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Barringtonite

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Formula:
MgCO
 
3
 · 2H
 
2
O
System:Triclinic
Name:Named for Barrington Tops, type locality.


Originally reported from Rainbow Falls, Semphill Creek, Barrington Tops, Gloucester Co., New South Wales, Australia.

Classification of Barringtonite

IMA status:Published without Approval 1965
Strunz 8th edition ID:5/D.01-10
Nickel-Strunz 10th (pending) edition ID:5.CA.15

5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
A : With medium-sized cations
Dana 8th edition ID:15.1.5.1

15 : HYDRATED NORMAL CARBONATES
1 : A(XO3)·xH2O
Hey's CIM Ref.:11.3.2

11 : Carbonates
3 : Carbonates of Mg
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Crystallography of Barringtonite

Crystal System:Triclinic
Cell Parameters:a = 9.15Å, b = 6.2Å, c = 6.09Å
α = 94°, β = 95.5°, γ = 108.7°
Ratio:a:b:c = 1.476 : 1 : 0.982
Unit Cell Volume:V 323.89 ų (Calculated from Unit Cell)

Optical Data of Barringtonite

Type:Biaxial (+)
RI values: nα = 1.458 nβ = 1.473 nγ = 1.501
2V:Measured: 73° , Calculated: 74°
Maximum Birefringence:δ = 0.043

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:none

Chemical Properties of Barringtonite

Formula:
MgCO
 
3
 · 2H
 
2
O
Essential elements:C, H, Mg, O
All elements listed in formula:C, H, Mg, O

Relationship of Barringtonite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.CA.05Nesquehonite
MgCO
 
3
 · 3H
 
2
O
5.CA.10Lansfordite
MgCO
 
3
 · 5H
 
2
O
5.CA.20Hellyerite
NiCO
 
3
 · 6H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
11.3.1Magnesite
MgCO
 
3
11.3.3Nesquehonite
MgCO
 
3
 · 3H
 
2
O
11.3.4Lansfordite
MgCO
 
3
 · 5H
 
2
O
11.3.5Pokrovskite
Mg
 
2
(CO
 
3
)(OH)
 
2
11.3.6Artinite
Mg
 
2
(CO
 
3
)(OH)
 
2
 · 3H
 
2
O
11.3.7Hydromagnesite
Mg
 
5
(CO
 
3
)
 
4
(OH)
 
2
 · 4H
 
2
O
11.3.8Giorgiosite
Mg
 
5
(CO
 
3
)
 
4
(OH)
 
2
 · 5-6H
 
2
O
11.3.9Dypingite
Mg
 
5
(CO
 
3
)
 
4
(OH)
 
2
 · 5H
 
2
O
11.3.10Eitelite
Na
 
2
Mg(CO
 
3
)
 
2
11.3.11Mcguinnessite
(Mg,Cu)
 
2
(CO
 
3
)(OH)
 
2

Other Names for Barringtonite

Other Languages:
German:Barringtonit
Spanish:Barringtonita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Barringtonite

Reference List:

- +
American Mineralogist: 50: 2103.

Mineralogical Magazine: 34: 370-372.

Internet Links for Barringtonite

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    • Localities for Barringtonite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • New South Wales
      • Gloucester Co.
        • Barrington Tops
          • Semphill Creek
    		Mineralogical Magazine 1965 34 : 370-372
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