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Leifite

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Leif Ericson
Formula:
(Na,H2O)Na6[Be2Al2(Al,Si)Si15O39]F2
Colour:
Colorless
Lustre:
Silky
Hardness:
6
Specific Gravity:
2.57
Crystal System:
Trigonal
Member of:
Name:
Named after Leif Ericson (Old Norse: Leifr Eiríksson) (ca. 970 – ca. 1020) who was a Norse explorer regarded as the first European to land in North America (excluding Greenland), nearly 500 years before Christopher Columbus.
Leifite Group.
The sodium analogue of Telyushenkoite and Eirikite.

Note on the formula: the minor water content is located on a specific site ("B" site), not on the Na site ("A" site).


Hide all sections | Show all sections

Classification of LeifiteHide

Approved, 'Grandfathered' (first described prior to 1959)
9.EH.25

9 : SILICATES (Germanates)
E : Phyllosilicates
H : Transitional structures between phyllosilicate and other silicate units
78.7.10.1

78 : Unclassified Silicates
7 :
17.2.3

17 : Silicates Containing other Anions
2 : Silicates with fluoride

Physical Properties of LeifiteHide

Silky
Transparency:
Transparent, Translucent
Colour:
Colorless
Hardness:
Tenacity:
Brittle
Cleavage:
Distinct/Good
Distinct on {1010}
Fracture:
Irregular/Uneven, Splintery
Density:
2.57 g/cm3 (Measured)    2.59 g/cm3 (Calculated)

Optical Data of LeifiteHide

Type:
Uniaxial (+)
RI values:
nω = 1.511 - 1.518 nε = 1.522 - 15.220
Max Birefringence:
δ = 0.011
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of LeifiteHide

Formula:
(Na,H2O)Na6[Be2Al2(Al,Si)Si15O39]F2
IMA Formula:
Na7Be2(Si15Al3)O39(F,OH)2
Common Impurities:
Ti,Fe,Mn,Zn,Mg,K,H2O

Crystallography of LeifiteHide

Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
P3m1
Cell Parameters:
a = 14.352(2) Å, c = 4.852(3) Å
Ratio:
a:c = 1 : 0.338
Unit Cell V:
865.52 ų (Calculated from Unit Cell)
Z:
3
Morphology:
Hexagonal prisms, acicular, striated to 3cm.

Type Occurrence of LeifiteHide

Other Language Names for LeifiteHide

German:Leifit
Russian:Лейфит
Simplified Chinese:白针柱石
Spanish:Leifita
Traditional Chinese:白針柱石

Relationship of Leifite to other SpeciesHide

Member of:
Other Members of this group:
EirikiteKNa6Be2(Si15Al3)O39F2Trig. 3m (3 2/m) : P3m1
Telyushenkoite(Cs,Na,K)Na6[F2|Be2Al3Si15O39]Trig. 3m (3 2/m) : P3 1m

Common AssociatesHide

Associated Minerals Based on Photo Data:
Serandite19 photos of Leifite associated with Serandite on mindat.org.
Albite18 photos of Leifite associated with Albite on mindat.org.
Rhodochrosite17 photos of Leifite associated with Rhodochrosite on mindat.org.
Aegirine16 photos of Leifite associated with Aegirine on mindat.org.
Elpidite9 photos of Leifite associated with Elpidite on mindat.org.
Polylithionite5 photos of Leifite associated with Polylithionite on mindat.org.
Tainiolite4 photos of Leifite associated with Tainiolite on mindat.org.
Eirikite2 photos of Leifite associated with Eirikite on mindat.org.
Siderite2 photos of Leifite associated with Siderite on mindat.org.
Ancylite1 photo of Leifite associated with Ancylite 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.25Telyushenkoite(Cs,Na,K)Na6[F2|Be2Al3Si15O39]Trig. 3m (3 2/m) : P3 1m
9.EH.25EirikiteKNa6Be2(Si15Al3)O39F2Trig. 3m (3 2/m) : P3m1
9.EH.30NafertisiteNa3Fe2+10Ti2(Si6O17)2O2(OH)6F(H2O)2Mon. 2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.2.1TopazAl2(SiO4)(F,OH)2Orth. mmm (2/m 2/m 2/m)
17.2.2PolylithioniteKLi2Al(Si4O10)(F,OH)2Mon. 2/m : B2/b
17.2.5Meliphanite(Ca,Na)2(Be,Al)[Si2O6(OH,F)]Tet. 4 : I4
17.2.6SarcoliteNa4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl)Tet.
17.2.7GötzeniteNaCa6Ti(Si2O7)2OF3Tric. 1 : P1
17.2.8Kuliokite-(Y)Y4Al(SiO4)2(OH)2F5
17.2.9ZinnwalditeKLiFe2+Al(AlSi3O10)(F,OH)2Mon.
17.2.10MagbasiteKBaFe3+Mg7Si8O22(OH)2F6Orth. mmm (2/m 2/m 2/m) : Cmma

Other InformationHide

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 LeifiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
BØGGILD, O.B. (1915): Leifit et nyt mineral fra Narsarsuk. Meddelelser om Grønland 51, 427-433. (in Danish) English abstract: Mineralogical Abstracts 1, (19) (1915) 123.
BØGGILD, O.B. (1920): Leifit, ein neues Mineral von Narsarsuk, Grönland. Zeitschrift für Krystallographie 55, 425-429 (in German).
BØGGILD, O.B. (1953): The Mineralogy of Greenland. C.A. Reitzels Forlag, Copenhagen, 439 p.
CODA, A., UNGARETTI, L. & DELLA GIUSTA, A. (1974): The crystal structure of leifite, Na6[Si16Al2(BeOH)2O39]·1.5H2O. Acta Crystallographica B30(2), 396-401.
HORVÁTH, L. & GAULT, R.A. (1990): The mineralogy of Mont Saint Hilaire. Mineralogical Record 21, 284-359.
PETERSEN, O.V., RØNSBO, J.G., LEONARDSEN, E.S., JOHNSEN, O. BOLLINGBERG, H. & ROSE HANSEN, J. (1994): Leifite from the Ilímaussaq alkaline complex, South Greenland. Neues Jahrbuch für Mineralogie, Monatshefte Jg. 1993, 254-258.
LARSEN, A.O. & ÅSHEIM, A. (1995): Leifite* from a nepheline syenite pegmatite on Vesle Arøya in the Langesundsjord District, Oslo Region, Norway. Norsk Geologisk Tidsskift 75, 243-246. [* this turned out to be the type eirikite]
HOCHLEITNER, R., WEISS, S. & HORVÁTH, L. (2000): Steckbrief: Leifit. Lapis 25(7/8), 9-11 (in German).
SOKOLOVA, E., HUMINICKI, D.M.C., HAWTHORNE, F.C., AGAKHANOV, A.A., PAUTOV, L.A. & GREW, E.S. (2002): The crystal chemisty of telyushenkoite and leifite, ANa6[Be2Al3Si15O39F2], A = Cs, Na. Canadian Mineralogist 40, 183-192.
YAKOVENCHUK, V.N., IVANYUK, G.YU., PAKHOMOVSKY, YA.A. & MEN’SHIKOV, YU.P. (2005): Khibiny. Published by Laplandia Minerals, Apatity. 255.
American Mineralogist (1972): 57: 1006.

Internet Links for LeifiteHide

Localities for LeifiteHide

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
        • Mont Saint-Hilaire
Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359., AmMin 57:1006(1971)
  • Québec & Newfoundland and Labrador
Canadian Mineralogist Vol. 34, pp.349-371 (1996); A. Kerr and H. Rafuse (2012) Rare-earth element (REE) geochemistry of the Strange Lake deposits: Implications for resource estimation and metallogenic models. Newfoundland and Labrador Department of Natural Resources Current Research 2012 pp39-60; BIRKETT, T.C., MILLER, R.R., ROBERTS, A.C., & MARIANO, A.N. (1992) Zirconium bearing minerals from the Strange Lake intrusive complex, Quebec Labrador. Canadian Mineralogist, 30, 191-205.
Greenland (TL)
 
  • Kujalleq
    • Narsaq
      • Igaliku (Igaliko)
        • Narsaarsuk Plateau
Meddr Gronland,(1915) 51, p. 429; Petersen, O.V., Rønsbo, J.G., Leonardsen, E.S, Johnsen, O, Bollingberg, H. & Rose-Hansen, J. (1994): Leifite from the Ilímaussaq alkaline complex, South Greenland. Contribution to the mineralogy of Ilímaussaq, no. 90. Neues Jahrbuch für Mineralogie, Monatshefte, 1994 (2), 83-90
Petersen, O.V. (2001): List of all minerals identified in the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin. 190, 25-33
        • Tunulliarfik Fjord (Tunugdliarfik)
Petersen, O.V., Rønsbo, J.G., Leonardsen, E.S, Johnsen, O, Bollingberg, H. & Rose-Hansen, J. (1994): Leifite from the Ilímaussaq alkaline complex, South Greenland. Contribution to the mineralogy of Ilímaussaq, no. 90. Neues Jahrbuch für Mineralogie, Monatshefte, 1994 (2), 83-90
Norway
 
  • Vestfold
    • Larvik
      • Langesundsfjorden
        • Vesle Arøya
Engvoldsen, T., Andersen, F., Berge, S. A. & Burvald, I. (1991): Pegmatittmineraler fra Larvik ringkompleks. STEIN 18 (1), 15-71
Russia
 
  • Northern Region
    • Murmanskaya Oblast'
      • Khibiny Massif
[World of Stones 95:5-6, p64]
          • Astrophyllite Stream
Pekov et al (2005) New Data on Minerals Vol 40 pp11-16
Arzamastsev, A., Yakovenchuk, V., Pakhomovsky, Y., & Ivanyuk, G. (2008). The Khibina and Lovozero alkaline massifs: Geology and unique mineralization. In Guidbook for 33rd International Geological Congress Excursion (No. 47, p. 58).
Pekov, I.V. & Podlesnyi, A.S. (2004): Kukisvumchorr Deposit: Mineralogy of Alkaline Pegmatites and Hydrotermalites. Mineralogical Almanac, vol. 7, 140 pages + xxiv photo's pages
      • Lovozero Massif
        • Alluaiv Mt
          • Umbozero mine (Umbozerskii mine; Umba Mine)
Pekov, I.V. (2000): Lovozero Massif. Moscow, Ocean Pictures Ltd, 480 pp.
[World of Stones 95:5-6, p64]; Arzamastsev, A., Yakovenchuk, V., Pakhomovsky, Y., & Ivanyuk, G. (2008). The Khibina and Lovozero alkaline massifs: Geology and unique mineralization. In Guidbook for 33rd International Geological Congress Excursion (No. 47, p. 58).
P.M. Kartashov data; New Data on Minerals M., 2004 Vol 39 pp 5-13; Pekov, I. V., Chukanov, N. V., Yamnova, N. A., Zadov, A. E., & Tarassoff, P. (2007). Gjerdingenite-Na and gjerdingenite-Ca, two new mineral species of the labuntsovite group. The Canadian Mineralogist, 45(3), 529-539
[World of Stones 95:5-6, p64]
Mineral and/or Locality  
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