Saryarkite-(Y) Mineral Data

Saryarkite-(Y) Mineral Data +

General Saryarkite-(Y) Information

Chemical Formula:

Ca(Y,Th)Al5(SiO4)2(PO4,SO4)2(OH)7·6(H2O)

Composition:

Molecular Weight = 924.75 gm

Calcium 4.33 % Ca 6.06 % CaO

La,Ce,Pr,Nd,Sm, 6.23 % RE 7.27 % REE₂O₃

Yttrium 3.85 % Y 4.88 % Y₂O₃

Thorium 7.53 % Th 8.57 % ThO₂

Aluminum 14.59 % Al 27.56 % Al₂O₃

Silicon 6.68 % Si 14.29 % SiO₂

Phosphorus 5.02 % P 11.51 % P₂O₅

Hydrogen 1.94 % H 17.34 % H₂O

Sulfur 1.04 % S 2.60 % SO₃

Oxygen 48.79 % O

______ ______

100.00 % 100.09 % = TOTAL OXIDE

Empirical Formula:

CaY_0.4REE_0.4Th_0.3Al₅(SiO₄)_2.2(PO₄)_1.5(SO₄)_0.3(OH)_6.6·5.6(H₂O)

Environment:

In Devonian propylitized felsic effusives and in altered granitic rocks associated with quartzites.

IMA Status:

Approved IMA 1964

Locality:

Sary-Arka, Kazakhstan. Link to MinDat.org Location Data.

Name Origin:

Derivation of the name not given, probably for the locality; and for its high yttrium content.

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Saryarkite-(Y) Crystallography

Axial Ratios:

a:c = 1:0.79751

Cell Dimensions:

a = 8.213, c = 6.55, Z = 1; V = 441.82 Den(Calc)= 3.48

Crystal System:

Tetragonal - TrapezohedralH-M Symbol (4 2 2) Space Group: P 42₁2,P 4₂212

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

By Intensity(I/I_o): 1.854(1), 2.827(1), 3.014(1),

Physical Properties of Saryarkite-(Y)

Cleavage:

None

Color:

White.

Density:

3.07 - 3.15, Average = 3.11

Diaphaniety:

Semitransparent

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Massive - Fibrous - Distinctly fibrous fine-grained forms.

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Greasy (Oily)

Magnetism:

Weakly magnetic

Streak:

white

Optical Properties of Saryarkite-(Y)

Gladstone-Dale:

CI meas= 0.088 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.185 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1761,KPDmeas= 0.1971,KC= 0.2162

Optical Data:

Uniaxial (+), w=1.606, e=1.62, bire=0.0140.

Calculated Properties of Saryarkite-(Y)

Electron Density:

r_electron=3.05 gm/cc
note: r_{Saryarkite-(Y)}=3.11 gm/cc.

Fermion Index

Fermion Index = 0.01508
Boson Index = 0.98492

Photoelectric:

PE_{Saryarkite-(Y)}= 203.62 barns/electron
U=PE_{Saryarkite-(Y)} x r_electron= 621.10 barns/cc.

Radioactivity:

GRapi = 157,528.66 (Gamma Ray American Petroleum Institute Units)

Saryarkite-(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) 193.09 ± 48.27 grams of pure Saryarkite-(Y) .

**Estimated Radioactivity from Saryarkite-(Y)** - strong
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 / 8.50 cm	3,372,852	9.12E-05	157,528.66	51.79
100 gm / 3.95 cm	337,285	9.12E-06	15,752.87	5.18
10 gm / 1.83 cm	33,729	9.12E-07	1,575.29	0.52
1 gm / 8.50 mm	3,373	9.12E-08	157.53	0.05
0.1 gm / 3.95 mm	337	9.12E-09	15.75	0.01
0.01 gm / 1.83 mm	34	9.12E-10	1.58	0.00
0.001 gm / 0.85 mm	3	9.12E-11	0.16	0.00

Weight of pure Saryarkite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.11 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

Saryarkite-(Y) Classification

Dana Class:

53.2.1.1 (53)Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations

(53.2)with (SO4), (CrO4), (PO4), etc.

(53.2.1)Dana Group

53.2.1.1 Saryarkite-(Y) Ca(Y,Th)Al5(SiO4)2(PO4,SO4)2(OH)7·6(H2O) P 42₁2,P 4₂212 4 2 2

Strunz Class:

VIII/B.20-10 VIII - Silicates

VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cationes with coordinationnumber between [8] and [12]

VIII/B.20 - Saryarkite-(Y) series

VIII/B.20-10 Saryarkite-(Y) Ca(Y,Th)Al5(SiO4)2(PO4,SO4)2(OH)7·6(H2O) P 42₁2,P 4₂212 4 2 2

Other Saryarkite-(Y) Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)

See Also:

Links to other databases for Saryarkite-(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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Saryarkite-(Y)

Ca(Y,Th)Al5(SiO4)2(PO4,SO4)2(OH)7·6(H2O)
Dana No: 53.2.1.1 Strunz No: VIII/B.20-10
Locality:

Notes: