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Metaborite

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Big Photo

Chelkar salt dome, Aksai Valley, Aktobe Province (Aqtöbe Oblysy; Aktubinskaya Oblast'), Kazakhstan
© Pavel M. Kartashov

Show Metaborite Photos (8)



Formula:
HBO
 
2
System:IsometricColour:Colourless, brownish
Lustre:VitreousHardness:5


Dimorph of clinometaborite.

Classification of Metaborite

IMA status:Approved
Strunz 8th edition ID:5/L.01-10
Nickel-Strunz 10th (pending) edition ID:6.GD.10

6 : BORATES
G : Heptaborates and other megaborates
D : Mega-tektoborates
Dana 8th edition ID:24.5.1.1

24 : ANHYDROUS BORATES
5 : Miscellaneous
Hey's CIM Ref.:9.1.2

9 : Borates
1 : Borates of the alkalis and boric acid
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Type Occurrence of Metaborite

Type Locality:Chelkar salt dome, Aksai Valley, Aktobe Province (Aqtöbe Oblysy; Aktubinskaya Oblast'), Kazakhstan
Year of Discovery:1964

Physical Properties of Metaborite

Lustre:Vitreous
Colour:Colourless, brownish
Hardness (Mohs):5

Crystallography of Metaborite

Crystal System:Isometric
Cell Parameters:a = 8.88Å
Unit Cell Volume:V 700.23 ų (Calculated from Unit Cell)

Optical Data of Metaborite

Type:Isotropic

Chemical Properties of Metaborite

Formula:
HBO
 
2
Essential elements:B, H, O
All elements listed in formula:B, H, O

Relationship of Metaborite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.GD.05Pringleite
Ca
 
9
B
 
26
O
 
34
(OH)
 
24
Cl
 
4
 · 13H
 
2
O
6.GD.05Ruitenbergite
Ca
 
9
B
 
26
O
 
34
(OH)
 
24
Cl
 
4
 · 13H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
9.1.1Sassolite
H
 
3
BO
 
3
9.1.3Diomignite
Li
 
2
[B
 
4
O
 
7
]
9.1.4Biringuccite
Na
 
2
B
 
5
O
 
8
(OH) · H
 
2
O
9.1.5Nasinite
Na
 
4
B
 
10
O
 
17
 · 5H
 
2
O
9.1.6Kernite
Na
 
2
[B
 
4
O
 
6
(OH)
 
2
] · 3H
 
2
O
9.1.7Ezcurrite
Na
 
4
B
 
10
O
 
17
 · 7H
 
2
O
9.1.8Tincalconite
Na
 
2
(B
 
4
O
 
7
) · 5H
 
2
O
9.1.9Borax
Na
 
2
(B
 
4
O
 
5
)(OH)
 
4
 · 8H
 
2
O
9.1.10Ameghinite
Na(H
 
4
B
 
3
O
 
7
)
9.1.11Sborgite
Na[B
 
5
O
 
6
(OH)
 
4
] · 3H
 
2
O
9.1.12Aristarainite
Na
 
2
MgB
 
12
O
 
20
 · 8H
 
2
O
9.1.13Santite
K[B
 
5
O
 
6
(OH)
 
4
] · 2H
 
2
O
9.1.14Larderellite
(NH
 
4
)B
 
5
O
 
6
(OH)
 
4
9.1.15Ammonioborite
(NH
 
4
)
 
2
[B
 
5
O
 
6
(OH)
 
4
]
 
2
 · H
 
2
O
9.1.16Rhodizite
(K,Cs)Al
 
4
Be
 
4
(B,Be)
 
12
O
 
28

Other Names for Metaborite

Other Languages:
German:Metaborit
Simplified Chinese:偏硼石
Spanish:Metaborita

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 Metaborite

Reference List:

- +
American Mineralogist (1965): 50: 261-262.

Acta Crystallographica: 16: 380-384.

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

Internet Links for Metaborite

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  • Raman and XRD data at RRUFF project
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  • Metaborite details from Handbook of Mineralogy (PDF)
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    • Localities for Metaborite

    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.
    Italy
     
    • Sicily
      • Messina Province
        • Lipari
          • Eolie Islands (Aeolian Islands)
            • Vulcano Island
    		Campostrini I. et al - Vulcano: ein aussergewohnlicher Fundpunkt von neuen und seltenen Mineralien - MineralienWelt 2010 - nr.3 - p.40-57
    Kazakhstan
     
    • Aktobe Province (Aqtöbe Oblysy; Aktubinskaya Oblast')
      • Aksai Valley
    		American Mineralogist (1965): 50: 261-262.; Handbook of Mineralogy Vol V p 6; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Russia
     
    • Eastern-Siberian Region
      • Prebaikalia (Pribaikal'e)
        • Irkutskaya Oblast'
          • Zheleznogorsk
    		Mazurov, M.P., Grishina, S.N., Istomin, V.E., and Titov, A.T. (2007): Geology of Ore Deposits 49(4), 271-284.; Mazurov et al (2007) Geology of Ore Deposits, 49, 271–284.
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