Donate now to keep mindat.org alive!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 Mindat
What is a mineral?The most common minerals on earthMineral PhotographyThe Elements and their MineralsGeological TimeMineral Evolution
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Eirikite

This page is currently not sponsored. Click here to sponsor this page.
Eric the Red (Eiríkur rauði)
Formula:
KNa6Be2(Si15Al3)O39F2
Colour:
White to colorless
Lustre:
Vitreous, Silky
Hardness:
6
Specific Gravity:
2.59
Crystal System:
Trigonal
Member of:
Name:
Named after Eirik Raude (950-1003), discoverer of Greenland and father of Leiv (Leif) Eiriksson, after whom leifite is named.
Leifite Group.
The K analogue of leifite and telyushenkoite.


Hide all sections | Show all sections

Classification of EirikiteHide

Approved
Approval Year:
2007
9.EH.25

9 : SILICATES (Germanates)
E : Phyllosilicates
H : Transitional structures between phyllosilicate and other silicate units
76.2.11.3

76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species

Physical Properties of EirikiteHide

Vitreous, Silky
Colour:
White to colorless
Streak:
White
Hardness:
Tenacity:
Brittle
Cleavage:
Distinct/Good
{1010}
Fracture:
Irregular/Uneven, Conchoidal
Density:
2.59(1) g/cm3 (Measured)    2.577 g/cm3 (Calculated)

Optical Data of EirikiteHide

Type:
Uniaxial (+)
RI values:
nω = 1.517() nε = 1.521(1)
Max Birefringence:
δ = 0.004
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Pleochroism:
Non-pleochroic

Chemical Properties of EirikiteHide

Formula:
KNa6Be2(Si15Al3)O39F2

Crystallography of EirikiteHide

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
P3m1
Setting:
P3m1
Cell Parameters:
a = 14.3865(9) Å, c = 4.8733(4) Å
Ratio:
a:c = 1 : 0.339
Unit Cell V:
873.50 ų (Calculated from Unit Cell)
Z:
1

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.710 (29)
4.153 (21)
3.386 (70)
3.161 (100)
3.115 (17)
2.466 (31)
2.398 (19)
2.217 (20)

Type Occurrence of EirikiteHide

General Appearance of Type Material:
finely or coarsely fibrous, monomineralic aggregates up to several centimetres across
Place of Conservation of Type Material:
Department of Geology, Natural History Museum, University of Oslo (catalogue no. 41773).
Geological Setting of Type Material:
A nepheline-syenite pegmatite
Associated Minerals at Type Locality:

Synonyms of EirikiteHide

Relationship of Eirikite to other SpeciesHide

Member of:
Other Members of this group:
Leifite(Na,H2O)Na6[Be2Al2(Al,Si)Si15O39]F2Trig. 3m : P3m1
Telyushenkoite(Cs,Na,K)Na6[F2|Be2Al3Si15O39]Trig. 3m (3 2/m) : P3 1m

Common AssociatesHide

Associated Minerals Based on Photo Data:
Leifite2 photos of Eirikite associated with Leifite on mindat.org.
Microcline2 photos of Eirikite associated with Microcline on mindat.org.
Natrolite1 photo of Eirikite associated with Natrolite on mindat.org.
Aegirine1 photo of Eirikite associated with Aegirine on mindat.org.
Rhodochrosite1 photo of Eirikite associated with Rhodochrosite on mindat.org.
Gaidonnayite1 photo of Eirikite associated with Gaidonnayite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.EH.05ManganoneptuniteNa2KLiMn2+2Ti2Si8O24Mon.
9.EH.05NeptuniteNa2KLiFe2+2Ti2Si8O24Mon. m : Bb
9.EH.05WatatsumiiteNa2KLi(Mn2+,Fe2+)2V4+2[Si8O24]Mon.
9.EH.05MagnesioneptuniteKNa2Li(Mg,Fe)2Ti2Si8O24Mon. 2/m : B2/b
9.EH.10GrumantiteNa(HSi2O5) · H2OOrth. mm2 : Fdd2
9.EH.15SarcoliteNa4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)Tet.
9.EH.20UssingiteNa2AlSi3O8OHTric. 1 : P1
9.EH.25Leifite(Na,H2O)Na6[Be2Al2(Al,Si)Si15O39]F2Trig. 3m : P3m1
9.EH.25Telyushenkoite(Cs,Na,K)Na6[F2|Be2Al3Si15O39]Trig. 3m (3 2/m) : P3 1m
9.EH.30NafertisiteNa3Fe2+10Ti2(Si6O17)2O2(OH)6F(H2O)2Mon. 2/m

Fluorescence of EirikiteHide

Other InformationHide

Notes:
insoluble in warm 6 M HCl, melts relatively easily using a gas torch, leaving a white, vesicular globule
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 EirikiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Larsen, A.O., Kolitsch, U., Gault, R.A., Giester, G. (2010): Eirikite, a new mineral species of the leifite group from the Langesundsfjord district, Norway. European Journal of Mineralogy, 22, 875-880.
Armstrong, J.A., Friis, H., Lieb, A., Finch, A.A., Weller, M.T. (2010): Combined single-crystal X-ray and neutron powder diffraction structure analysis exemplified through full structure determinations of framework and layer beryllate minerals. American Mineralogist, 95, 519-526. [refinement of Na-bearing leifite]
Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 pp [p 112-113]
HORVÁTH, L. (2009) Bertrandite, eirikite and a review of beryllium minerals from Mont Saint-Hilaire. MICRONEWS, 43(5), 9-12.

Internet Links for EirikiteHide

Localities for EirikiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
LARSEN, A.O., KOLITSCH, U., GAULT, R.A. and GIESTER,G. (2010) Eirikite, a new mineral species of the leifite group from the Langesundsfjord district, Norway. European Journal of Mineralogy, 22, 875-880. Can. Museum of Nature & Horváth collections;
HORVÁTH, L. (2009) Bertrandite, eirikite and a review of beryllium minerals from Mont Saint-Hilaire. MICRONEWS, 43(5), 9-12.
Norway (TL)
 
  • Vestfold
    • Larvik
      • Langesundsfjorden
        • Vesle Arøya
Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 p: Larsen, A.O., Kolitsch, U., Gault, R.A. & Giester, G. (2010): Eirikite a new mineral species of the leifite group from the Langesundsfjord district, Norway. European Journal of Mineralogy. 22, 875–880
Russia
 
  • Northern Region
    • Murmanskaya Oblast'
      • Lovozero Massif
        • Alluaiv Mt
          • Umbozero mine (Umbozerskii mine; Umba Mine)
Pavel M. Kartashov data
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 1993-2018, 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: January 16, 2018 19:18:48 Page generated: January 16, 2018 04:11:15
Go to top of page