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Donnayite-(Y) Mineral Data

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General Donnayite-(Y) Information

Help on Chemical  Formula: Chemical Formula: Sr3NaCaY(CO3)6•3(H2O)
Help on Composition: Composition: Molecular Weight = 828.93 gm
   Sodium      2.77 %  Na    3.74 % Na2O
   Strontium  31.71 %  Sr   37.50 % SrO
   Calcium     4.83 %  Ca    6.76 % CaO
   Yttrium    10.73 %  Y    13.62 % Y2O3
   Hydrogen    0.73 %  H     6.52 % H2O
   Carbon      8.69 %  C    31.86 % CO2
   Oxygen     40.53 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sr3NaCaY(CO3)6•3(H2O)
Help on Environment: Environment: Nepheline syenites.
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: Mt. St. Hilare, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Joseph Desire Hubert Donnay (1902-1994), Belgian-American-Canadian crystallographer and minereralogist and Gabrielle (Hamburger) Donnay (1920-1987), American Canadian mine ralogist, McGill Univeristy.
Help on Name Pronunciation: Name Pronunciation: Donnayite-(Y) + Pronunciation Say DONNAYITE-(Y)
Help on Synonym: Synonym: IMA1978-007

Donnayite-(Y) Image

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Comments: Brown micro-crystals of donnayite-(Y) covering matrix.
Location: Mont. St. Hilaire, Rouville Co., Quebec, Canada. Scale: Picture size 1.5 cm.
© Tom Loomis / Dakota Matrix

Donnayite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0001:1:0.7548
Help on Cell Dimensions: Cell Dimensions: a = 9, b = 8.999, c = 6.793, Z = 1; alpha = 102.77°, beta = 116.28°, gamma = 59.99° V = 416.61 Den(Calc)= 3.30
Help on Crystal System: Crystal System: Triclinic - Pedial H-M Symbol (1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.839(1), 4.368(0.7), 6.103(0.4),

Physical Properties of Donnayite-(Y)

Help on Cleavage: Cleavage: {???} Indistinct, {001} Distinct
Help on Color: Color: Brown, Brownish yellow, Colorless, Gray, Gray white.
Help on Density: Density: 3.3
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Donnayite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1919,KPDmeas= 0.1873,KC= 0.1882
Ncalc = 1.61 - 1.62
Help on Optical Data: Optical Data: Biaxial (-), a=1.551-1.561, b=1.646, g=1.652, bire=0.0910-0.1010, 2V(Calc)=26-28, 2V(Meas)=0-20.

Calculated Properties of Donnayite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.14 gm/cc
note: Specific Gravity of Donnayite-(Y) =3.30 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEDonnayite-(Y) = 49.28 barns/electron
U=PEDonnayite-(Y) x rElectron Density= 154.60 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Donnayite-(Y) is Not Radioactive

Donnayite-(Y) Classification

Help on  Dana Class: Dana Class: (15)Hydrated Carbonates
  (15.03)where A+m B++n (XO3)p � x(H2O), (m+n):p = 1:1 and containing U, Th, Zr, Y
  (15.03.04)Mckelveyite Group Donnayite-(Y) Sr3NaCaY(CO3)6•3(H2O) P1 1 Mckelveyite-(Y) NaCa(Ba,Sr)3(Y,REE)(CO3)6•3(H2O) Cc m Mckelveyite-(Nd)* (Ba,Sr)(Ca,Na,Nd,REE)(CO3)2•3-10(H2O) P1 1 Weloganite Sr3Na2Zr(CO3)6•3(H2O) P1 1
Help on  Strunz Class: Strunz Class: 05.CC.05 05 - CARBONATES (NITRATES)
  05.C - Carbonates without Additional Anions, with H2O
  05.CC -With rare-earth elements (REE)
05.CC.05 Donnayite-(Y) Sr3NaCaY(CO3)6•3(H2O) P1 1
05.CC.05 Mckelveyite-(Nd)* (Ba,Sr)(Ca,Na,Nd,REE)(CO3)2•3-10(H2O) P1 1
05.CC.05 Mckelveyite-(Y) NaCa(Ba,Sr)3(Y,REE)(CO3)6•3(H2O) Cc m
05.CC.05 Weloganite Sr3Na2Zr(CO3)6•3(H2O) P1 1

Other Donnayite-(Y) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Donnayite-(Y) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 05.CC.05





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