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Roméite Group

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Jean-Baptiste L. Romé de l'Isle
Yellowish to reddish ...
5½ - 6½
Named in 1841 by Augustin Alexis Damour in honor of Jean Baptiste Louis Romé de L'Isle [August 26, 1736 Gray, Haute-Saône, France - July 3, 1790 Paris, France], the "father of crystallography". He was first an officer in the French Army and he developed the science of crystallography while he was a private curator for wealthy collectors of coins, minerals, etc.
Sb-dominant members of the Pyrochlore Supergroup.

The nomenclature was recently revised by Atencio et al. (2010); see also Christy & Atencio (2013).

Classification of Roméite Group

Group Name
First Published:

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
0 :
0 :

1 : A2X2O6(O,OH,F)

24 : Antimonates and Antimonites
2 : Antimonates of Be, Mg, Ca, Zn or Hg URL:
Please feel free to link to this page.

First Recorded Occurrence of Roméite Group

Place of Conservation of First Recorded Material:
Natural History Museum, Paris, France: #41.151, #41.152.

Occurrences of Roméite Group

Geological Setting:
Metamorphosed hydrothermal manganese deposits

Physical Properties of Roméite Group

Sub-Adamantine, Vitreous, Greasy
Diaphaneity (Transparency):
Transparent, Translucent
Yellowish to reddish brown, dark brown, red, light yellow
Nearly colourless, pale yellow.
Hardness (Mohs):
5½ - 6½
On {111}, poor.
Irregular/Uneven, Splintery
4.95 - 5.41 g/cm3 (Measured)    5.28 g/cm3 (Calculated)

Crystallography of Roméite Group

Crystal System:
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Space Group Setting:
Cell Parameters:
a = 10.28(4) Å
Unit Cell Volume:
V 1,086.37 ų (Calculated from Unit Cell)
Crystals octahedra, exhibiting subordinate forms {001}, {110}, {112}, {113}, and {133}. Crystalline aggregates, massive.
Rare on {111}.

Crystallographic forms of Roméite Group

Crystal Atlas:
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Romeite no.1 - Goldschmidt (1913-1926)
Romeite no.3 - 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

Optical Data of Roméite Group

RI values:
n = 1.817 - 1.854
Max Birefringence:
δ = 0.000 - Isotropic minerals have no birefringence
Surface Relief:
Very High
May be anomalously biaxial, weak to moderate, and which may be distributed in zones or sectors.

The indices of refraction vary markedly with composition (e.g.: 1.817 to 1.88).

Relationship of Roméite Group to other Species

Other Members of Group:
Group Members:
Cuproroméite Cu2Sb2(O,OH)7
Fluorcalcioroméite (Ca,Na,◻)2Sb25+(O,OH)6F
Fluornatroroméite (Na,Ca)2Sb2(O,OH)6F
Hydroxycalcioroméite (Ca,Sb3+)2(Sb5+,Ti)2O6(OH)
Oxycalcioroméite Ca2Sb2O6O
Oxyplumboroméite Pb2Sb2O6O
  Hydroxyferroroméite (Fe2+1.50.5)Sb25+O6(OH)
4.00.Microlite Group
4.00.Pyrochlore GroupA2Nb2(O,OH)6Z

Other Names for Roméite Group

Name in Other Languages:
Simplified Chinese:锑钙石
Traditional Chinese:銻鈣石

Other Information

Other Information:
Insoluble in acids. Decomposed by fusion with sodium carbonate.
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 Roméite Group

Reference List:
Damour (1841) Annales des mines: 20: 247 (as Roméine).

Damour (1853): 3: 179 (as Roméine).

Bertrand (1881) Bulletin de la Société française de Minéralogie: 4: 237.

Hussak and Prior (1895) Mineralogical Magazine: 11: 80.

Sjögren (1895) Geologiska Föeningens I Stockholm. Förhandlinger, Stockholm: 17: 313.

Hussak (1905) Centralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 240.

Lacroix, A. (1910) Minéralogie de la France et des ses colonies, Paris. 5 volumes: vol. 4: 360.

Goldschmidt, V. (1913) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 1: 1: 121 (atopite variety)

Pelloux (1913) Mus. Civ. Storia nat. Genova, Ann.: [3], 6: 22.

Schaller (1916) U.S. Geological Survey Bulletin 610: 81, 95.

Rose (1919) Centralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 268.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 128, 130.

Machatschki (1932) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 73: 159.

Machatschki (1932) Chemie der Erde, Jena: 7: 56.

Machatschki and Zedlitz (1932) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 82: 72.

Zedlitz (1932) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 81: 253.

Aminoff (1933) Ak. Stockholm, Handl.: [3]: 11: 14.

Hintze (1937) Erg.-Bd.: 571.

Pabst (1939) American Mineralogist: 24: 575.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 1020-1022.

American Mineralogist (1952): 37: 982-998.

Welin, E. (1968) X-ray powder data for minerals from Långban and the related mineral deposits of Central Sweden. Arkiv Mineral. Geol., 4(30), 499–541.

Dunn, P.J. & Leavens, P.B. (1980) American Mineralogist: 65: 196-199.

Dunn, P.J., et al (1980) American Mineralogist: 65: 1143-1145.

Dunn, Pete J. (1995): Franklin and Sterling Hill New Jersey: the world’s most magnificent mineral deposits, part 4: 604.

Brugger, J., Gieré, R., Graeser, S. and Meisser, N. (1997): Crystal chemistry of roméite. Contributions to Mineralogy and Petrology: 127: 136-146.

Lapis (2000): 25(3): 30-36.

Atencio D., Andrade M.B., Christy A.G., Giere R., Kartashov P.M. (2010): The pyrochlore supergroup of minerals: nomenclature. Canadian Mineralogist, 48, 673-698.

Christy, A. G. and Atencio, D. (2013): Clarification of status of species in the pyrochlore supergroup. Mineralogical Magazine, 77, 13-20.

Internet Links for Roméite Group

Localities for Roméite Group

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.
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