Barringtonite
Valid as an unnamed mineral
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About Barringtonite
Formula:
MgCO3 · 2H2O
Crystal System:
Triclinic
Name:
Named for Barrington Tops, type locality.
Originally reported from Rainbow Falls, Semphill Creek, Barrington Tops, Gloucester Co., New South Wales, Australia.
Unique Identifiers
Mindat ID:
538
Long-form identifier:
mindat:1:1:538:4
Similar Names
| Farringtonite | A valid IMA mineral species | Mg3(PO4)2 |
| Harringtonite | A synonym of Mesolite | |
| Warringtonite | A synonym of Brochantite |
IMA Classification of Barringtonite
IMA status notes:
Unnamed (probably valid)
Approval history:
Unnamed, but probably valid.
Classification of Barringtonite
5.CA.15
5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
A : With medium-sized cations
5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
A : With medium-sized cations
15.1.5.1
15 : HYDRATED NORMAL CARBONATES
1 : A(XO3)·xH2O
15 : HYDRATED NORMAL CARBONATES
1 : A(XO3)·xH2O
11.3.2
11 : Carbonates
3 : Carbonates of Mg
11 : Carbonates
3 : Carbonates of Mg
Optical Data of Barringtonite
Type:
Biaxial (+)
RI values:
nα = 1.458 nβ = 1.473 nγ = 1.501
2V:
Measured: 73° , Calculated: 74°
Max. Birefringence:
δ = 0.043
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
none
Chemistry of Barringtonite
Mindat Formula:
MgCO3 · 2H2O
Element Weights:
Elements listed:
Crystallography of Barringtonite
Crystal System:
Triclinic
Cell Parameters:
a = 9.15 Å, b = 6.2 Å, c = 6.09 Å
α = 94°, β = 95.5°, γ = 108.7°
α = 94°, β = 95.5°, γ = 108.7°
Ratio:
a:b:c = 1.476 : 1 : 0.982
Unit Cell V:
323.89 ų (Calculated from Unit Cell)
Other Language Names for Barringtonite
Common Associates
Associations Based on Photo Data:
| 3 photos of Barringtonite associated with Lansfordite | MgCO3 · 5H2O |
Related Minerals - Strunz-mindat Grouping
| 5.CA.05 | Nesquehonite | MgCO3 · 3H2O |
| 5.CA.10 | Lansfordite | MgCO3 · 5H2O |
| 5.CA.20 | Hellyerite | NiCO3 · 5.5H2O |
Other Information
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 Barringtonite
mindat.org URL:
https://www.mindat.org/min-538.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Barringtonite
Localities for Barringtonite
Showing 2 localities.
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
Australia | |
| Mineralogical Magazine 1965 34 : 370-372 |
Greece | |
| Kolitsch et al. (2014) |
Maricopa County, Arizona, USA