Reederite-(Y) Mineral Data

General Reederite-(Y) Information

Chemical Formula:

Na15Y2(CO3)9(SO3F)Cl

Composition:

Molecular Weight = 1,197.26 gm

Sodium 28.80 % Na 38.83 % Na₂O

Yttrium 14.85 % Y 18.86 % Y₂O₃

Carbon 9.03 % C 33.08 % CO₂

Sulfur 2.68 % S 5.35 % SO₂

Chlorine 2.96 % Cl 2.96 % Cl

- % Cl -0.67 % -O=Cl₂

Oxygen 40.09 % O

Fluorine 1.59 % F 1.59 % F

- % F -0.67 % -O=F₂

______ ______

100.00 % 99.33 % = TOTAL OXIDE

Empirical Formula:

Na₁₅Y₂(CO₃)₉(SO₃)FCl

Environment:

Inclusions in a trona-filled vug in a sodalite xenolith in syenite.

IMA Status:

Approved IMA 1994 (Dana # Added)

Locality:

Poudrette Quarry, Mont Saint-Hilaire, Rouville County, Quebec, Canada. Link to MinDat.org Location Data.

Name Origin:

Named for Dr. Richard J. Reeder, currently co-editor of the American Mineralogist.

Name Pronunciation:

Reederite-(Y) + Pronunciation

Synonym:

ICSD 80832

IMA1994-012

PDF 48-1893

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Reederite-(Y) Crystallography

Axial Ratios:

a:c = 1:1.22489

Cell Dimensions:

a = 8.773, c = 10.746, Z = 1; V = 716.27 Den(Calc)= 2.78

Crystal System:

Hexagonal - Trigonal DipyramidalH-M Symbol (6) Space Group: P 6

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.532(1), 2.774(0.8), 4.39(0.8),

Crystal Structure:

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Grice J D , Gault R A , Chao G Y , American Mineralogist , 80 (1995) p.1059-1064, Reederite -(Y), a new sodium rare-earth mineral with a unique fluorosulfate, anion

Physical Properties of Reederite-(Y)

Cleavage:

{001} Perfect

Color:

Yellow, Orange brown.

Density:

2.91

Diaphaneity:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Blocky - Crystal shape tends to be equant (e.g. feldspars).

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

3-3.5 - Calcite-Copper Penny

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Reederite-(Y)

Dichroism (e):

colorless.

Dichroism (w):

colorless.

Gladstone-Dale:

CI meas= 0.067 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1951,KPDmeas= 0.1864,KC= 0.1998
Ncalc = 1.56 - 1.58

Optical Data:

Uniaxial (-), e=1.537, w=1.548, bire=0.0110.

Calculated Properties of Reederite-(Y)

Electron Density:

Bulk Density (Electron Density)=2.69 gm/cc
note: Specific Gravity of Reederite-(Y) =2.78 gm/cc.

Fermion Index:

Fermion Index = 0.0013864829
Boson Index = 0.9986135171

Photoelectric:

PE_{Reederite-(Y)}= 18.95 barns/electron
U=PE_{Reederite-(Y)} x rElectron Density= 50.96 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Reederite-(Y) is Not Radioactive

Reederite-(Y) Classification

Dana Class:

17.01.14.02 (17)Compound Carbonates

(17.01)with miscellaneous formulae

(17.01.14)Dana Group

17.01.14.01 Mineevite-(Y) Na25Ba(Y,Gd,Dy)2(HCO3)4(CO3)11(SO4)2ClF2 P 6₃/m 6/m

17.01.14.02 Reederite-(Y)! Na15Y2(CO3)9(SO3F)Cl P 6 6

Strunz Class:

05.BF.20 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

05.BF -With (Cl), SO4, PO4, TeO3

05.BF.20 Reederite-(Y)! Na15Y2(CO3)9(SO3F)Cl P 6 6

Other Reederite-(Y) Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.80,p1059-1064,1995) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Reederite-(Y) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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Print or Cut-and-Paste your Reederite-(Y) Specimen Label here :

Reederite-(Y)

Na15Y2(CO3)9(SO3F)Cl
Dana No: 17.01.14.02 Strunz No: 05.BF.20
Locality:

Notes: