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

Brannockite

Big Photo

Foote Lithium Co. Mine (Foote Mine), Kings Mountain District, Cleveland Co., North Carolina, USA
© JBS 2006

Show Brannockite Photos (10)
Formula:
(K,Na)Li
 
3
Sn
 
2
Si
 
12
O
 
30
System:HexagonalHardness:5 - 6
This page provides mineralogical data about Brannockite.

Classification of Brannockite

IMA status:Approved
Strunz 8th edition ID:8/E.22-140
Nickel-Strunz 10th (pending) edition ID:9.CM.05

9 : SILICATES (Germanates)
C : Cyclosilicates
M : [Si6O18]12- 6-membered double rings (sechser-Doppelringe)
Dana 8th edition ID:63.2.1a.1

63 : CYCLOSILICATES Condensed Rings
2 : Condensed Rings (Milarite - Osumilite group)
Hey's CIM Ref.:14.12.1

14 : Silicates not Containing Aluminum
12 : Silicates of Sn
mindat.org URL:http://www.mindat.org/min-755.html
Please feel free to link to this page.

Type Occurrence of Brannockite

Type Locality:Foote Lithium Co. Mine (Foote Mine), Kings Mountain District, Cleveland Co., North Carolina, USA
Year of Discovery:1973

Physical Properties of Brannockite

Hardness (Mohs):5 - 6

Crystallography of Brannockite

Crystal System:Hexagonal
Cell Parameters:a = 10.01Å, c = 14.24Å
Ratio:a:c = 1 : 1.423
Unit Cell Volume:V 1,235.69 ų (Calculated from Unit Cell)

Optical Data of Brannockite

Type:Uniaxial (-)
RI values: nω = 1.567 nε = 1.566
Maximum Birefringence:δ = 0.001

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

Chemical Properties of Brannockite

Formula:
(K,Na)Li
 
3
Sn
 
2
Si
 
12
O
 
30
Essential elements:K, Li, O, Si, Sn
All elements listed in formula:K, Li, Na, O, Si, Sn
Common Impurities:Na

Relationship of Brannockite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.CM.05Armenite
BaCa
 
2
Al
 
6
Si
 
9
O
 
30
·2H
 
2
O
9.CM.05Chayesite
K(Mg,Fe)
 
4
FeSi
 
12
O
 
30
9.CM.05Darapiosite
KNa
 
2
Li(Mn,Zn)
 
2
ZrSi
 
12
O
 
30
9.CM.05Eifelite
KNa
 
3
Mg
 
4
Si
 
12
O
 
30
9.CM.05Merrihueite
(K,Na)
 
2
(Fe,Mg)
 
5
Si
 
12
O
 
30
9.CM.05Milarite
K
 
2
Ca
 
4
Al
 
2
Be
 
4
Si
 
24
O
 
60
·H
 
2
O
9.CM.05Osumilite-(Mg)
(K,Na)(Mg,Fe)
 
2
(Al,Fe)
 
3
(Si,Al)
 
12
O
 
30
·H
 
2
O
9.CM.05Osumilite
(K,Na)(Fe
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
3
(Si,Al)
 
12
O
 
30
9.CM.05Poudretteite
KNa
 
2
B
 
3
Si
 
12
O
 
30
9.CM.05Roedderite
(Na,K)
 
2
(Mg,Fe)
 
5
Si
 
12
O
 
30
9.CM.05Sogdianite
(K,Na)
 
2
(Li,Fe)
 
3
(Zr,Ti,Fe)Si
 
12
O
 
30
9.CM.05Sugilite
KNa
 
2
(Fe,Mn,Al)
 
2
Li
 
3
Si
 
12
O
 
30
9.CM.05Yagiite
(Na,K)
 
3
Mg
 
4
(Al,Mg)
 
6
(Si,Al)
 
24
O
 
60
9.CM.05Berezanskite
KLi
 
3
Ti
 
2
Si
 
12
O
 
30
9.CM.05Dusmatovite
K(K,Na,[ ])(Mn
2+
 
,Y,Zr)
 
2
(Zn,Li)
 
3
Si
 
12
O
 
30
9.CM.05Shibkovite
K(Ca,Mn,Na)
 
2
(K
 
2-x
,□
 
x
)
 
2
Zn
 
3
Si
 
12
O
 
30
9.CM.05Almarudite
K([],Na)
 
2
(Mn
2+
 
,Fe
2+
 
,Mg)
 
2
(Be,Al)
 
3
[Si
 
12
O
 
30
]
9.CM.05Trattnerite
([],K)(Mg, Fe
2+
 
)
 
3
Fe
3+
2
[Si
 
12
O
 
30
]
9.CM.05Oftedalite
(Sc,Ca,Mn
2+
 
)
 
2
K[(Be,Al)
 
3
Si
 
12
O
 
30
]
9.CM.10Faizievite
K
 
2
Na(Ca
 
6
Na)Ti
 
4
Li
 
6
[F
 
2
|Si
 
24
O
 
66
]
Related Minerals - Hey's Index Grouping:

- +
14.12.2Malayaite
CaSn[O|SiO
 
4
]
14.12.3Stokesite
CaSn[Si
 
3
O
 
9
] · 2H
 
2
O
14.12.4Pabstite
Ba(Sn,Ti)[Si
 
3
O
 
9
]

Other Names for Brannockite

Synonyms:
IMA1972-029
Other Languages:
German:Brannockit
Russian:Бреннокит
Spanish:Brannockita

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 Brannockite

Reference List:Mineralogical Record: 4: 73-76.

American Mineralogist: 58: 1111.

American Mineralogist: 73: 595-600.

Internet Links for Brannockite

Search Engines:
  • Look for Brannockite on Google
  • Look for Brannockite images on Google
    • External Links:
  • Look for Brannockite on Webmineral
  • Look for Brannockite on Athena Mineralogy
  • Look for Brannockite on Wikipedia
  • Look for Brannockite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Brannockite in the Natural History Museum (London) online catalogue
  • Brannockite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Lapis Mineral Magazin
  • Buy RARE Minerals from Rocks of Africa
  • Buy minerals from Mineralium.com
  • Search for - Brannockite - on e-Rocks Mineral Sales & Auctions
  • Buy Minerals and Crystals from Crystalarium.com
  • Top quality minerals from Kristalle of California
  • Buy Fine Minerals from mineralsweb.com
  • SpiriferMinerals.com - high quality specimens
  • High-end worldwide specimens & outstanding customer service
  • Edwards Minerals - Fine Specimens
  • Wilensky Fine Minerals
  • Find Brannockite on www.crystalclassics.co.uk
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Brannockite

    Show Locality List (2 Items)
    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.
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    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: 16th Nov 2009 16:32:57