Butlerite Mineral Data

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General Butlerite Information

Chemical Formula:

Fe+++(SO4)(OH)•2(H2O)

Composition:

Molecular Weight = 204.95 gm

Iron 27.25 % Fe 38.96 % Fe₂O₃

Hydrogen 2.46 % H 21.98 % H₂O

Sulfur 15.65 % S 39.07 % SO₃

Oxygen 54.65 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺(SO₄)(OH)•2(H₂O)

Environment:

Rarely formed from the oxidation of pyritic ore; may be formed under fumarolic conditions from mine fires.

IMA Status:

Valid Species (Pre-IMA) 1928

Locality:

United Verde copper mine, Jerome, Yavapai Co., Arizona. Link to MinDat.org Location Data.

Name Origin:

Named for Gurdon Montague Butler (1881-1961), American mining geologist, University of Arizona, Tucson, Arizona, USA.

Name Pronunciation:

Butlerite + Pronunciation

Synonym:

ICSD 155199

PDF 25-409

Butlerite Image

Images:

Butlerite

Comments: Orange butlerite crystals.
Location: United Verde mine, Jerome, Yavapai County, Arizona, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Butlerite Crystallography

Axial Ratios:

a:b:c =0.8809:1:0.803

Cell Dimensions:

a = 6.44, b = 7.31, c = 5.87, Z = 2; beta = 108.583° V = 261.93 Den(Calc)= 2.60

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/m

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

By Intensity(I/I_o): 4.97(1), 3.15(0.8), 3.59(0.6),

Forms:

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Forms: ( 0 1 1) ( 1 1 0) ( 1 0 1) ( 1 0 0) ( 0 0 1)

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Crystal Structure:

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Fanfani L , Nunzi A , Zanazzi P F , American Mineralogist , 56 (1971) p.751-757, The crystal structure of butlerite

Physical Properties of Butlerite

Cleavage:

{100} Perfect

Color:

Dark yellow, Orange.

Density:

2.55

Diaphaneity:

Transparent

Hardness:

2.5 - Finger Nail

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

light yellow

Optical Properties of Butlerite

Gladstone-Dale:

CI meas= 0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.036 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2569,KPDmeas= 0.262,KC= 0.2666
Ncalc = 1.68 - 1.69

Optical Data:

Biaxial (+/-), a=1.593-1.604, b=1.665-1.674, g=1.731-1.741, bire=0.1370-0.1380

Calculated Properties of Butlerite

Electron Density:

Bulk Density (Electron Density)=2.56 gm/cc
note: Specific Gravity of Butlerite =2.55 gm/cc.

Fermion Index:

Fermion Index = 0.0072162779
Boson Index = 0.9927837221

Photoelectric:

PE_Butlerite= 8.92 barns/electron
U=PE_Butlerite x rElectron Density= 22.85 barns/cc.

Radioactivity:

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

Butlerite Classification

Dana Class:

31.09.01.01 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.09)where (A+ B++) (XO4) Zq·x(H2O)

(31.09.01)Dana Group

31.09.01.01 Butlerite Fe(SO4)(OH)•2(H2O) P 2₁/m 2/m

Strunz Class:

07.DC.10 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DC -With only medium-sized cations; chains of corner-sharing octahedra

07.DC.10 Butlerite Fe(SO4)(OH)•2(H2O) P 2₁/m 2/m

07.DC.10 Parabutlerite Fe(SO4)(OH)•2(H2O) Pmnb 2/m 2/m 2/m

Other Butlerite 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 Butlerite :
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 Butlerite Specimen Label here :

Butlerite

Fe+++(SO4)(OH)•2(H2O)
Dana No: 31.09.01.01 Strunz No: 07.DC.10
Locality:

Notes: