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Borcarite

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Big Photo

Snezhnoe B Deposit, Izvestkovyi Stream, Tas-Khayakhtakh Range, Dogdo River Basin, Polar Yakutia, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia
© Pavel M. Kartashov

Show Borcarite Photos (35)



Formula:
Ca
 
4
Mg(B
 
4
O
 
6
(OH)
 
6
)(CO
 
3
)
 
2
System:TriclinicHardness:4
Name:Named in allusion to its composition, being a BORate and CARbonate.
This page provides mineralogical data about Borcarite.

Classification of Borcarite

IMA status:Approved
Strunz 8th edition ID:5/H.13-10
Nickel-Strunz 10th (pending) edition ID:6.DA.40

6 : BORATES
D : Tetraborates
A : Neso-tetraborates
Dana 8th edition ID:27.1.3.1

27 : COMPOUND BORATES
1 : Miscellaneous
Hey's CIM Ref.:10.4.3

10 : Borates with other anions
4 : Borates with carbonate
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Type Occurrence of Borcarite

Type Locality:Snezhnoe B Deposit, Izvestkovyi Stream, Tas-Khayakhtakh Range, Dogdo River Basin, Polar Yakutia, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia
Year of Discovery:1965

Physical Properties of Borcarite

Hardness (Mohs):4

Crystallography of Borcarite

Crystal System:Triclinic

Optical Data of Borcarite

Type:Biaxial (-)
RI values: nα = 1.590 nβ = 1.651 nγ = 1.657
2V:Measured: 30° , Calculated: 32°
Maximum Birefringence:δ = 0.067

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v distinct

Chemical Properties of Borcarite

Formula:
Ca
 
4
Mg(B
 
4
O
 
6
(OH)
 
6
)(CO
 
3
)
 
2
Essential elements:B, C, Ca, H, Mg, O
All elements listed in formula:B, C, Ca, H, Mg, O

Relationship of Borcarite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.DA.10Borax
Na
 
2
(B
 
4
O
 
5
)(OH)
 
4
 · 8H
 
2
O
6.DA.15Tincalconite
Na
 
2
(B
 
4
O
 
7
) · 5H
 
2
O
6.DA.20Hungchaoite
Mg(B
 
4
O
 
7
) · 9H
 
2
O
6.DA.25Fedorovskite
Ca
 
2
(Mg,Mn
2+
 
)
 
2
(B
 
4
O
 
7
)(OH)
 
6
6.DA.25Roweite
Ca
 
2
Mn
2+
2
(B
 
4
O
 
7
)(OH)
 
6
6.DA.30Hydrochlorborite
Ca
 
4
B
 
8
O
 
15
Cl
 
2
 · 21H
 
2
O
6.DA.35Uralborite
Ca
 
2
[B
 
3
O
 
3
(OH)
 
5
 · OB(OH)
 
3
]
6.DA.40Numanoite
Ca
 
4
Cu(B
 
4
O
 
6
(OH)
 
6
)(CO
 
3
)
 
2
6.DA.60Fontarnauite
(Na,K)
 
2
(Sr,Ca)B
 
4
SH
 
8
O
 
15
Related Minerals - Hey's Index Grouping:

- +
10.4.1Canavesite
Mg
 
2
(HBO
 
3
)(CO
 
3
) · 5H
 
2
O
10.4.2Carboborite
Ca
 
2
Mg[B(OH)
 
4
]
 
2
(CO
 
3
)
 
2
 · 4H
 
2
O
10.4.4Sakhaite
Ca
 
12
Mg
 
4
(BO
 
3
)
 
7
(CO
 
3
)
 
4
(OH)
 
2
Cl
10.4.5Moydite-(Y)
Y[B(OH)
 
4
](CO
 
3
)
10.4.6Gaudefroyite
Ca
 
4
Mn
3+
2-3
(BO
 
3
)
 
3
(CO
 
3
)(O,OH)
 
3

Other Names for Borcarite

Other Languages:
German:Borcarit
Japanese:硼灰石
Russian:Боркарит
Simplified Chinese:硼灰石
Spanish:Borcarita

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 Borcarite

Reference List:

- +
American Mineralogist: 50: 2097.

Mineralogical Magazine: 59: 297-304.

Soviet Physics – Doklady: 20: 799-801.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Borcarite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Borcarite details from Handbook of Mineralogy (PDF)
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    • Specimens:The following Borcarite specimens are currently listed for sale on minfind.com.
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    • Localities for Borcarite

    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.
    Hide Locality List
    (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.
    China
     
    • Inner Mongolia Autonomous Region
      • Ulanhad League (Chifeng Prefecture)
        • Hexigten Banner (Keshiketeng Co.)
          • Huanggang (Huanggangliang) Fe-Sn deposit
    		Ottens, B. and G. Neumeier (2012) The Huanggang Mine, Inner Mongolia, China. Mineralogical Record 43:529-563
    Japan
     
    • Honshu Island
      • Chugoku Region
        • Okayama Prefecture
          • Takahashi City
            • Bitchu-cho (Bicchu-cho)
    		Journal of Mineralogical and Petrological Sciences Vol. 99 (2004) , No. 2 April 67-71
    Russia
     
    • Eastern-Siberian Region
      • Saha Republic (Sakha Republic; Yakutia)
        • Polar Yakutia
          • Dogdo River Basin
            • Tas-Khayakhtakh Range
              • Izvestkovyi Stream
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    http://maurice.strahlen.org/yakutia/yakutia.htm
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