Boyleite Mineral Data

General Boyleite Information

Chemical Formula:

(Zn,Mg)SO4•4(H2O)

Composition:

Molecular Weight = 223.24 gm

Magnesium 2.72 % Mg 4.51 % MgO

Zinc 21.97 % Zn 27.34 % ZnO

Hydrogen 3.61 % H 32.28 % H₂O

Sulfur 14.36 % S 35.86 % SO₃

Oxygen 57.33 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Zn_0.75Mg_0.25(SO₄)•4(H₂O)

Environment:

Alteration product of sphalerite in a hydrothermal Pb-Zn vein.

IMA Status:

Approved IMA 1978

Locality:

Kropbach quarry, Munstertal, Black Forest, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for Robert William Boyle (1920- ), Canadian geochemist, Geological Survey of Canada, Ottawa, Canada.

Name Pronunciation:

Boyleite

Synonym:

IMA1977-026

Boyleite Image

Images:

Boyleite

Comments: Powdery white crust of boyleite on pyrite.
Location: Kotzebue, Alaska, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Boyleite Crystallography

Axial Ratios:

a:b:c =0.4374:1:0.5852

Cell Dimensions:

a = 5.95, b = 13.6, c = 7.96, Z = 4; beta = 90.3° V = 644.11 Den(Calc)= 2.30

Crystal System:

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

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

By Intensity(I/I_o): 4.47(1), 5.46(1), 6.85(0.8),

Physical Properties of Boyleite

Cleavage:

None

Color:

White.

Density:

2.41

Diaphaneity:

Transparent to Translucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Hardness:

2 - Gypsum

Luster:

Vitreous - Dull

Streak:

white

Optical Properties of Boyleite

Gladstone-Dale:

CI meas= 0.025 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2303,KPDmeas= 0.2198,KC= 0.2255
Ncalc = 1.52 - 1.54

Optical Data:

Biaxial (-), a=1.522, b=1.531, g=1.536, bire=0.0140, 2V(Calc)=72, 2V(Meas)=70.

Calculated Properties of Boyleite

Electron Density:

Bulk Density (Electron Density)=2.34 gm/cc
note: Specific Gravity of Boyleite =2.30 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Boyleite= 11.36 barns/electron
U=PE_Boyleite x rElectron Density= 26.57 barns/cc.

Radioactivity:

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

Boyleite Classification

Dana Class:

29.06.06.05 (29)Hydrated Acid and Sulfates

(29.06)where A XO4 ï¿½ x(H2O)

(29.06.06)Rozenite Group (Monoclinic)

29.06.06.01 Rozenite FeSO4•4(H2O) P 2₁/n 2/m

29.06.06.02 Starkeyite MgSO4•4(H2O) P 2₁/n 2/m

29.06.06.03 Ilesite (Mn,Zn,Fe)SO4•4(H2O) P 2₁/n 2/m

29.06.06.04 Aplowite (Co,Mn,Ni)SO4•4(H2O) P 2₁/m 2/m

29.06.06.05 Boyleite (Zn,Mg)SO4•4(H2O) P 2₁/n 2/m

29.06.06.06 IMA2002-034! CdSO4•4(H2O) P 2₁/n 2/m

Strunz Class:

07.CB.15 07 - SULFATES (SELENATES, TELLURATES)

07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O

07.CB -With only medium-sized cations

07.CB.15 Boyleite (Zn,Mg)SO4•4(H2O) P 2₁/n 2/m

07.CB.15 Aplowite (Co,Mn,Ni)SO4•4(H2O) P 2₁/m 2/m

07.CB.15 Ilesite (Mn,Zn,Fe)SO4•4(H2O) P 2₁/n 2/m

07.CB.15 Rozenite FeSO4•4(H2O) P 2₁/n 2/m

07.CB.15 Starkeyite MgSO4•4(H2O) P 2₁/n 2/m

07.CB.15 IMA2002-034! CdSO4•4(H2O) P 2₁/n 2/m

Other Boyleite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Boyleite :
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 Boyleite Specimen Label here :

Boyleite

(Zn,Mg)SO4•4(H2O)
Dana No: 29.06.06.05 Strunz No: 07.CB.15
Locality:

Notes:

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