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6 - 6½
Crystal System:
Named from the Greek leucos (λευκός) meaning white, and sphenos (σφηνώ) meaning wedge, in allusion to its color and crystal habit.
This page provides mineralogical data about Leucosphenite.

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Classification of LeucospheniteHide

Approved, 'Grandfathered' (first described prior to 1959)

9 : SILICATES (Germanates)
D : Inosilicates
P : Transitional ino-phyllosilicate structures

72 : PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
5 : Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with corrugated and complex layers

17 : Silicates Containing other Anions
5 : Borosilicates

Physical Properties of LeucospheniteHide

6 - 6½ on Mohs scale

Optical Data of LeucospheniteHide

Biaxial (+)
RI values:
nα = 1.643 - 1.649 nβ = 1.657 - 1.664 nγ = 1.681 - 1.691
Measured: 77° , Calculated: 76°
Max Birefringence:
δ = 0.038 - 0.042
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of LeucospheniteHide

IMA Formula:
Common Impurities:

Crystallography of LeucospheniteHide

Crystal System:
Cell Parameters:
a = 9.81 Å, b = 16.85 Å, c = 7.21 Å
β = 93.35°
a:b:c = 0.582 : 1 : 0.428
Unit Cell V:
1,189.77 ų (Calculated from Unit Cell)

Crystallographic forms of LeucospheniteHide

Crystal Atlas:
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Leucosphenite no.1 - Goldschmidt (1913-1926)
Leucosphenite no.2 - Goldschmidt (1913-1926)
Leucosphenite no.5 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by

Edge Lines | Miller Indicies | Axes

Opaque | Translucent | Transparent

Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation

Type Occurrence of LeucospheniteHide

Synonyms of LeucospheniteHide

Other Language Names for LeucospheniteHide

Simplified Chinese:淡钡钛石
Traditional Chinese:淡鋇鈦石

Common AssociatesHide

Associated Minerals Based on Photo Data:
Manganoneptunite8 photos of Leucosphenite associated with Manganoneptunite on
Microcline8 photos of Leucosphenite associated with Microcline on
Lomonosovite7 photos of Leucosphenite associated with Lomonosovite on
Aegirine7 photos of Leucosphenite associated with Aegirine on
Raite5 photos of Leucosphenite associated with Raite on
Narsarsukite4 photos of Leucosphenite associated with Narsarsukite on
Zorite4 photos of Leucosphenite associated with Zorite on
Vinogradovite3 photos of Leucosphenite associated with Vinogradovite on
Natrolite2 photos of Leucosphenite associated with Natrolite on
Petersenite-(Ce)2 photos of Leucosphenite associated with Petersenite-(Ce) on

Related Minerals - Nickel-Strunz GroupingHide

9.DP.05Meliphanite(Ca,Na)2(Be,Al)[Si2O6(OH,F)]Tet. 4 : I4
9.DP.20PrehniteCa2Al2Si3O10(OH)2Orth. mm2
9.DP.25AmstalliteCaAl(Si,Al)4O8(OH)4 · (H2O,Cl)Mon. 2/m : B2/b
9.DP.35Lemoynite(Na,K)2CaZr2Si10O26 · 5H2OMon. 2/m : B2/b
9.DP.35NatrolemoyniteNa4Zr2Si10O26•9H2OMon. 2/m : B2/m

Related Minerals - Dana Grouping (8th Ed.)Hide,La)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17,Ce)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17 mmm (2/m 2/m 2/m)

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.5.3SearlesiteNa(H2BSi2O7)Mon. 2 : P21
17.5.5ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.8PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
17.5.9LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.10DatoliteCa(HBSiO5)Mon. 2/m : P21/b
17.5.11DanburiteCaB2Si2O8Orth. mmm (2/m 2/m 2/m)
17.5.12HowliteCa2B5SiO9(OH)5Mon. 2/m : P21/b
17.5.13BakeriteCa4(H5B5Si3O20)Mon. 2/m : P21/b
17.5.14OyeliteCa10Si8B2O29 · 12.5H2OOrth.
17.5.15KornerupineMg3Al6(Si,Al,B)5O21(OH)Orth. mmm (2/m 2/m 2/m)
17.5.16HarkeriteCa12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2OTrig. 3m (3 2/m) : R3m
17.5.17SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]Tric. 1 : P1
17.5.24Cappelenite-(Y)Ba(Y,Ce)6Si3B6O24F2Trig. 3 : P3
17.5.25Dumortierite(Al,Fe3+)7(SiO4)3(BO3)O3Orth. mmm (2/m 2/m 2/m)
17.5.26Holtite(Ta0.60.4)Al6BSi3O18(O,OH)2.25Orth. mmm (2/m 2/m 2/m) : Pnma
17.5.27DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.28 FerridraviteNaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3O
17.5.30Uvite SeriesCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)Trig. 3m : R3m
17.5.32TienshaniteKNa3Na6Ca2Ba6Mn6(Ti4+,Nb)6B12Si36O114(O,OH,F)11Hex. 6/m : P6/m
17.5.34TaramelliteBa4(Fe3+,Ti,Fe2+,Mg)4(B2Si8O27)O2ClxOrth. mmm (2/m 2/m 2/m) : Pmmn
17.5.36NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2ClOrth. mmm (2/m 2/m 2/m) : Pmmn
17.5.40Axinite-(Mn)Ca2Mn2+Al2BSi4O15(OH)Tric. 1 : P1
17.5.44SchorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.45Fluor-buergeriteNa(Fe3+3)Al6(Si6O18)(BO3)3O3FTrig. 3m : R3m
17.5.46FeruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.47Axinite-(Fe)Ca2Fe2+Al2BSi4O15OHTric. 1 : P1
17.5.49Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2Orth. mmm (2/m 2/m 2/m)
17.5.50Hyalotekite(Pb,Ba,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28(F,Cl)Tric. 1 : P1
17.5.51Hellandite-(Y)(Ca,REE)4Y2Al◻2(B4Si4O22) (OH)2Mon.

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 LeucospheniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Flink, G. (1898) Berättelse om en mineralogisk resa I Syd-Grönland sommaren 1897. Meddelelser om Grønland: 14: 221-262.
Flink, G. (1901) On the minerals from Narsarsuk on the Firth of Tunugdliarfik in Southern Greenland. 28. Leucosphenite, Meddelelser om Grønland: 24: 137-146.
Milton, C., Axelrod, J.M., Grimaldi, F.S. (1955) New minerals, reedmergnerite (Na2O·B2O3·6SiO2) and eitelite (Na2O·MgO·2CO2) associated with leucosphenite, shortite, searlesite, and crocidolite in the Green River formation, Utah. American Mineralogist: 40: 326-327.
Shumyatskaya, N.G., Voronkov, A.A., Belov, N.V. (1971) X-ray diffraction study of leucosphenite. Soviet Physics - Crystallography: 16: 416-422.
Chao, G.Y., Watkinson, D.H. (1972) Leucosphenite from Mont St. Hilaire, Quebec. The Canadian Mineralogist: 11: 851-860.
Pabst, A., Milton, C. (1972) Leucosphenite, and its occurrence in the Green River Formation of Utah and Wyoming. American Mineralogist: 57: 1801-1822.
Malinovskii, Y.A., Yamnova, N.A., Belov, N.V. (1981) The refined crystal structure of the leucosphenite. Doklady Akademii Nauk SSSR: 257: 1128-1132.
Horváth, L., Gault, R.G. (1990) The mineralogy of Mont Saint Hilaire. Mineralogical Record: 21: 284 359.
Shannon, R.D., Shannon, R.C., Medenbach, O., Fischer, R.X. (2002) Refractive index and dispersion of flourides and oxides. Journal of Physical and Chemical Reference Data: 31: 931-970.

Internet Links for LeucospheniteHide

Localities for LeucospheniteHide

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.
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Chao, G.Y. and Watkinson, D.H. (1972), Leucosphenite from Mont St.-Hilaire, Quebec, Canadian Mineralogist: 11: 851-860.
Greenland (TL)
  • Kujalleq
    • Narsaq
      • Igaliku (Igaliko)
        • Narsaarsuk Plateau
Meddr Gronland,(1899) 24, p. 137; Bøgghild, O.B. (1953): The Mineralogy of Greenland. Meddelelser om Grønland, Bd. 149. Nr. 3., C.A. Reitzels Forlag, Copenhagen. 445 p. (p.264-265)
  • Honshu Island
    • Chubu Region
      • Niigata Prefecture
        • Itoigawa City
          • Ohmi
Alfredo Petrov collection
Yamada, S. (2004) Nihonsan-koubutsu Gojuon-hairetsu Sanchi-ichiranhyou (111 pp.)
  • Eastern-Siberian Region
    • Sakha Republic (Saha Republic; Yakutia)
      • Aldan Shield
        • Aldan
          • Inagli Massif
N.V. Chukanov et al.: Zap. Vses. Mineral. Obshch. 133(1):59-72 (2004)
        • Chara and Tokko Rivers Confluence
KONEV, A.A., VOROBYEV, E.I. & BULAKH, A. (1993): Charoite – der Schmuckstein aus Sibirien und seine seltenen Begleiminerale. Lapis 18(4), 13-20 (In German).
  • Northern Region
    • Murmanskaya Oblast'
Yakovenchuk, V. N., Ivanyuk, G., Pakhomovsky, Y. & Men'shikov, Y. (2005): Khibiny. Apatity & London (Laplandia Minerals in association with the Mineral. Soc. of GB & Ireland), 468 pp.
      • Lovozero Massif
        • Karnasurt Mt
Mineralogical Record (2000): 31: 203.; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
  • Region of Republican Subordination
    • Tien Shan Mtn
      • Alai Range (Alayskiy)
Agakhanov, A.A., Pautov, L.A., Uvarova, Y.A., Sokolova, E.V., Hawthorne, F.C., Karpenko, V.Yu. (2005): Senkevichite, CsKNaCa2TiO[Si7O18(OH)], a new mineral. New Data on Minerals, 40, 11-16; Pautov L.A., Agakhanov A.A., Sokolova E.V., Hawthorne F., Karpenko V.Yu. (2011) Byzantievite, Ba5(Ca,REE,Y)22(Ti,Nb)18(SiO4)4[(PO4),(SiO4)]4(BO3)9O21[(OH),F]43(H2O)1.5, a new mineral. New Data on Minerals 46:5-12; Agakhanov A.A., Pautov L.A., Karpenko V.Yu., Bekenova G.K., Uvarova Y.A. (2011) Orlovite, KLi2 TiSi4 O11F, a new mineral of the mica group New Mineral Data 46:13-19; Agakhanov, A.A., Pautov, L.A., Sokolova, E., Hawthorne, F.C., Karpenko, V.Yu., Siidra, O.I., Muftakhov, V.A. (2016): Odigitriaite, CsNa5Ca5[Si14B2O38]F2, a new cesium borosilicate mineral from the Darai-Pioz alkaline massif, Tajikistan: Description and crystal structure. Mineralogical Magazine, 80, (in press).
  • Arizona
    • Pima Co.
      • Silver Bell Mts
        • Silver Bell District
          • Mineral Mountain
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 276; Roe, A. (1980), Micromounting in AZ, Min.Rec.: 11: 261-265.
  • Arkansas
    • Hot Spring Co.
      • Magnet Cove
Henry Barwood - unpublished (2010)
  • Utah
    • Duchesne Co.
Am Min 58:211-217
UGMS Bull 117 Minerals and Mineral Localities of Utah
Am Min 45:188-199
    • Uintah Co.
Min Rec 8:5 p378
UGMS Bull 117 Minerals and Mineral Localities of Utah
Min Rec 8:5 p371
      • Uteland Knoll District (Ouray District)
        • Ouray
Min Rec 8:5 p369
  • Wyoming
    • Sweetwater Co.
      • Green River formation
Am Min 46:420-429
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