Mineralogy Database

Sicklerite Mineral Data

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General Sicklerite Information

Help on Chemical  Formula: Chemical Formula: Li(Mn++,Fe+++)PO4
Help on Composition: Composition: Molecular Weight = 157.08 gm
   Lithium      4.42 %  Li    9.51 % Li2O
   Manganese   26.23 %  Mn   33.87 % MnO
   Iron         8.89 %  Fe   11.43 % FeO
   Phosphorus  19.72 %  P    45.18 % P2O5
   Oxygen      40.74 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: LiMn2+0.75Fe2+0.25(PO4)
Help on Environment: Environment: Granitic pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1912
Help on Locality: Locality: Stuart mine, Queen Mountain, Pala, San Diego Co., California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the discoverer of the Pala pegmatite deposits, Sickler.
Help on Name Pronunciation: Name Pronunciation: Sicklerite + Pronunciation Say SICKLERITE

Sicklerite Image

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  Sicklerite   Lithiophilite

Comments: Mottled tan-green-pink massive sicklerite with dark brown lithiophilite on quartz.
Location: Custer Mountain Lode, Custer County, South Dakota, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Sicklerite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5909:1:0.4763
Help on Cell Dimensions: Cell Dimensions: a = 5.9468, b = 10.0631, c = 4.7935, Z = 4; V = 286.86 Den(Calc)= 3.64
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pmnb
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.971(1), 2.495(0.75), 3.497(0.4),

Physical Properties of Sicklerite

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Dark brown, Yellow.
Help on Density: Density: 3.4 - 3.45, Average = 3.42
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Cleaveable - Easily cleaved into fragments.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: light ochre brown

Optical Properties of Sicklerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.103 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.038 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2076,KPDmeas= 0.2207,KC= 0.2001
Ncalc = 1.68 - 1.73
Help on Optical Data: Optical Data: Biaxial (-), a=1.715-1.74, b=1.735-1.77, g=1.745-1.83, bire=0.0300-0.0900, 2V(Calc)=68-74, 2V(Meas)=60-90. Dispersion relatively strong.
Help on Pleochroism (x): Pleochroism (x): colorless or deep red.
Help on Pleochroism (y): Pleochroism (y): colorless or pale red.
Help on Pleochroism (z): Pleochroism (z): colorless or very pale red.

Calculated Properties of Sicklerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.49 gm/cc
note: Specific Gravity of Sicklerite =3.64 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0053940389
Boson Index = 0.9946059611
Help on Photoelectric: Photoelectric: PESicklerite = 10.44 barns/electron
U=PESicklerite x rElectron Density= 36.41 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Sicklerite is Not Radioactive

Sicklerite Classification

Help on  Dana Class: Dana Class: (38)Anhydrous Phosphates, etc
  (38.01)A+ B++ XO4
  (38.01.04)Dana Group Ferrisicklerite Li(Fe,Mn)PO4 Pmnb 2/m 2/m 2/m Sicklerite Li(Mn,Fe)PO4 Pmnb 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 Sicklerite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Sicklerite :
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
15 - Scandinavian mineral gallery

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Dana No: Strunz No: 08.AB.10





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