Calcybeborosilite-(Y) Mineral Data

General Calcybeborosilite-(Y) Information

Chemical Formula:

(REE,Ca)2[ ](B,Be)2(SiO4)2(OH,O)2

Composition:

Molecular Weight = 437.09 gm

Calcium 9.17 % Ca 12.83 % CaO

La,Ce,Pr,Nd,Sm, 32.95 % RE 38.44 % REE₂O₃

Beryllium 1.24 % Be 3.43 % BeO

Iron 3.83 % Fe 4.93 % FeO

Silicon 12.85 % Si 27.49 % SiO₂

Boron 2.97 % B 9.56 % B₂O₃

Hydrogen 0.32 % H 2.89 % H₂O

Oxygen 36.24 % O

Fluorine 0.43 % F 0.43 % F

- % F -0.18 % -O=F₂

______ ______

100.00 % 99.82 % = TOTAL OXIDE

Empirical Formula:

REECaFe²⁺_0.3B_1.2Be_0.6Si₂O_8.5(OH)_1.4F_0.1

Environment:

Paleozoic alkaline granites intruding Silurian-aged rocks with a high content of boron. Probable intermediate composition between dataolite and hingginite-(Ce).

IMA Status:

Not Approved IMA 1963 (Dana # Added)

Locality:

Dara-i-Pioz massif on the southern slope of the Altai Range in Tajikistan. Link to MinDat.org Location Data.

Name Origin:

Named after it's composition of calcium, beryllium, boron and silicon.

Synonym:

Calcybeborosilite

Yttrian Datolite

Calcybeborosilite-(Y) Image

Images:

Calcybeborosilite-(Y) Bafertisite

Comments: Greenish-gray calcybeborosilite-(Y) grain intergrow with orange bafertisite platelet (upper left corner of the later). Associatied minerals are violet fluorite, white albite, black aegirine, light-yellow (red under UV lamp) cleiophane.
Location: Darai-Pioz (Dara-i-Pioz; Dara-Pioz) Glacier, Alai (Alayskiy) Range, Tien Shan Mts, Region of Republican Subordination, Tajikistan. Scale: Picture Size 12x10 mm.
© Pavel M. Kartashov

Calcybeborosilite-(Y) Crystallography

Axial Ratios:

a:b:c =1.2955:1:0.6271

Cell Dimensions:

a = 9.846, b = 7.6, c = 4.766, Z = 2; beta = 90.11° V = 356.64 Den(Calc)= 4.07

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 2.84(1)(121), 3.12(1)(211), 2.84(0.85)(121),3.12(0.8)(211), 2.54(0.7)(311), 2.97(0.7)(021), 3.42(0.45)(201),

Physical Properties of Calcybeborosilite-(Y)

Luster:

Vitreous - Greasy

Optical Properties of Calcybeborosilite-(Y)

Optical Data:

NCalc= 1.74 - from Gladstone-Dale relationship (KC = 0.1823) where Ncalc=Dcalc*KC+1

Calculated Properties of Calcybeborosilite-(Y)

Electron Density:

Bulk Density (Electron Density)=3.85 gm/cc
note: Specific Gravity of Calcybeborosilite-(Y) =4.07 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_{Calcybeborosilite-(Y)}= 200.26 barns/electron
U=PE_{Calcybeborosilite-(Y)} x r_electron= 770.90 barns/cc.

Radioactivity:

GRapi = 33,356.56 (Gamma Ray American Petroleum Institute Units)
Concentration of Calcybeborosilite-(Y) per GRapi unit = 29.98 (PPM)

Calcybeborosilite-(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) 911.86 ±227.97 grams of pure Calcybeborosilite-(Y) .

**Estimated Radioactivity from Calcybeborosilite-(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 / 7.77 cm	740,625	2.00E-05	33,356.56	10.97
100 gm / 3.61 cm	74,063	2.00E-06	3,335.66	1.10
10 gm / 1.67 cm	7,406	2.00E-07	333.57	0.11
1 gm / 7.77 mm	741	2.00E-08	33.36	0.01
0.1 gm / 3.61 mm	74	2.00E-09	3.34	0.00
0.01 gm / 1.67 mm	7	2.00E-10	0.33	0.00
0.001 gm / 0.78 mm	1	2.00E-11	0.03	0.00

Weight of pure Calcybeborosilite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.07 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
Estimated Thorium Activity ( 1.65 % Th) From Sum REE Elements (32.95 % REE)

Calcybeborosilite-(Y) Classification

Dana Class:

54.02.01a.05 (54)Nesosilicate Borosilicates and Some Beryllosilicates

(54.02)with B in [4] coordination

(54.02.01a)Datolite group (Datolite series)

54.02.01a.01 Datolite CaBSiO4(OH) P 2₁/c 2/m

54.02.01a.02 Hingganite-(Ce) (Ce,Ca)2([],Fe)Be2Si2O8[(OH),O]2 P 2₁/a 2/m

54.02.01a.03 Hingganite-(Y) Y2([])Be2Si2O8(OH)2 P 2₁/a 2/m

54.02.01a.04 Hingganite-(Yb) (Yb,Y)2([])Be2Si2O8(OH)2 P 2₁/a 2/m

54.02.01a.05 Calcybeborosilite-(Y)! (REE,Ca)2[](B,Be)2(SiO4)2(OH,O)2 P 2₁/a 2/m

Strunz Class:

09.AJ.20 09 - SILICATES (Germanates)

09.A - Nesosilicates

09.AJ -Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra,

09.AJ.20 Bakerite Ca4B4(BO4)(SiO4)3(OH)3•(H2O) P 2₁/c 2/m

09.AJ.20 Calcybeborosilite-(Y)! (REE,Ca)2[](B,Be)2(SiO4)2(OH,O)2 P 2₁/a 2/m

09.AJ.20 Calciogadolinite? CaREE(Fe)Be2Si2O10 P 2₁/a 2/m

09.AJ.20 Datolite CaBSiO4(OH) P 2₁/c 2/m

09.AJ.20 Hingganite-(Yb) (Yb,Y)2([])Be2Si2O8(OH)2 P 2₁/a 2/m

09.AJ.20 Homilite Ca2(Fe,Mg)B2Si2O10 P 2₁/a 2/m

09.AJ.20 Gadolinite-(Ce) (Ce,La,Nd,Y)2FeBe2Si2O10 P 2₁/c 2/m

09.AJ.20 Gadolinite-(Y) Y2FeBe2Si2O10 P 2₁/a 2/m

09.AJ.20 Hingganite-(Ce) (Ce,Ca)2([],Fe)Be2Si2O8[(OH),O]2 P 2₁/a 2/m

09.AJ.20 Hingganite-(Y) Y2([])Be2Si2O8(OH)2 P 2₁/a 2/m

09.AJ.20 Melanocerite-(Ce) (Ce,Th,Ca)5(Si,B)3O12(OH,F)•n(H2O)(?) Unk (HEX-R) Trig

09.AJ.20 Minasgeraisite-(Y) CaY2Be2Si2O10 P 2₁/a 2/m

Other Calcybeborosilite-(Y) Information

References:

NAME( AmMin, Vol 86, p 1537) PHYS. PROP.(List of New Min. Names,28-33th,1974-1984)

See Also:

Links to other databases for Calcybeborosilite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Calcybeborosilite-(Y)

(REE,Ca)2[ ](B,Be)2(SiO4)2(OH,O)2
Dana No: 54.02.01a.05 Strunz No: 09.AJ.20
Locality:

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