Sicklerite Mineral Data + Say SICKLERITE


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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.
 

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 - DipyramidalH-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 Diaphaniety: Diaphaniety: 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: None.
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
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:

relectron=3.49 gm/cc
note: rSicklerite =3.64 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00539
Boson Index = 0.99461
Help on Photoelectric: Photoelectric:

PESicklerite = 10.44 barns/electron
U=PESicklerite x relectron= 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: 38.1.4.2 (38)Anhydrous Phosphates, etc
  (38.1)A+ B++ XO4
  (38.1.4)Dana Group
 
38.1.4.1 Ferrisicklerite Li(Fe,Mn)PO4 Pmnb 2/m 2/m 2/m
 
38.1.4.2 Sicklerite Li(Mn,Fe)PO4 Pmnb 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: VII/A.02-40 VII - Phosphates, Arsenates and Vanadates
  VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions. cations of medium size: Mostly Fe, Mn
  VII/A.02 - Simferrite - Natrophilite series
 
VII/A.02-05 Simferite Li(Mg,Fe,Mn)2(PO4)2 Pbnm,Pbn21 Ortho
 
VII/A.02-10 Triphylite LiFePO4 Pbnm 2/m 2/m 2/m
 
VII/A.02-20 Lithiophilite LiMnPO4 Pmnb 2/m 2/m 2/m
 
VII/A.02-30 Ferrisicklerite Li(Fe,Mn)PO4 Pmnb 2/m 2/m 2/m
 
VII/A.02-40 Sicklerite Li(Mn,Fe)PO4 Pmnb 2/m 2/m 2/m
 
VII/A.02-50 Heterosite FePO4 Pmnb 2/m 2/m 2/m
 
VII/A.02-60 Purpurite MnPO4 Pmnb 2/m 2/m 2/m
 
VII/A.02-70 Maricite NaFePO4 Pmnb 2/m 2/m 2/m
 
VII/A.02-80 Natrophilite NaMnPO4 Pnam 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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 - Minerals of Wisconsin 13 -QUT Mineral Atlas 14 - Scandinavian mineral gallery 15 -École des Mines de Paris

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Sicklerite

Li(Mn++,Fe+++)PO4
Dana No: 38.1.4.2 Strunz No: VII/A.02-40
Locality:

 

Notes:

 

 
   
 
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