Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Boralsilite

Big Photo

Stornes Peninsula, Larsemann Hills (Larseman Hills), Prydz Bay, Ingrid Christensen Coast, Princess Elizabeth Land, Eastern Antarctica, Antarctica
© R.Kristiansen

Formula:
Al
 
16
B
 
6
Si
 
2
O
 
27
System:MonoclinicLustre:Vitreous
Name:Named after its composition, containing BORon, ALuminum, and SILicon.
This page provides mineralogical data about Boralsilite.

Classification of Boralsilite

IMA status:Approved
Strunz 8th edition ID:8/B.31-45
Nickel-Strunz 10th (pending) edition ID:9.BD.30

9 : SILICATES (Germanates)
B : Sorosilicates
D : Si2O7 groups, with additional anions; cations in tetrahedral [4] and greater coordination
mindat.org URL:http://www.mindat.org/min-6829.html
Please feel free to link to this page.

Type Occurrence of Boralsilite

Type Locality:Stornes Peninsula, Larsemann Hills (Larseman Hills), Prydz Bay, Ingrid Christensen Coast, Princess Elizabeth Land, Eastern Antarctica, Antarctica

Physical Properties of Boralsilite

Lustre:Vitreous

Crystallography of Boralsilite

Crystal System:Monoclinic

Optical Data of Boralsilite

Type:Biaxial (+)
RI values: nα = 1.629 nβ = 1.640 nγ = 1.654
2V:Measured: 81° , Calculated: 84°
Maximum Birefringence:δ = 0.025

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

Chemical Properties of Boralsilite

Formula:
Al
 
16
B
 
6
Si
 
2
O
 
27
Essential elements:Al, B, O, Si
All elements listed in formula:Al, B, O, Si

Relationship of Boralsilite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.BD.05Bertrandite
Be
 
4
[(OH)
 
2
|Si
 
2
O
 
7
]
9.BD.10Hemimorphite
Zn
 
4
[(OH)
 
2
|Si
 
2
O
 
7
] · H
 
2
O
9.BD.15Junitoite
CaZn
 
2
[Si
 
2
O
 
7
] · H
 
2
O
9.BD.20Axinite-(Fe)
Ca
 
2
Fe
2+
 
Al
 
2
[OH|BSi
 
4
O
 
15
]
9.BD.20Axinite-(Mg)
Ca
 
2
MgAl
 
2
[OH|BSi
 
4
O
 
15
]
9.BD.20Axinite-(Mn)
Ca
 
2
Mn
2+
 
Al
 
2
[OH|BSi
 
4
O
 
15
]
9.BD.20Tinzenite
(Ca,Mn
2+
 
,Fe
2+
 
)
 
3
Al
 
2
[OH|BSi
 
4
O
 
15
]
9.BD.25Vistepite
SnMn
 
4
B
 
2
Si
 
4
O
 
16
(OH)
 
2
9.BD.35Werdingite
(Mg,Fe)
 
2
Al
 
14
Si
 
4
B
 
4
O
 
37

Other Names for Boralsilite

Synonyms:
IMA1996-029
German names:
Boralsilit
Russian names:
Боралсилит
Spanish names:
Boralsilita

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 Boralsilite

Reference List:Edward S. Grew, Heribert A. Graetsch, Birgit Pöter, Martin G. Yates, Ian Buick, Heinz-Jürgen Bernhardt, Werner Schreyer, Günter Werding, Christopher J. Carson, and Geoffrey L. Clarke (2008) Boralsilite, Al16B6Si2O37, and “boron-mullite:” Compositional variations and associated phases in experiment and nature. American Mineralogist 93:283-299

Grew, E.S., McGee, J.J., Yates, M.G., Peacor, D.R., Rouse, R.C., Huijsmans, J.P.P., Shearer, C.K., Wiedenbeck, M., Thost, D.E., and Su, S.-C. (1998) Boralsilite (Al16B6Si2O37): A new mineral related to sillimanite from pegmatites in granulite-facies rocks. American Mineralogist: 83: 638-651.

Pöter, B., Werding, G., Schreyer, W., Bernhardt, H.-J. (1998) Synthesis and properties of the new borosilicate mineral boralsilite. Berichte Deutschen Mineral Gesell, Beiheft z European Journal of Mineralogy: 10(1): 220.

American Mineralogist (1999): 84: 1152-1161.

Internet Links for Boralsilite

Search Engines:
  • Look for Boralsilite on Google
  • Look for Boralsilite images on Google
    • External Links:
  • Look for Boralsilite on Webmineral
  • Look for Boralsilite on Athena Mineralogy
  • Look for Boralsilite on Wikipedia
  • Look for Boralsilite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Boralsilite in the Natural History Museum (London) online catalogue
    • Mineral Dealers:
  • Search for - Boralsilite - on e-Rocks Mineral Sales & Auctions
  • Fine Minerals from Dan Weinrich Minerals
  • High-end worldwide specimens & outstanding customer service
  • Buy Minerals and Crystals from Crystalarium.com
  • rare and unusual minerals mainly crystallized
  • Search for Boralsilite at Thames Valley Minerals
  • Search for Boralsilite on minvision.com
  • Buy from David K Joyce minerals
  • Wright's Rock Shop - excellent mineral specimens since 1970
  • Fabre Minerals - search for Boralsilite specimens
  • Wendel Minerals - Auktion & Shop
  • Rare and Unusual minerals at Mineralogical Research Company
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to find out how you can sponsor this page.

    Localities for Boralsilite

    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.
    These maps work faster with Firefox!
    (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.
    Antarctica
     
    • Eastern Antarctica
      • Princess Elizabeth Land
        • Ingrid Christensen Coast
          • Prydz Bay
            • Larsemann Hills (Larseman Hills)
    		Amer.Min. (1998) 83, 638-651
    Norway
     
    • Rogaland
      • Lund
        • Flatestøl
    		[AmMin. (1998) 83, 638-651; AmMin 84:993]
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. 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.