Erlianite Mineral Data

General Erlianite Information

Chemical Formula:

(Fe++,Mg)4(Fe+++,V+++)2[Si6O15](O,OH)8

Composition:

Molecular Weight = 861.42 gm

Magnesium 1.41 % Mg 2.34 % MgO

Vanadium 2.96 % V 4.35 % V₂O₃

Iron 32.42 % Fe 29.19 % FeO / 13.90 % Fe₂O₃

Silicon 19.56 % Si 41.85 % SiO₂

Hydrogen 0.94 % H 8.37 % H₂O

Oxygen 42.72 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺_3.5Mg_0.5Fe³⁺_1.5V³⁺_0.5Si₆O₁₅(OH)₈

IMA Status:

Approved IMA 1985

Locality:

Harhada iron deposit, near the Jining-Erlian railway, Inner Mongolia, China. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Erlianite + Pronunciation

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Erlianite Crystallography

Axial Ratios:

a:b:c =2.5217:1:1.4326

Cell Dimensions:

a = 23.2, b = 9.2, c = 13.18, Z = 6; V = 2,813.14 Den(Calc)= 3.05

Crystal System:

OrthorhombicSpace Group: Pmmn,Pm21

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

By Intensity(I/I_o): 11.5(1), 2.61(0.6), 2.89(0.6),

Physical Properties of Erlianite

Cleavage:

{001} Perfect, {100} Perfect

Color:

Black.

Density:

3.11

Diaphaneity:

Nearly opaque

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

3.5 - Copper Penny

Luster:

Silky

Streak:

brown

Optical Properties of Erlianite

Gladstone-Dale:

CI meas= 0.063 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.044 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2208,KPDmeas= 0.2165,KC= 0.231
Ncalc = 1.7 - 1.72

Optical Data:

Biaxial (-), a=1.667, b=1.674, g=1.679, bire=0.0120, 2V(Calc)=80, 2V(Meas)=56-59.

Calculated Properties of Erlianite

Electron Density:

Bulk Density (Electron Density)=3.00 gm/cc
note: Specific Gravity of Erlianite =3.05 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Erlianite= 10.95 barns/electron
U=PE_Erlianite x rElectron Density= 32.85 barns/cc.

Radioactivity:

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

Erlianite Classification

Dana Class:

78.05.05.01 (78)Unclassified silicates

(78.05)possible phyllosilicates

(78.05.05)Dana Group

78.05.05.01 Erlianite (Fe,Mg)4(Fe,V)2[Si6O15](O,OH)8 Pmmn,Pm21 Ortho

Strunz Class:

09.HC.05 09 - SILICATES (Germanates)

09.H - Unclassified Silicates

09.HC -With Mn, Fe

09.HC.05 Erlianite (Fe,Mg)4(Fe,V)2[Si6O15](O,OH)8 Pmmn,Pm21 Ortho

Other Erlianite Information

References:

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

See Also:

Links to other databases for Erlianite :
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

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

Erlianite

(Fe++,Mg)4(Fe+++,V+++)2[Si6O15](O,OH)8
Dana No: 78.05.05.01 Strunz No: 09.HC.05
Locality:

Notes: