Ferrisicklerite Mineral Data

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General Ferrisicklerite Information

Chemical Formula:

Li(Fe+++,Mn++)PO4

Composition:

Molecular Weight = 157.53 gm

Lithium 4.41 % Li 9.48 % Li₂O

Manganese 8.72 % Mn 11.26 % MnO

Iron 26.59 % Fe 38.01 % Fe₂O₃

Phosphorus 19.66 % P 45.05 % P₂O₅

Oxygen 40.63 % O

______ ______

100.00 % 103.81 % = TOTAL OXIDE

Empirical Formula:

LiFe³⁺_0.75Mn²⁺_0.25(PO₄)

Environment:

Late hydrothermal alteration or weathering of triphylite-lithiophilite in complex zoned granite pegmatites.

IMA Status:

Valid Species (Pre-IMA) 1937

Locality:

Varutrask pegmatite, 15 km northwest of Skelleftea, Vasterbotten, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for its dominant ferric iron content and relation to sicklerite.

Name Pronunciation:

Ferrisicklerite + Pronunciation

Ferrisicklerite Image

Images:

Ferrisicklerite

Comments: Dark brown massive ferrisicklerite.
Location: Palermo Mine, North Groton, Grafton County, New Hampshire, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferrisicklerite Crystallography

Axial Ratios:

a:b:c =0.59:1:0.4783

Cell Dimensions:

a = 5.916, b = 10.026, c = 4.7956, Z = 4; V = 284.45 Den(Calc)= 3.68

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/I_o): 2.959(1), 5.01(0.7), 4.33(0.4),

Crystal Structure:

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Alberti A , Acta Crystallographica, Section B , 32 (1976) p.2761-2764, Crystal structure of ferrisicklerite, Li<1(Fe3+,Mn2+)PO4, Locality: Sidi-Bou-Othmane, Jebilet, Morocco

Physical Properties of Ferrisicklerite

Cleavage:

{100} Good

Color:

Yellow brown, Dark brown.

Density:

3.41

Diaphaneity:

Opaque

Hardness:

4 - Fluorite

Luster:

Earthy (Dull)

Streak:

light brown

Optical Properties of Ferrisicklerite

Gladstone-Dale:

CI meas= 0.069 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.137 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2188,KPDmeas= 0.2361,KC= 0.2535
Ncalc = 1.86 - 1.93

Optical Data:

Biaxial (-), a=1.79, b=1.805, g=1.82, bire=0.0300, 2V(Calc)=88, 2V(Meas)=85.

Calculated Properties of Ferrisicklerite

Electron Density:

Bulk Density (Electron Density)=3.28 gm/cc
note: Specific Gravity of Ferrisicklerite =3.41 gm/cc.

Fermion Index:

Fermion Index = 0.0091363025
Boson Index = 0.9908636975

Photoelectric:

PE_{Ferrisicklerite}= 11.25 barns/electron
U=PE_{Ferrisicklerite} x rElectron Density= 36.89 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ferrisicklerite is Not Radioactive

Ferrisicklerite Classification

Dana Class:

38.01.04.01 (38)Anhydrous Phosphates, etc

(38.01)A+ B++ XO4

(38.01.04)Dana Group

38.01.04.01 Ferrisicklerite Li(Fe,Mn)PO4 Pmnb 2/m 2/m 2/m

38.01.04.02 Sicklerite Li(Mn,Fe)PO4 Pmnb 2/m 2/m 2/m

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 Ferrisicklerite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Ferrisicklerite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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

Ferrisicklerite

Li(Fe+++,Mn++)PO4
Dana No: 38.01.04.01 Strunz No: 08.AB.10
Locality:

Notes: