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Fabianite

Formula:
CaB
 
3
O
 
5
OH
System:MonoclinicColour:Colourless
Hardness:6
Name:For Hans Joachim Fabian.
This page provides mineralogical data about Fabianite.

Classification of Fabianite

IMA status:Approved
Strunz 8th edition ID:5/K.01-10
Nickel-Strunz 10th (pending) edition ID:6.FC.20

6 : BORATES
F : Hexaborates
C : Phyllo-hexaborates
Dana 8th edition ID:25.3.3.1

25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
3 : Triborates
Hey's CIM Ref.:9.3.3

9 : Borates
3 : Borates of Ca and Sr
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Type Occurrence of Fabianite

Type Locality:Rehden, Diepholz, Lower Saxony, Germany
Year of Discovery:1962

Physical Properties of Fabianite

Colour:Colourless
Hardness (Mohs):6

Crystallography of Fabianite

Crystal System:Monoclinic
Cell Parameters:a = 6.59Å, b = 10.44Å, c = 6.36Å
β = 113.38°
Ratio:a:b:c = 0.631 : 1 : 0.609
Unit Cell Volume:V 401.64 ų (Calculated from Unit Cell)

Optical Data of Fabianite

Type:Biaxial (-)
RI values: nα = 1.609 nβ = 1.638 nγ = 1.650
Maximum Birefringence:δ = 0.041

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

Chemical Properties of Fabianite

Formula:
CaB
 
3
O
 
5
OH
Essential elements:B, Ca, H, O
All elements listed in formula:B, Ca, H, O

Relationship of Fabianite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.FC.05Tunellite
SrB
 
6
O
 
9
(OH)
 
2
·3H
 
2
O
6.FC.05Nobleite
CaB
 
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
Related Minerals - Hey's Index Grouping:

- +
9.3.1Calciborite
Ca[B
 
2
O
 
4
]
9.3.2Sibirskite
Ca
 
2
[(OH)(B
 
2
O
 
4
(OH))]
9.3.4Uralborite
Ca
 
2
[B
 
3
O
 
3
(OH)
 
5
·OB(OH)
 
3
]
9.3.5Vimsite
CaB
 
2
O
 
2
(OH)
 
4
9.3.6Olshanskyite
Ca
 
3
[OH|{B(OH)
 
4
}
 
2
]
 
2
9.3.7Frolovite
Ca[B(OH)
 
4
]
 
2
9.3.8Korzhinskite
CaB
 
2
O
 
4
·H
 
2
O
9.3.9Tyretskite
Ca
 
2
B
 
5
O
 
9
OH·H
 
2
O
9.3.10Nifontovite
CaB
 
2
O
 
4
·2.3H
 
2
O
9.3.12Inyoite
Ca(H
 
4
B
 
3
O
 
7
)(OH) · 4H
 
2
O
9.3.13Gowerite
Ca[B
 
5
O
 
8
(OH)][B(OH)
 
3
]·3H
 
2
O
9.3.14Colemanite
Ca[B
 
3
O
 
4
(OH)
 
3
] · H
 
2
O
9.3.15Pentahydroborite
CaB
 
2
O(OH)
 
6
 · 2H
 
2
O
9.3.16Hexahydroborite
Ca[B(OH)
 
4
]
 
2
 · 6H
 
2
O
9.3.17Meyerhofferite
Ca
 
2
(H
 
3
B
 
3
O
 
7
)
 
2
 · 4H
 
2
O
9.3.18Priceite
Ca
 
2
B
 
5
O
 
7
(OH)
 
5
·H
 
2
O
9.3.19Ginorite
Ca
 
2
B
 
14
O
 
23
·8H
 
2
O
9.3.20Probertite
NaCaB
 
5
O
 
7
(OH)
 
4
·3H
 
2
O
9.3.21Ulexite
NaCa[B
 
5
O
 
6
(OH)
 
6
] · 5H
 
2
O
9.3.22Hydroboracite
CaMg[B
 
3
O
 
4
(OH)
 
3
]
 
2
 · 3H
 
2
O
9.3.23Inderborite
CaMg(H
 
3
B
 
3
O
 
7
)
 
2
 · 8H
 
2
O
9.3.24Wardsmithite
Ca
 
5
Mg[B
 
4
O
 
7
]
 
6
 · 30H
 
2
O
9.3.25Henmilite
Ca
 
2
Cu(OH)
 
4
|[B(OH)
 
4
]
 
2
9.3.26Strontioborite
SrB
 
8
O
 
11
(OH)
 
4
9.3.27Veatchite
Sr
 
2
B
 
11
O
 
16
(OH)
 
5
·H
 
2
O
9.3.28Veatchite-A
Sr
 
2
B
 
11
O
 
16
(OH)
 
5
·H
 
2
O
9.3.29 P-Veatchite
9.3.30 Balavinskite
Sr
 
2
B
 
6
O
 
11
·4H
 
2
O
9.3.31Tunellite
SrB
 
6
O
 
9
(OH)
 
2
·3H
 
2
O
9.3.32Strontioginorite
(Sr,Ca)
 
2
B
 
14
O
 
23
·8H
 
2
O

Other Names for Fabianite

Other Languages:
German:Fabianit
Russian:Фабианит
Spanish:Fabianita

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 Fabianite

Reference List:American Mineralogist (1963): 48: 212.

Zeitschrift für Kristallographie: 132: 241-252.

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

Internet Links for Fabianite

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

    (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.
    Germany
     
    • Lower Saxony
      • Diepholz
    		A. Wittern: "Mineralfundorte in Deutschland", Schweizerbart (Stuttgart), 2001, 23
    Mineral and/or Locality
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