Ferrisicklerite Mineral Data

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)

IMA Status:

Valid Species (Pre-IMA) 1937

Locality:

Link to MinDat.org Location Data.

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

Diaphaniety:

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

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:

r_electron=3.28 gm/cc
note: r_{Ferrisicklerite}=3.41 gm/cc.

Fermion Index

Fermion Index = 0.00913
Boson Index = 0.99087

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ferrisicklerite is Not Radioactive

Ferrisicklerite Classification

Dana Class:

38.1.4.1 (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

Strunz Class:

VII/A.02-30 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 Ferrisicklerite Information

References:

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 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 - WWW-MINCRYST 12 -École des Mines de Paris

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Ferrisicklerite

Li(Fe+++,Mn++)PO4
Dana No: 38.1.4.1 Strunz No: VII/A.02-30
Locality:

Notes: