Ilesite Mineral Data

General Ilesite Information

Chemical Formula:

(Mn,Zn,Fe++)SO4•4(H2O)

Composition:

Molecular Weight = 226.29 gm

Manganese 14.57 % Mn 18.81 % MnO

Zinc 8.67 % Zn 10.79 % ZnO

Iron 2.47 % Fe 3.17 % FeO

Hydrogen 3.56 % H 31.84 % H₂O

Sulfur 14.17 % S 35.38 % SO₃

Oxygen 56.56 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺_0.6Zn_0.3Fe²⁺_0.1(SO₄)•4(H₂O)

Environment:

Secondary mineral formed by oxidiation of Mn-bearing sulfide minerals.

IMA Status:

Valid Species (Pre-IMA) 1881

Locality:

Sulfide veins at the head of Hall Valley, Park County, Colorado, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Malvern W. Iles (1853-1890), American metallurgist, Denver, Colorado.

Name Pronunciation:

Ilesite

Ilesite Image

Images:

Ilesite

Comments: Botryoidal to earthy, cream-colored ilesite.
Location: Chvaletice, KutnÃ¡ Hora, StredoceskÃ½ Kraj, Bohemia, Czech Republic. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Ilesite Crystallography

Axial Ratios:

a:b:c =0.4375:1:0.5821

Cell Dimensions:

a = 6.02, b = 13.76, c = 8.01, Z = 4; beta = 90.8° V = 663.45 Den(Calc)= 2.27

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): 4.48(1), 3.96(0.65), 5.56(0.65),

Physical Properties of Ilesite

Color:

Green, Greenish white, White.

Density:

2.261

Diaphaneity:

Transparent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Hardness:

2-3 - Gypsum-Calcite

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Ilesite

Gladstone-Dale:

CI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2278,KPDmeas= 0.2287,KC= 0.231
Ncalc = 1.52

Optical Data:

Biaxial (-), a=1.511, b=1.519, g=1.521, bire=0.0100

Calculated Properties of Ilesite

Electron Density:

Bulk Density (Electron Density)=2.29 gm/cc
note: Specific Gravity of Ilesite =2.26 gm/cc.

Fermion Index:

Fermion Index = 0.0054171149
Boson Index = 0.9945828851

Photoelectric:

PE_Ilesite= 9.31 barns/electron
U=PE_Ilesite x rElectron Density= 21.33 barns/cc.

Radioactivity:

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

Ilesite Classification

Dana Class:

29.06.06.03 (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 Ilesite Information

References:

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

See Also:

Links to other databases for Ilesite :
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
15 - WWW-MINCRYST

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

Ilesite

(Mn,Zn,Fe++)SO4•4(H2O)
Dana No: 29.06.06.03 Strunz No: 07.CB.15
Locality:

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