Okanoganite-(Y) Mineral Data

Okanoganite-(Y) Mineral Data +

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General Okanoganite-(Y) Information

Chemical Formula:

(Na,Ca)3(Y,Ce)12Si6B2O27F14

Composition:

Molecular Weight = 2,660.88 gm

Barium 0.05 % Ba 0.06 % BaO

Sodium 1.41 % Na 1.90 % Na₂O

Strontium 0.07 % Sr 0.08 % SrO

Lithium 0.01 % Li 0.02 % Li₂O

Calcium 3.99 % Ca 5.58 % CaO

La,Ce,Pr,Nd,Sm, 36.91 % RE 43.06 % REE₂O₃

Yttrium 15.10 % Y 19.18 % Y₂O₃

Thorium 1.66 % Th 1.89 % ThO₂

Uranium 0.09 % U 0.11 % UO₃

Titanium 0.34 % Ti 0.57 % TiO₂

Beryllium 0.00 % Be 0.01 % BeO

Iron 1.55 % Fe 2.22 % Fe₂O₃

Silicon 7.08 % Si 15.15 % SiO₂

Boron 1.19 % B 3.85 % B₂O₃

Phosphorus 0.37 % P 0.85 % P₂O₅

Hydrogen 0.15 % H 1.35 % H₂O

Oxygen 22.85 % O

Fluorine 7.17 % F 7.17 % F

- % F -3.02 % -O=F₂

______ ______

100.00 % 100.02 % = TOTAL OXIDE

Empirical Formula:

Y_4.52REE_6.82Ca_2.65Na_1.63Th_0.19Sr_0.02Ba_0.01U_0.01Fe³⁺_0.74Ti_0.19Li_0.04Si_6.71P_0.32B_2.94 Be_0.01O_34.02(OH)_3.98F_10.04

Environment:

Isolated unaltered miarolitic cavities of an alkaline granite.

IMA Status:

Approved IMA 1980

Locality:

Golden Horn Batholith, near Washington Pass, Okanongan County, Washington. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Okanoganite-(Y) Image

Images:

Okanoganite-(Y)

Comments: Cream-colored twinned crystal of okanoganite-(Y) on matrix.
Location: Washington Pass, Okanogan County, Washington, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Okanoganite-(Y) Crystallography

Axial Ratios:

a:c = 1:2.52453

Cell Dimensions:

a = 10.7108, c = 27.0398, Z = 3; V = 2,686.45 Den(Calc)= 4.93

Crystal System:

Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: R 3m

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

By Intensity(I/I_o): 2.97(1), 2.939(0.95), 2.926(0.5),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Boiocchi M , Callegari A , Ottolini L , Maras A , American Mineralogist , 89 (2004) p.1540-1545, The chemistry and crystal structure of okanoganite-(Y) and, comparison with vicanite-(Ce), Sample: Golden Horn batholith near Washington Pass, Okanogan County

Physical Properties of Okanoganite-(Y)

Cleavage:

None

Color:

Light brown, Light pink, White, Yellow.

Density:

4.35

Habit:

Pseudo Tetragonal - Crystals show a tetragonal shape.

Habit:

Twinning Common - Crystals are usually twinned.

Hardness:

4 - Fluorite

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Dull

Streak:

white

Optical Properties of Okanoganite-(Y)

Gladstone-Dale:

CI meas= -0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.089 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1514,KPDmeas= 0.1716,KC= 0.1661

Optical Data:

Uniaxial (-), e=1.74, w=1.753, bire=0.0130.

Calculated Properties of Okanoganite-(Y)

Electron Density:

r_electron=3.98 gm/cc
note: r_{Okanoganite-(Y)}=4.35 gm/cc.

Fermion Index

Fermion Index = 0.07547
Boson Index = 0.92453

Photoelectric:

PE_{Okanoganite-(Y)}= 289.82 barns/electron
U=PE_{Okanoganite-(Y)} x r_electron=1,154.09 barns/cc.

Radioactivity:

GRapi = 39,466.34 (Gamma Ray American Petroleum Institute Units)

Okanoganite-(Y) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 770.70 ±192.67 grams of pure Okanoganite-(Y) .

**Estimated Radioactivity from Okanoganite-(Y)** - weak
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Bequerols (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.60 cm	905,356	2.45E-05	39,466.34	12.98
100 gm / 3.53 cm	90,536	2.45E-06	3,946.63	1.30
10 gm / 1.64 cm	9,054	2.45E-07	394.66	0.13
1 gm / 7.60 mm	905	2.45E-08	39.47	0.01
0.1 gm / 3.53 mm	91	2.45E-09	3.95	0.00
0.01 gm / 1.64 mm	9	2.45E-10	0.39	0.00
0.001 gm / 0.76 mm	1	2.45E-11	0.04	0.00

Weight of pure Okanoganite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.35 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem

Okanoganite-(Y) Classification

Dana Class:

54.2.4.3 (54)Nesosilicate Borosilicates and Some Beryllosilicates

(54.2)with B in [4] coordination

(54.2.4)Howlite and related species

54.2.4.1 Garrelsite-VIII Ba3NaSi2B7O16(OH)4 C 2/c 2/m

54.2.4.3 Okanoganite-(Y) (Na,Ca)3(Y,Ce)12Si6B2O27F14 R 3m 3m

Strunz Class:

VIII/B.33-20 VIII - Silicates

VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, with beryllium and boron

VIII/B.33 - Melanocerite-(Ce) - Tritomite-(Ce) series

VIII/B.33-10 Melanocerite-(Ce) (Ce,Th,Ca)5(Si,B)3O12(OH,F)·n(H2O)(?) Unk (HEX-R) Trig

VIII/B.33-20 Okanoganite-(Y) (Na,Ca)3(Y,Ce)12Si6B2O27F14 R 3m 3m

VIII/B.33-25 Vicanite-(Ce) (Ca,Ce,La,Th)15As(As0.5,Na0.5)FeSi6B4O40F7 R 3m 3m

VIII/B.33-30 Tritomite-(Y) (Y,Ca,La,Fe)5(Si,B,Al)3(O,OH,F)13(?) P 6₃/m 6/m

VIII/B.33-40 Tritomite-(Ce) (Ce,La,Ca,Y,Th)5(Si,B)3(O,OH,F)13 P 6₃/m 6/m

Other Okanoganite-(Y) Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990, AmMin 89:1540) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Okanoganite-(Y) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas

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

Okanoganite-(Y)

(Na,Ca)3(Y,Ce)12Si6B2O27F14
Dana No: 54.2.4.3 Strunz No: VIII/B.33-20
Locality:

Notes: