Simferite Mineral Data

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General Simferite Information

Chemical Formula:

Li(Mg,Fe+++,Mn+++)2(PO4)2

Composition:

Molecular Weight = 276.67 gm

Lithium 2.51 % Li 5.40 % Li₂O

Magnesium 8.78 % Mg 14.57 % MgO

Manganese 7.94 % Mn 11.41 % Mn₂O₃

Iron 12.11 % Fe 17.32 % Fe₂O₃

Phosphorus 22.39 % P 51.30 % P₂O₅

Oxygen 46.26 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

LiMgFe³⁺_0.6Mn³⁺_0.4(PO₄)₂

Environment:

Occurs at the contact of REE-bearing pegmatite and phlogopitized tremolitic rock.

IMA Status:

Approved IMA 1999

Locality:

Radionovskoye pegmatite field, middle Berda River, Zaporozhe district, Ukraine. Link to MinDat.org Location Data.

Name Origin:

Name is derived from the Greek for "hospitable," in allusion to the fact that four (non-P) cations enter its structure.

Name Pronunciation:

Simferite + Pronunciation

Synonym:

ICSD 71764

IMA1989-016

PDF 81-424

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Simferite Crystallography

Axial Ratios:

a:b:c =0.4699:1:0.584

Cell Dimensions:

a = 4.747, b = 10.101, c = 5.8992, Z = 2; V = 282.86 Den(Calc)= 3.25

Crystal System:

OrthorhombicSpace Group: Pbnm or Pbn21

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.48(1)(131), 4.3(0.9)(110), 2.93(0.8)(002),1.01(0.6), 2.23(0.6)(140), 2.42(0.6)(112), 3.45(0.6)(120),

Crystal Structure:

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Yakubovich O V , Bairakov V V , Simonov M A , Doklady Akademii Nauk SSSR , 307 (1989) p.1119-1122, Crystal structure of simferite Li(Mg,Fe3+,Mn3+)2[PO4]2

Physical Properties of Simferite

Cleavage:

{010} Distinct, {100} Poor

Color:

Dark red.

Density:

3.22 - 3.27, Average = 3.24

Diaphaneity:

Transparent

Fracture:

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

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Hardness:

5 - Apatite

Luster:

Vitreous - Resinous

Streak:

brown

Optical Properties of Simferite

Gladstone-Dale:

CI meas= 0.045 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.046 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2179,KPDmeas= 0.2183,KC= 0.2285
Ncalc = 1.74 - 1.75

Optical Data:

Biaxial (?), a=1.69-1.704, b=1.702-1.716, g=1.712-1.726, bire=0.0220, 2V(Calc)=84, 2V(Meas)=-60. Dispersion strong, r > v.

Pleochroism (x):

light brown or brownish red.

Pleochroism (y):

brownish yellow or brown.

Pleochroism (z):

yellow or reddish yellow.

Calculated Properties of Simferite

Electron Density:

Bulk Density (Electron Density)=3.16 gm/cc
note: Specific Gravity of Simferite =3.25 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Simferite= 6.94 barns/electron
U=PE_Simferite x rElectron Density= 21.90 barns/cc.

Radioactivity:

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

Simferite Classification

Dana Class:

38.05.07.01 (38)Anhydrous Phosphates, etc

(38.05)with miscellaneous formulae

(38.05.07)Dana Group

38.05.07.01 Simferite Li(Mg,Fe,Mn)2(PO4)2 Pbnm or Pbn21 Ortho

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 Simferite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,v78,p452, v91, p1205) OPTIC PROP.(Am.Min.,Vol.78,p452,1993)

See Also:

Links to other databases for Simferite :
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 - WWW-MINCRYST

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Simferite

Li(Mg,Fe+++,Mn+++)2(PO4)2
Dana No: 38.05.07.01 Strunz No: 08.AB.10
Locality:

Notes: