Erlianite
A valid IMA mineral species
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About Erlianite
Formula:
(Fe,Mg)4(Fe,V)2Si6O15(OH,O)8
Colour:
Black
Lustre:
Silky
Hardness:
3½
Specific Gravity:
3.11
Crystal System:
Orthorhombic
Name:
For the type locality, Harhada iron deposit along the Jining-Erlian railway.
This page provides mineralogical data about Erlianite.
Unique Identifiers
Mindat ID:
1400
Long-form identifier:
mindat:1:1:1400:3
GUID
(UUID V4):
(UUID V4):
b5f1f312-710e-4643-ad50-a42a7ae23d7a
IMA Classification of Erlianite
Classification of Erlianite
9.HC.05
9 : SILICATES (Germanates)
H : Unclassified silicates
C : With Mn, Fe
9 : SILICATES (Germanates)
H : Unclassified silicates
C : With Mn, Fe
78.5.5.1
78 : Unclassified Silicates
5 :
78 : Unclassified Silicates
5 :
14.14.6
14 : Silicates not Containing Aluminum
14 : Silicates of V and Bi
14 : Silicates not Containing Aluminum
14 : Silicates of V and Bi
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Ern | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Erlianite
Silky
Transparency:
Opaque
Colour:
Black
Streak:
Brownish
Hardness:
3½ on Mohs scale
Cleavage:
Perfect
{001} and {100}
{001} and {100}
Density:
3.11 g/cm3 (Measured) 3.11 g/cm3 (Calculated)
Optical Data of Erlianite
Type:
Biaxial (-)
RI values:
nα = 1.667 nβ = 1.674 nγ = 1.679
2V:
Measured: 56° to 59°, Calculated: 80°
Max Birefringence:
δ = 0.012
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v or r < v
Pleochroism:
Weak
Comments:
Y = Z = dark brown; X = light brown.
Comments:
Absorption: Z ≈ Y > X.
Chemistry of Erlianite
Mindat Formula:
(Fe,Mg)4(Fe,V)2Si6O15(OH,O)8
Common Impurities:
Ti,Al,Mn,Ca,K,Na,P
Crystallography of Erlianite
Crystal System:
Orthorhombic
Cell Parameters:
a = 23.2 Å, b = 9.2 Å, c = 13.18 Å
Ratio:
a:b:c = 2.522 : 1 : 1.433
Unit Cell V:
2,813.14 ų (Calculated from Unit Cell)
Comment:
space group may be Pmmn or Pm21n, but no suitable single crystal was found.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
11.5 Å | (100) |
2.89 Å | (60) |
2.61 Å | (60) |
3.05 Å | (50) |
2.52 Å | (50) |
1.560 Å | (50) |
2.42 Å | (30) |
Comments:
Harhada mine, China. Data from the type description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 5: Initiation of plate tectonics | <3.5-2.5 |
40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Type Occurrence of Erlianite
General Appearance of Type Material:
Fibres or flakes. Aggregates are lath-like, and up to 1-2 cm.
Place of Conservation of Type Material:
National Museum for Geology, Beijing, China, number M09677 (type).
Geological Setting of Type Material:
Shear planes in iron ore.
Associated Minerals at Type Locality:
Synonyms of Erlianite
Other Language Names for Erlianite
Common Associates
Related Minerals - Strunz-mindat Grouping
9.HC.10 | Bostwickite | CaMn3+6Si3O16 · 7H2O |
9.HC.15 | Allophite | Mg8Al4Si5O24 · H2O |
9.HC.20 | Almbosite | Fe2+5Fe3+4V6+4Si3O27 |
9.HC.25 | Aquacreptite (of Shepard) | Mg4Fe2Si6O19 · 8H2O with some Al2O3, or near |
9.HC.30 | Farallonite | 2MgO · W2O5 · SiO2 · nH2O? |
9.HC.35 | Hokoite | Mn2+Mn3+2SiO6 · H2O |
9.HC.40 | Polyhydrite |
Fluorescence of Erlianite
Not fluorescent.
Other Information
Thermal Behaviour:
DTA exothermal peaks at 320, 720, 940 °C.
Notes:
Soluble in dilute hydrochloric acid.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Erlianite
mindat.org URL:
https://www.mindat.org/min-1400.html
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Please feel free to link to this page.
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References for Erlianite
Localities for Erlianite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
China (TL) | |
| Feng Xiancan et al. (1986) +1 other reference |
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Harhada Mine, Wenduermiao Fe deposit, Erenhot City, Xilingol League, Inner Mongolia, China