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About Sahamalite-(Ce)Hide

Thure G. Sahama
Specific Gravity:
Crystal System:
Named in honor of Thure Georg Sahama (14 October 1910, Viipuri (Vyborg), Karelia, Finland - 8 March 1983), Professor of Geochemistry and Mineralogy, University of Helsinki, Finland, for his significant contributions to the understanding of the association and the abundance of the rare earths in eruptive rocks and in minerals. He helped describe nearly twenty new mineral species and was an honorary member of mineralogical societies from a number of countries. Originally named sahamalite, the suffix was added in 1987 to denote the dominant rare earth.
This page provides mineralogical data about Sahamalite-(Ce).

Classification of Sahamalite-(Ce)Hide

Approved, 'Grandfathered' (first described prior to 1959)
First Published:

A : Carbonates without additional anions, without H2O
D : With rare-earth elements (REE)

4 : Miscellaneous

11 : Carbonates
8 : Carbonates of the rare earths

Physical Properties of Sahamalite-(Ce)Hide

{010} poor, {201} trace only.
4.30 g/cm3 (Measured)    4.30 g/cm3 (Calculated)

Optical Data of Sahamalite-(Ce)Hide

Biaxial (-)
RI values:
nα = 1.679(2) nβ = 1.776(2) nγ = 1.807(2)
Measured: 57° , Calculated: 57°
Max Birefringence:
δ = 0.128
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
r < v perceptible

Chemical Properties of Sahamalite-(Ce)Hide

IMA Formula:

Crystallography of Sahamalite-(Ce)Hide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 5.894(1) Å, b = 16.116(3) Å, c = 4.612(1) Å
β = 106.54(1)°
a:b:c = 0.366 : 1 : 0.286
Unit Cell V:
419.96 ų
Euhedral prisms flattened on {201}, complex morphology showing {110},{120},{010},{131},{011},{012},{142}; in subparallel-radiating aggregates.

Type Occurrence of Sahamalite-(Ce)Hide

Geological Setting of Type Material:
Accessory in baryte-dolomite-REE carbonatite (type locality).
Jaffe, H.W., Meyrowitz, R., Evans, H.T. (1953) Sahamalite, a new rare earth carbonate mineral. American Mineralogist: 38: 741-754.

Other Language Names for Sahamalite-(Ce)Hide

Related Minerals - Nickel-Strunz GroupingHide

5.AD.15Petersenite-(Ce)Na4(Ce,La,Nd)2(CO3)5Mon. 2 : P21
5.AD.15Rémondite-(Ce)Na3(Ce,Ca,Na)3(CO3)5Mon. 2 : P21
5.AD.15Rémondite-(La)Na3(La,Ca,Na)3(CO3)5Mon. 2 : P21
5.AD.20Paratooite-(La)(La,Sr,Ca)4CuCa(Na,Ca)2(CO3)8Orth. mmm (2/m 2/m 2/m) : Pbam

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

11.8.1Calkinsite-(Ce)(Ce,La)2(CO3)3 · 4H2OOrth.
11.8.2Lanthanite-(La)(La,Ce)2(CO3)3 · 8H2OOrth.
11.8.3Lanthanite-(Ce)(Ce,La,Nd)2(CO3)3 · 8H2OOrth. mmm (2/m 2/m 2/m)
11.8.4Lanthanite-(Nd)(Nd,La)2(CO3)3 · 8H2OOrth.
11.8.5Hydroxylbastnäsite-(Ce)Ce(CO3)(OH)Hex. 6 : P6
11.8.8Rémondite-(Ce)Na3(Ce,Ca,Na)3(CO3)5Mon. 2 : P21
11.8.9Tengerite-(Y)Y2(CO3)3 · 2-3H2OOrth. mmm (2/m 2/m 2/m) : Pnnm
11.8.10Kimuraite-(Y)Ca(Y,Nd)2(CO3)4 · 6H2OOrth.
11.8.11Lokkaite-(Y)Ca(Y,Gd,Nd,Dy)4(CO3)7 · 9H2OOrth.
11.8.12Calcioancylite-(Nd)Ca(Nd,La,Ce)(CO3)2(OH).H2OMon. m : Pm
11.8.13Calcioancylite-(Ce)(Ce,Ca,Sr)CO3(OH,H2O)Orth. mmm (2/m 2/m 2/m)
11.8.14Burbankite(Na,Ca)3(Sr,Ba,Ce)3(CO3)5Hex. 6mm : P63mc
11.8.16Donnayite-(Y)NaCaSr3Y(CO3)6 · 3H2OTric. 1 : P1
11.8.17Carbocernaite(Ca,Na)(Sr,Ce,Ba)(CO3)2Orth. mm2
11.8.18Ancylite-(Ce)CeSr(CO3)2(OH) · H2OOrth. mmm (2/m 2/m 2/m)
11.8.19EwalditeBa(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2OHex. 6mm : P63mc
11.8.20Mckelveyite-(Y)NaCaBa3Y(CO3)6 · 3H2OTric. 1 : P1

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 Sahamalite-(Ce)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Jaffe, H.W., Meyrowitz, R., Evans, H.T. (1953) Sahamalite, a new rare earth carbonate mineral. American Mineralogist: 38: 741-754.
Fleischer, M. (1954) New mineral names. American Mineralogist: 39: 402-408.
Pertlik, F. , Preisinger, A. (1983) Crystal structure of sahamalite (Mg,Fe)RE2(CO3)4, Locality: Mountain Pass mine, San Bernardino County, California. Tschermaks Mineralogische und Petrographische Mitteilungen: 31: 39-46.
Nickel, E.H., Mandarino, J.A. (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature. American Mineralogist: 72: 1031-1042.

Internet Links for Sahamalite-(Ce)Hide

Localities for Sahamalite-(Ce)Hide

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.
  • Republic of Karelia
    • Prääsä District
Ivashchenko, V. I., Bushmin, S. A., Ruchyev, A. M., Kornakov, A. S., Bogomolov, E. S., Savva, E. V., ... & Frolov, P. V. (2018, June). First Evidence of the Archean Age of Orogenic Gold of the Russian Part of the Karelian Craton (Fennoscandian Shield): Sm–Nd Mineral Isochron for Gold-Bearing Metasomatites of the Novye Peski Deposit. In Doklady Earth Sciences (Vol. 480, No. 2, pp. 804-809). Pleiades Publishing.
  • California
    • San Bernardino Co.
      • Clark Mts (Clark Mountain Range)
        • Mountain Pass District
          • Mountain Pass
Jaffe, H.W., et al (1953), Sahamalite, a new rare earth carbonate mineral, American Mineralogist: 38: 741.; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 222; Haxel, G. (2005) Ultrapotassic rocks, carbonatite and rare earth element deposit, Mountain Pass, southern California. In: Geology and Mineral Resources of the Mojava National Preserve, southern California. USGS Bulletin 2160.
  • Wyoming
    • Campbell Co.
      • Reno Junction
American Mineralogist, Volume 73, pages 1440-1448, 1988
Mineral and/or Locality  
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