Lithiophilite Mineral Data

Lithiophilite Mineral Data +

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General Lithiophilite Information

Chemical Formula:

LiMnPO4

Composition:

Molecular Weight = 156.85 gm

Lithium 4.43 % Li 9.53 % Li₂O

Manganese 35.03 % Mn 45.23 % MnO

Phosphorus 19.75 % P 45.25 % P₂O₅

Oxygen 40.80 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

LiMn²⁺(PO₄)

Environment:

Istostructural with olivine.

IMA Status:

Valid Species (Pre-IMA) 1878

Locality:

Branchville, Redding, Fairfield Co., Connecticut, USA Link to MinDat.org Location Data.

Name Origin:

Named from the composition, Lithium, and from the Greek for "friend".

Synonym:

ICSD 25834

PDF 33-803

Lithiophilite Image

Images:

Lithiophilite

Comments: Twinned crystals of yellowish brown lithiophilite.
Location: Foote mine, Kings Mountain, Cleveland County, North Carolina, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Lithiophilite Sicklerite

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

Images:

Lithiophilite Triploidite

Comments: Salmon-colored prismatic crystalline triploidite with brown lithiophilite.
Location: Capoeira Mine, near Parelhas, Rio Grande do Norte, Brazil. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Lithiophilite Crystallography

Axial Ratios:

a:b:c =0.5839:1:0.4524

Cell Dimensions:

a = 6.108, b = 10.459, c = 4.732, Z = 4; V = 302.30 Den(Calc)= 3.45

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): 2.548(1), 3.051(0.9), 3.516(0.5),

Forms:

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Crystal Structure:

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Losey A , Rakovan J F , Hughes J M , Francis C A , Dyar M D , The Canadian Mineralogist , 42 (2004) p.1105-1115, Structural variation in the lithiophilite-triphylite series, and other olivine-group structures, Note: sample Trip06, Locality: Bennett Quarry, Buckfield, Maine

View Additional jPOWD Structure files for Lithiophilite
[1]

Physical Properties of Lithiophilite

Cleavage:

[100] Perfect, [010] Very Good, [011] Imperfect

Color:

Brown, Yellowish brown, Salmon, Brownish, Blackish.

Density:

3.34

Diaphaniety:

Transparent to Translucent

Fracture:

Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

4-5 - Fluorite-Apatite

Luster:

Vitreous - Resinous

Streak:

gray white

Optical Properties of Lithiophilite

Gladstone-Dale:

CI meas= -0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1956,KPDmeas= 0.202,KC= 0.2011

Optical Data:

Biaxial (+), a=1.669, b=1.673, g=1.682, bire=0.0130, 2V(Calc)=68, 2V(Meas)=65.

Calculated Properties of Lithiophilite

Electron Density:

r_electron=3.19 gm/cc
note: r_{Lithiophilite}=3.34 gm/cc.

Fermion Index

Fermion Index = 0.00351
Boson Index = 0.99649

Photoelectric:

PE_{Lithiophilite}= 10.03 barns/electron
U=PE_{Lithiophilite} x r_electron= 32.04 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Lithiophilite is Not Radioactive

Lithiophilite Classification

Dana Class:

38.1.1.2 (38)Anhydrous Phosphates, etc

(38.1)A+ B++ XO4

(38.1.1)Dana Group

38.1.1.1 Triphylite LiFePO4 Pbnm 2/m 2/m 2/m

38.1.1.2 Lithiophilite LiMnPO4 Pmnb 2/m 2/m 2/m

38.1.1.3 Natrophilite NaMnPO4 Pnam 2/m 2/m 2/m

Strunz Class:

VII/A.02-20 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 Lithiophilite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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

Lithiophilite

LiMnPO4
Dana No: 38.1.1.2 Strunz No: VII/A.02-20
Locality:

Notes: