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Nobleite

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Corkscrew mine, Corkscrew Canyon, Furnace Creek District, Death Valley, Inyo Co., California, USA
© Caltech

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Formula:
CaB
 
6
O
 
9
(OH)
 
2
·3H
 
2
O
System:MonoclinicLustre:Vitreous
Hardness:3
This page provides mineralogical data about Nobleite.

Classification of Nobleite

IMA status:Approved
Strunz 8th edition ID:5/K.06-10
Nickel-Strunz 10th (pending) edition ID:6.FC.05

6 : BORATES
F : Hexaborates
C : Phyllo-hexaborates
Dana 8th edition ID:26.6.6.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
6 : Hexaborates
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Type Occurrence of Nobleite

Type Locality:De Bely mine, Death Valley, Inyo Co., California, USA
Year of Discovery:1961

Physical Properties of Nobleite

Lustre:Vitreous
Hardness (Mohs):3

Crystallography of Nobleite

Crystal System:Monoclinic
Cell Parameters:a = 14.56Å, b = 8.01Å, c = 9.83Å
β = 111.75°
Ratio:a:b:c = 1.818 : 1 : 1.227
Unit Cell Volume:V 1,064.81 ų (Calculated from Unit Cell)

Optical Data of Nobleite

Type:Biaxial (+)
RI values: nα = 1.500 nβ = 1.520 nγ = 1.554
2V:Measured: 76° , Calculated: 78°
Maximum Birefringence:δ = 0.054

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:relatively weak

Chemical Properties of Nobleite

Formula:
CaB
 
6
O
 
9
(OH)
 
2
·3H
 
2
O
Essential elements:B, Ca, H, O
All elements listed in formula:B, Ca, H, O

Relationship of Nobleite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.FC.05Tunellite
SrB
 
6
O
 
9
(OH)
 
2
·3H
 
2
O
6.FC.10Strontioborite
SrB
 
8
O
 
11
(OH)
 
4
6.FC.15Ginorite
Ca
 
2
B
 
14
O
 
23
·8H
 
2
O
6.FC.15Strontioginorite
(Sr,Ca)
 
2
B
 
14
O
 
23
·8H
 
2
O
6.FC.20Fabianite
CaB
 
3
O
 
5
OH

Other Names for Nobleite

Synonyms:
Nobelite
Other Languages:
German:Nobleit
Russian:Ноблеит
Spanish:Nobleita

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 Nobleite

Reference List:American Mineralogist (1961): 46: 560-571.

Canadian Mineralogist (1994): 32: 895-902.

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

Karanović, L., Rosić, A., Poleti, D. (2004): Crystal structure of nobleite, Ca[B6O9(OH)2]3H2O, from Jarandol (Serbia). European Journal of Mineralogy, 16, 824-832.

Articles/Blogs about Nobleite

Internet Links for Nobleite

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    Localities for Nobleite

    Hide Locality List
    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.
    Argentina
     
    • Salta
      • Sijes
    		Rock Currier collection
    Chile
     
    • Antofagasta Region
    		MinMag 66:253
    USA
     
    • California
      • Inyo Co.
        • Death Valley
          • Furnace Creek District
            • Black Mts
    		www.mineralsocal.org
    American Mineralogist (1979): 64(3-4): 369-375.
    Am Min 64:3-4 pp 369-375
            • Corkscrew Canyon
    		www.mineralsocal.org
    Mineral and/or Locality
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