Barkevikite
A discredited species name
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About Barkevikite
An obsolete name for a dark amphibole originally described by Brøgger (1887, 1890) from the nepheline syenite pegmatites in the Langesundsfjord area = Larvik Plutonic Complex.
The composition of the black amphiboles in the Langesundsfjorden area, labelled as "barkevikite" in the litterature corresponds to several species within the range ferroedenite-hastingsite-magnesiohastingsite, depending on and varying from locality to locality.
"Barkevikite" from its "type locality", Barkevik area (probably Skudesundskjærene) in the eastern part of the Langesundsfjord, is ferro-edenite (Larsen 1995, Larsen 1998).
The composition of the black amphiboles in the Langesundsfjorden area, labelled as "barkevikite" in the litterature corresponds to several species within the range ferroedenite-hastingsite-magnesiohastingsite, depending on and varying from locality to locality.
"Barkevikite" from its "type locality", Barkevik area (probably Skudesundskjærene) in the eastern part of the Langesundsfjord, is ferro-edenite (Larsen 1995, Larsen 1998).
Unique Identifiers
Mindat ID:
5385
Long-form identifier:
mindat:1:1:5385:9
IMA Classification of Barkevikite
Discredited
Approval history:
Discredited by IMA as a valid mineral name, considered as a "ferroan pargasitic hornblende" or "ferro-pargasitic hornblende" (Leake 1978).
Pronunciation of Barkevikite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Chemical Analysis
Oxide wt%:
| 1 | |
|---|---|
| SiO2 | 42,48 % |
| TiO2 | 2,90 % |
| Al2O3 | 8,58 % |
| Fe2O3 | 6,81 % |
| FeO | 15,62 % |
| MnO | 0,39 % |
| MgO | 2,78 % |
| CaO | 13,45 % |
| Na2O | 6,32 % |
| K2O | 0,60 % |
| H2O | 0,25 % |
| Total: | 94 % |
Synonyms of Barkevikite
Other Language Names for Barkevikite
Common Associates
Associations Based on Photo Data:
| 2 photos of Barkevikite associated with Wöhlerite | Na2Ca4ZrNb(Si2O7)2O3F |
| 2 photos of Barkevikite associated with Microcline | K(AlSi3O8) |
| 2 photos of Barkevikite associated with 'Syenite' | |
| 2 photos of Barkevikite associated with Ferro-hornblende | ◻Ca2(Fe2+4Al)(Si7Al)O22(OH)2 |
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.
Barkevikite in petrology
An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.
Internet Links for Barkevikite
mindat.org URL:
https://www.mindat.org/min-5385.html
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References for Barkevikite
Reference List:
Brögger, W. C. (1887) Forelöbig meddelelse om mineralerne på de sydnorske augit- og nefelinsyeniters grovkornige gange. Geologiska Föreningen i Stockholm Förhandlingar, 9 (4) 247-274 doi:10.1080/11035898709444657
Scott, Alexander (1914) Barkevikite from Lugar, Ayrshire. Mineralogical Magazine and Journal of the Mineralogical Society, 17 (80) 138-142 doi:10.1180/minmag.1914.017.80.04
Wilkinson, J. F. G. (1961) Some aspects of the calciferous amphiboles, oxyhornblende, kaersutite and barkevikite. American Mineralogist, 46 (3-4) 340-354
Larsen, Alf Olav (1995) Identiteten til de sorte amfibolene fra Oslo-feltets syenittpegmatittganger [The Identity of the Black Amphiboles of the Syenite Pegmatites of the Oslo Region]. Norsk Bergverksmuseum Skrift, 9. 27-34
Localities for Barkevikite
Showing 76 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Barkevikstranda, Barkevika, Barkevik area, Larvik Commune, Vestfold, Norway