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Carboborite

Formula:
Ca
 
2
Mg[CO
 
3
|B(OH)
 
4
]
 
2
 · 4H
 
2
O
System:MonoclinicHardness:2
This page provides mineralogical data about Carboborite.

Classification of Carboborite

IMA status:Approved
Strunz 8th edition ID:5/G.10-30
Nickel-Strunz 10th (pending) edition ID:6.AC.50

6 : BORATES
A : Monoborates
C : B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc
Dana 8th edition ID:27.1.1.1

27 : COMPOUND BORATES
1 : Miscellaneous
Hey's CIM Ref.:10.4.2

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

Type Locality:Qinghai plateau (Chinghai plateau), Tibet Autonomous Region, China
Year of Discovery:1964

Physical Properties of Carboborite

Hardness (Mohs):2

Crystallography of Carboborite

Crystal System:Monoclinic
Cell Parameters:a = 18.59Å, b = 6.68Å, c = 11.32Å
β = 91.68°
Ratio:a:b:c = 2.783 : 1 : 1.695
Unit Cell Volume:V 1,405.13 ų (Calculated from Unit Cell)

Optical Data of Carboborite

Type:Biaxial (-)
RI values: nα = 1.507 nβ = 1.546 nγ = 1.569
Maximum Birefringence:δ = 0.062

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

Chemical Properties of Carboborite

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

Relationship of Carboborite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.AC.05Sinhalite
MgAl[BO
 
4
]
6.AC.10Pseudosinhalite
Mg
 
2
Al
 
3
[O
 
3
|OH|(BO
 
3
)
 
2
]
6.AC.15Behierite
(Ta
5+
 
,Nb
5+
 
)[BO
 
4
]
6.AC.15Schiavinatoite
(Nb,Ta)BO
 
4
6.AC.20Frolovite
Ca[B(OH)
 
4
]
 
2
6.AC.25Hexahydroborite
Ca[B(OH)
 
4
]
 
2
 · 6H
 
2
O
6.AC.30Henmilite
Ca
 
2
Cu(OH)
 
4
|[B(OH)
 
4
]
 
2
6.AC.35Bandylite
Cu[Cl|B(OH)
 
4
]
6.AC.40Teepleite
Na
 
2
[Cl|B(OH)
 
4
]
6.AC.45Moydite-(Y)
Y[CO
 
3
|B(OH)
 
4
]
6.AC.55Sulfoborite
Mg
 
3
[(OH,F)
 
2
|SO
 
4
|{B(OH)
 
4
}
 
2
]
6.AC.60Lüneburgite
Mg
 
3
B
 
2
(PO
 
4
)
 
2
(OH)
 
6
·6H
 
2
O
6.AC.65Seamanite
Mn
2+
3
[(OH)
 
2
|PO
 
4
|B(OH)
 
4
]
6.AC.70Cahnite
Ca
 
2
[AsO
 
4
|B(OH)
 
4
]
Related Minerals - Hey's Index Grouping:

- +
10.4.1Canavesite
Mg
 
2
[CO
 
3
|HBO
 
3
] · 5H
 
2
O
10.4.3Borcarite
Ca
 
4
Mg[(CO
 
3
)
 
2
|B
 
4
O
 
6
(OH)
 
6
]
10.4.4Sakhaite
Ca
 
12
Mg
 
4
[Cl|(OH)
 
2
|(CO
 
3
)
 
4
|(BO
 
3
)
 
7
]
10.4.5Moydite-(Y)
Y[CO
 
3
|B(OH)
 
4
]
10.4.6Gaudefroyite
Ca
 
4
Mn
3+
2-3
[(O,OH)
 
3
|CO
 
3
|(BO
 
3
)
 
3
]

Other Names for Carboborite

Other Languages:
German:Carboborit
Russian:Карбоборит
Spanish:Carboborita

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 Carboborite

Reference List:Hsieh Hsien-Te, Chien Tze-Chiang, and Liu Lai-Pao (1964): New mineral - Carboborite, MgCa2(CO3)(B2O5) x 10H2O. Scientia Sinica 13(5), 813-821 (in Russian). - American Mineralogist (1965), 50, 262 (abstract).

Bulletin de Mineralogie 104, 578-581.

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

Internet Links for Carboborite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Carboborite in the Natural History Museum (London) online catalogue
  • Carboborite details from Handbook of Mineralogy (PDF)
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    Localities for Carboborite

    (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
     
    • Tibet Autonomous Region
    		Hsieh Hsien-Te, Chien Tze-Chiang, and Liu Lai-Pao (1964): Scientia Sinica 13(5), 813-821 (in Russian).
    USA
     
    • California
      • Inyo Co.
    		USGS
    Mineral and/or Locality
    Google
     
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 17th Nov 2009 20:31:23