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UM1993-06-F:CaNaREEY

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Formula:
(Na,Ca)3(Y,REE)3F12
Colour:
colourless to pale rose
Lustre:
Vitreous
Specific Gravity:
4.45
Crystal System:
Hexagonal
Chemically resembles gagarinite-(Y). Indeed, inferred to be isostructural with this species and related to it as described by a substitution: NaCa(Y,REE)F6-Na1.5(Y,REE)1.5F6.

As grains, up to 0.5 mm in diameter, intergrown with quartz. In metasomatic formations, with riebeckite, astrophyllite, zircon, a pyrochlore group species, albite, and microcline.


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Classification of UM1993-06-F:CaNaREEYHide

Notes:
Unnamed (probably valid)

Physical Properties of UM1993-06-F:CaNaREEYHide

Vitreous
Colour:
colourless to pale rose
Tenacity:
Brittle
Density:
4.45 g/cm3 (Measured)    4.52 g/cm3 (Calculated)
Comment:
methods not stated

Optical Data of UM1993-06-F:CaNaREEYHide

Type:
Uniaxial (+)
RI values:
nω = 1.475 nε = 1.495
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of UM1993-06-F:CaNaREEYHide

Formula:
(Na,Ca)3(Y,REE)3F12

Crystallography of UM1993-06-F:CaNaREEYHide

Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Cell Parameters:
a = 5.9855(5) Å, c = 3.5469(4) Å
Ratio:
a:c = 1 : 0.593
Unit Cell V:
110.05 ų (Calculated from Unit Cell)
Z:
1

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 UM1993-06-F:CaNaREEYHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kabalov, Yu.K., Sokolova, Ye.V., and Grigor'yev, A.P. (1993): Determination of the crystal structure of the new mineral Na1.23Ca0.12Y1.28TR0.24F6 by the Rietveld method. Doklady Akad. Nauk, 330(6), 713-715 (in Russian); in: Jambor, J.L., Grew, E.S., and Roberts, A.C. (1994): New mineral names. American Mineralogist: 79: 1213
Smith, D.G.W., Nickel, E.H. (2007): A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist: 45: 983-1055; http://nrmima.nrm.se/Valid2009_03.pdf

Internet Links for UM1993-06-F:CaNaREEYHide

Localities for UM1993-06-F:CaNaREEYHide

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.
Russia
 
  • Tuva
Kabalov, Yu.K., Sokolova, Ye.V., and Grigor'yev, A.P. (1993): Determination of the crystal structure of the new mineral Na1.23Ca0.12Y1.28TR0.24F6 by the Rietveld method. Doklady Akad. Nauk, 330(6), 713-715 (in Russian; in: Jambor, J.L., Grew, E.S., and Roberts, A.C. (1994): New mineral names. American Mineralogist: 79: 1213
 
Mineral and/or Locality  
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