Brianyoungite Mineral Data

General Brianyoungite Information

Chemical Formula:

Zn3(CO3,SO4)(OH)4

Composition:

Molecular Weight = 333.22 gm

Zinc 58.87 % Zn 73.27 % ZnO

Hydrogen 1.21 % H 10.81 % H₂O

Carbon 2.70 % C 9.91 % CO₂

Sulfur 2.41 % S 6.01 % SO₃

Oxygen 34.81 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Zn₃(CO₃)_0.75(SO₄)_0.25(OH)₄

Environment:

Secondary post-mine mineral in limestone-hosted oxidized Pb-Zn ores.

IMA Status:

Approved IMA 1993

Locality:

Brownley Hill mine, near Alston, England. Link to MinDat.org Location Data.

Name Origin:

Named for Brian Young (1947- ), field geologist and mineralogist of the British Geological Survey, who provided the first specimens.

Name Pronunciation:

Brianyoungite + Pronunciation

Synonym:

IMA1991-053

Brianyoungite Image

Images:

Brianyoungite

Comments: Silky white aggregates of brianyoungite with small yellow crystals of sulfur on sphalerite.
Location: St Johannes Mine, Wolkenstein, Erzgebirge, Saxony, Germany. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Brianyoungite Crystallography

Axial Ratios:

a:b:c =2.5134:1:0.8674

Cell Dimensions:

a = 15.724, b = 6.256, c = 5.427, Z = 4; beta = 90° V = 533.85 Den(Calc)= 4.15

Crystal System:

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

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

By Intensity(I/I_o): 7.88(1), 15.44(1), 2.714(0.4),

Physical Properties of Brianyoungite

Cleavage:

{???} Perfect

Color:

Colorless.

Density:

3.93 - 4.09, Average = 4.01

Diaphaneity:

Transparent

Hardness:

2-2.5 - Gypsum-Finger Nail

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Brianyoungite

Gladstone-Dale:

CI meas= 0.13 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.159 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1548,KPDmeas= 0.1602,KC= 0.1841
Ncalc = 1.72 - 1.76

Optical Data:

Biaxial (?), a=1.635, b=1.65,

Calculated Properties of Brianyoungite

Electron Density:

Bulk Density (Electron Density)=3.86 gm/cc
note: Specific Gravity of Brianyoungite =4.01 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Brianyoungite}= 29.43 barns/electron
U=PE_{Brianyoungite} x rElectron Density= 113.69 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Brianyoungite is Not Radioactive

Brianyoungite Classification

Dana Class:

17.01.15.01 (17)Compound Carbonates

(17.01)with miscellaneous formulae

(17.01.15)Dana Group

17.01.15.01 Brianyoungite Zn3(CO3,SO4)(OH)4 C 2/m 2/m

Strunz Class:

05.BF.30 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

05.BF -With (Cl), SO4, PO4, TeO3

05.BF.30 Brianyoungite Zn3(CO3,SO4)(OH)4 C 2/m 2/m

Other Brianyoungite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(37th List of New Min.,Min. Mag.,19)

See Also:

Links to other databases for Brianyoungite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Brianyoungite Specimen Label here :

Brianyoungite

Zn3(CO3,SO4)(OH)4
Dana No: 17.01.15.01 Strunz No: 05.BF.30
Locality:

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