Garrelsite-V Mineral Data

General Garrelsite-V Information

Chemical Formula:

Ba3NaSi2B7O16(OH)4

Composition:

Molecular Weight = 890.83 gm

Barium 46.25 % Ba 51.63 % BaO

Sodium 2.58 % Na 3.48 % Na₂O

Silicon 6.31 % Si 13.49 % SiO₂

Boron 8.49 % B 27.35 % B₂O₃

Hydrogen 0.45 % H 4.04 % H₂O

Oxygen 35.92 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ba₃NaSi₂B₇O₁₆(OH)₄

Environment:

In a borehole in dolomitic shales.

IMA Status:

Valid Species (Pre-IMA) 1955

Locality:

South Ouray No. 1 well, Uintah County, Utah. Link to MinDat.org Location Data.

Name Origin:

Named for Robert M. Garrels (1916-1988), U.S. Geochemist.

Name Pronunciation:

Garrelsite-V + Pronunciation

Garrelsite-V Crystallography

Axial Ratios:

a:b:c =1.7291:1:1.7054

Cell Dimensions:

a = 14.639, b = 8.466, c = 14.438, Z = 4; beta = 114.21° V = 1,631.98 Den(Calc)= 3.63

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c

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

By Intensity(I/I_o): 3.05(1), 3.64(0.8), 2.03(0.6),2.76(0.5), 2.87(0.5), 4.23(0.3), 6.13(0.3),

Physical Properties of Garrelsite-V

Color:

Colorless.

Density:

3.68

Diaphaneity:

Transparent

Habit:

Pyramidal - Crystals are shaped like pyramids.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Garrelsite-V

Gladstone-Dale:

CI meas= 0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.172,KPDmeas= 0.1697,KC= 0.1733
Ncalc = 1.63 - 1.64

Optical Data:

Biaxial (-), a=1.6, b=1.633, g=1.64, bire=0.0400

Calculated Properties of Garrelsite-V

Electron Density:

Bulk Density (Electron Density)=3.31 gm/cc
note: Specific Gravity of Garrelsite-V =3.63 gm/cc.

Fermion Index:

Fermion Index = 0.1
Boson Index = 0.9

Photoelectric:

PE_Garrelsite-V= 203.78 barns/electron
U=PE_Garrelsite-V x rElectron Density= 674.26 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Garrelsite-V is Not Radioactive

Garrelsite-V Classification

Dana Class:

27.01.07.01 (27)Compound Borates

(27.01)Dana Type

(27.01.07)Dana Group

27.01.07.01 Garrelsite-V Ba3NaSi2B7O16(OH)4 C 2/c 2/m

Strunz Class:

09.AJ.15 09 - SILICATES (Germanates)

09.A - Nesosilicates

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

09.AJ.15 Garrelsite-VIII Ba3NaSi2B7O16(OH)4 C 2/c 2/m

09.AJ.15 Garrelsite-V Ba3NaSi2B7O16(OH)4 C 2/c 2/m

Other Garrelsite-V Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Garrelsite-V :
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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Print or Cut-and-Paste your Garrelsite-V Specimen Label here :

Garrelsite-V

Ba3NaSi2B7O16(OH)4
Dana No: 27.01.07.01 Strunz No: 09.AJ.15
Locality:

Notes:

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