Mindat Logo

Knasibfite

Formula:
K
 
3
Na
 
4
[SiF
 
6
]
 
3
[BF
 
4
]
System:OrthorhombicColour:colourless
This page provides mineralogical data about Knasibfite.

Classification of Knasibfite

IMA status:Approved 2006
Nickel-Strunz 10th (pending) edition ID:3.CH.25

3 : HALIDES
C : Complex halides
H : Silicofluorides
mindat.org URL:http://www.mindat.org/min-31406.html
Please feel free to link to this page.

Type Occurrence of Knasibfite

Type Locality:La Fossa Crater, Vulcano Island, Eolie Islands (Aeolian Islands), Lipari, Messina Province, Sicily, Italy
Associated Minerals at type locality:
HieratiteDemartiniteAvogadrite

Physical Properties of Knasibfite

Colour:colourless
Density (measured):2.75(1) g/cm3
Density (calculated):2.77 g/cm3

Crystallography of Knasibfite

Crystal System:Orthorhombic
Class (H-M):mm2 - Pyramidal
Space Group:Imm2
Cell Parameters:a = 5.522Å, b = 17.106Å, c = 9.175Å
Ratio:a:b:c = 0.323 : 1 : 0.536
Unit Cell Volume:V 866.7 ų
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
8.55 (50)
8.10 (25)
4.724 (25)
4.043 (100)
3.175 (30)
2.281 (50)
2.095 (25)

Optical Data of Knasibfite

Type:Isotropic
RI values: nα = 1.320(1)
Maximum Birefringence:δ = 1.320 - Isotropic minerals have no birefringence
Surface Relief:Moderate

Chemical Properties of Knasibfite

Formula:
K
 
3
Na
 
4
[SiF
 
6
]
 
3
[BF
 
4
]
All elements listed in formula:B, F, K, Na, Si

Relationship of Knasibfite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
3.CH.05Malladrite
Na
 
2
[SiF
 
6
]
3.CH.10Bararite
(NH
 
4
)
 
2
[SiF
 
6
]
3.CH.15Cryptohalite
(NH
 
4
)
 
2
[SiF
 
6
]
3.CH.15Hieratite
K
 
2
[SiF
 
6
]
3.CH.20Demartinite
K
 
2
[SiF
 
6
]

Other Names for Knasibfite

Synonyms:
IMA2006-042
Other Languages:

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 Knasibfite

Reference List:F.Demartin, C.M.Gramaccioli, I. Campostrini & P.Orlandi (2008), Knasibfite, a new hexafluorosilicate from La Fossa crater, Vulcano, Aeolian Islands, Italy, Canadian Mineralogist 46, 447-453.

Articles/Blogs about Knasibfite

Internet Links for Knasibfite

Search Engines:
  • Look for Knasibfite on Google
  • Look for Knasibfite images on Google
  • External Links:
  • Look for Knasibfite on Webmineral
  • Look for Knasibfite on Athena Mineralogy
  • Look for Knasibfite on Wikipedia
  • Look for Knasibfite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Knasibfite in the Natural History Museum (London) online catalogue
  • Mineral Dealers:
  • Find Knasibfite on www.crystalclassics.co.uk
  • High-end worldwide specimens & outstanding customer service
  • Fabre Minerals - search for Knasibfite specimens
  • Buy fine minerals and gemstones from Pala International
  • Buy Minerals and Crystals from Crystalarium.com
  • Buy Fine Minerals from mineralsweb.com
  • Top quality minerals from Kristalle of California
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • rare and unusual minerals mainly crystallized
  • Search for Knasibfite on minvision.com
  • The Arkenstone - Fine Minerals
  • Wendel Minerals - Auktion & Shop
  • Jobs:
  • Mining & Geology Jobs
  • Page Sponsor

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

    Localities for Knasibfite

    (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
    IMA website - Proposals approved in January 2007; Italo Campostrini list - 2008
    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.