Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportAdd Glossary Item
StatisticsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Knasibfite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
K3Na4[SiF6]3[BF4]
System:
Orthorhombic
Colour:
colourless
Name:
Named for its chemical composition (K, Na, Si, B, F).
This page provides mineralogical data about Knasibfite.

Classification of Knasibfite

Approved 2006
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

Associated Minerals at Type Locality:

Physical Properties of Knasibfite

Colour:
colourless
Density:
2.75(1) g/cm3 (Measured)    2.77 g/cm3 (Calculated)

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 Data:
d-spacingIntensity
8.55 (50)
8.10 (25)
4.724 (25)
4.043 (100)
3.175 (30)
2.281 (50)
2.095 (25)
1.795 (25)

Optical Data of Knasibfite

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

Chemical Properties of Knasibfite

Formula:
K3Na4[SiF6]3[BF4]
All elements listed in formula:

Relationship of Knasibfite to other Species

3.CH.05MalladriteNa2[SiF6]
3.CH.10Bararite(NH4)2[SiF6]
3.CH.15Cryptohalite(NH4)2[SiF6]
3.CH.15HieratiteK2[SiF6]
3.CH.20DemartiniteK2[SiF6]

Other Names for Knasibfite

Name in Other Languages:
Simplified Chinese:氟硼硅钾钠石

Other Information

Health Risks:
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.

Internet Links for Knasibfite

Localities for Knasibfite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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 (TL)
 
  • Sicily
    • Messina Province
      • Eolie Islands (Aeolian Islands)
        • Lipari
          • Vulcano Island
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.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2015, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: July 3, 2015 11:51:14 Page generated: June 29, 2015 11:03:53