Brianyoungite Mineral Data

Brianyoungite Mineral Data +

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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

IMA Status:

Approved IMA 1993

Locality:

Link to MinDat.org Location Data.

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 - PrismaticH-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

Diaphaniety:

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

Optical Data:

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

Calculated Properties of Brianyoungite

Electron Density:

r_electron=3.86 gm/cc
note: r_{Brianyoungite}=4.01 gm/cc.

Fermion Index

Fermion Index = 0.02478
Boson Index = 0.97522

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Brianyoungite is Not Radioactive

Brianyoungite Classification

Dana Class:

17.1.15.1 (17)Compound Carbonates

(17.1)with miscellaneous formulae

(17.1.15)Dana Group

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

Strunz Class:

V/C.01-105 V - Nitrates, Carbonates and Borates

V/C - Waterfree carbonates with unfamiliar anions

V/C.01 - Azurite - Rosasite group and related compounds

V/C.01-10 Azurite Cu3(CO3)2(OH)2 P 2₁/a 2/m

V/C.01-20 Malachite Cu2(CO3)(OH)2 P 2₁/a 2/m

V/C.01-25 Georgeite Cu5(CO3)3(OH)4·6(H2O) None

V/C.01-30 Pokrovskite Mg2(CO3)(OH)2·0.5(H2O) P 2₁/a 2/m

V/C.01-40 Mcguinnessite (Mg,Cu)2(CO3)(OH)2 P 2/a or P 2₁/a 2/m

V/C.01-50 Kolwezite (Cu,Co)2(CO3)(OH)2 P1 or P1 Tri

V/C.01-60 Glaukosphaerite (Cu,Ni)2(CO3)(OH)2 P 2₁/a 2/m

V/C.01-70 Nullaginite Ni2(CO3)(OH)2 P 2₁/m,P 2₁ Mono

V/C.01-80 Rosasite (Cu,Zn)2(CO3)(OH)2 P 2₁/a 2/m

V/C.01-90 Zincrosasite (Zn,Cu)2(CO3)(OH)2 P 2₁/a 2/m

V/C.01-100 Hydrozincite Zn5(CO3)2(OH)6 C 2/m 2/m

V/C.01-105 Brianyoungite Zn3(CO3,SO4)(OH)4 C 2/m 2/m

V/C.01-110 Aurichalcite (Zn,Cu)5(CO3)2(OH)6 P 2₁/m 2/m

V/C.01-120 Loseyite (Mn,Zn)7(CO3)2(OH)10 A2/a 2/m

V/C.01-130 Sclarite (Zn,Mg,Mn)4Zn3(CO3)2(OH)10 A2/a 2/m

Other Brianyoungite Information

References:

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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Brianyoungite

Zn3(CO3,SO4)(OH)4
Dana No: 17.1.15.1 Strunz No: V/C.01-105
Locality:

Notes: