(Mn,Fe)PO4 Pmnb 2/m 2/m 2/m
 
08.AB.10 Simferite Li(Mg,Fe,Mn)2(PO4)2 Pbnm or Pbn21 Ortho
 
08.AB.10 Triphylite LiFePO4 Pbnm 2/m 2/m 2/m
 

Other Triphylite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Triphylite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Scandinavian mineral gallery
17 - WWW-MINCRYST

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

Triphylite

LiFe++PO4
Dana No: 38.01.01.01 Strunz No: 08.AB.10
Locality:

 

Notes:

 

 
   
 


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