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Barentsite

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Willem Barents
Formula:
Na7Al(HCO3)2(CO3)2F4
Colour:
Colourless
Lustre:
Vitreous, Pearly, Dull
Hardness:
3
Specific Gravity:
2.56
Crystal System:
Triclinic
Name:
Named after Willem Barents (1550–1597), the famous Dutch seafarer, for whom the Barents Sea, northeast of the Kola Peninsula, was named.
Alters superficially to a white powder in air. Slowly decomposed by water.



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Classification of BarentsiteHide

Approved
5.BB.05

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
B : With alkalies, etc.
13.1.8.1

13 : ACID CARBONATES
1 : Miscellaneous
12.1.2

12 : Carbonates with other anions
1 : Carbonates with halides

Physical Properties of BarentsiteHide

Vitreous, Pearly, Dull
Transparency:
Transparent
Comment:
Pearly on cleavages, dull if weathered
Colour:
Colourless
Hardness:
Hardness:
VHN100=86 - 172 - Vickers
Tenacity:
Brittle
Cleavage:
Perfect
on {001}{110}
Density:
2.56 g/cm3 (Measured)    2.55 g/cm3 (Calculated)

Optical Data of BarentsiteHide

Type:
Biaxial (-)
RI values:
nα = 1.358 nβ = 1.479 nγ = 1.530
2V:
Measured: 62° , Calculated: 60°
Max Birefringence:
δ = 0.172
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v weak

Chemical Properties of BarentsiteHide

Formula:
Na7Al(HCO3)2(CO3)2F4
IMA Formula:
Na7Al(CO3)2(HCO3)2F4

Crystallography of BarentsiteHide

Crystal System:
Triclinic
Cell Parameters:
a = 6.472 Å, b = 6.735 Å, c = 8.806 Å
α = 92.5°, β = 97.33°, γ = 119.32°
Ratio:
a:b:c = 0.961 : 1 : 1.307
Unit Cell V:
329.43 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Granular to 5mm.

Type Occurrence of BarentsiteHide

Synonyms of BarentsiteHide

Other Language Names for BarentsiteHide

Related Minerals - Nickel-Strunz GroupingHide

5.BB.10DawsoniteNaAlCO3(OH)2Orth. mmm (2/m 2/m 2/m) : Imma
5.BB.15TunisiteNaCa2Al4(CO3)4(OH)8ClTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
5.BB.20SabinaiteNa4Zr2TiO4(CO3)4Mon. 2/m : B2/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

12.1.1NorthupiteNa3Mg(CO3)2ClIso. m3 (2/m 3) : Fd3
12.1.3RouvilleiteNa3(Ca,Mn,Fe)2(CO3)3FMon. 2/m : B2/b
12.1.4ChlormagaluminiteMg4Al2(OH)12Cl2 · 3H2OHex.
12.1.5DeferniteCa6(CO3)2-x(SiO4)x(OH)7(Cl,OH)1-2x (x<0.5)Orth. mmm (2/m 2/m 2/m) : Pnma
12.1.6BrenkiteCa2(CO3)F2Orth.
12.1.7Stenonite(Sr,Ba,Na)2Al(CO3)F5Mon. 2/m
12.1.8Bastnäsite-(Ce)Ce(CO3)FHex. 6 m2 : P6c2
12.1.9Bastnäsite-(La)La(CO3)FHex.
12.1.10Bastnäsite-(Y)Y(CO3)FHex. 6 m2 : P62c
12.1.11Parisite-(Ce)CaCe2(CO3)3F2Mon. m : Bb
12.1.12Parisite-(Nd)Ca(Nd,Ce,La)2(CO3)3F2
12.1.13Synchysite-(Ce)CaCe(CO3)2FMon. 2/m : B2/b
12.1.14Synchysite-(Y)CaY(CO3)2FMon. 2/m : B2/b
12.1.15Synchysite-(Nd)CaNd(CO3)2F
12.1.16Röntgenite-(Ce)Ca2(Ce,La)3(CO3)5F3Trig. 3 : R3
12.1.17Cordylite-(Ce)NaBaCe2(CO3)4F Hex.
12.1.19Huanghoite-(Ce)BaCe(CO3)2FTrig. 3m (3 2/m) : R3m
12.1.20Zhonghuacerite-(Ce)Ba2Ce(CO3)3FTrig.
12.1.21Cebaite-(Ce)Ba3Ce2(CO3)5F2
12.1.22ThorbastnäsiteThCa(CO3)2F2 · 3H2O
12.1.23PhosgenitePb2CO3Cl2Tet. 4/mmm (4/m 2/m 2/m) : P4/mbm
12.1.24BarstowitePb4Cl6(CO3) · H2OMon. 2/m : P21/m
12.1.25AlbrechtschraufiteCa4Mg(UO2)2(CO3)6F2 · 17-18H2OTric. 1 : P1
12.1.26KettneriteCaBiCO3OFOrth. mmm (2/m 2/m 2/m)

Other InformationHide

Special Storage/
Display Requirements:
Alters to a white powder in air, slowly decomposed by water.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for BarentsiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist: 69: 565.
Doklady Akademii Nauk SSSR: 273: 699-704.

Internet Links for BarentsiteHide

Localities for BarentsiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
 
  • Northern Region
    • Murmanskaya Oblast'
      • Khibiny Massif
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality  
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