Butlerite Mineral Data

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)

IMA Status:

Valid Species (Pre-IMA) 1928

Locality:

Link to MinDat.org Location Data.

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

Diaphaniety:

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

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:

r_electron=2.56 gm/cc
note: r_Butlerite=2.55 gm/cc.

Fermion Index

Fermion Index = 0.00721
Boson Index = 0.99279

Photoelectric:

PE_Butlerite= 8.92 barns/electron
U=PE_Butlerite x r_electron= 22.85 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Butlerite is Not Radioactive

Butlerite Classification

Dana Class:

31.9.1.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.9)where (A+ B++) (XO4) Zq·x(H2O)

(31.9.1)Dana Group

31.9.1.1 Butlerite Fe(SO4)(OH)·2(H2O) P 2₁/m 2/m

Strunz Class:

VI/D.01-20 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium size

VI/D.01 - Metahohmannite - Xitieshanite series

VI/D.01-10 Metahohmannite Fe2[O(SO4)2]·4(H2O) P1 1

VI/D.01-20 Butlerite Fe(SO4)(OH)·2(H2O) P 2₁/m 2/m

VI/D.01-30 Parabutlerite Fe(SO4)(OH)·2(H2O) Pmnb 2/m 2/m 2/m

VI/D.01-40 Amarantite Fe(SO4)(OH)·3(H2O) P1 1

VI/D.01-50 Hohmannite Fe2(SO4)2(OH)2·7(H2O) P1 1

VI/D.01-60 Fibroferrite Fe(SO4)(OH)·5(H2O) R 3 3

VI/D.01-70 Xitieshanite Fe(SO4)(OH)·7(H2O) P 2₁/a 2/m

Other Butlerite 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 Butlerite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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

Butlerite

Fe+++(SO4)(OH)·2(H2O)
Dana No: 31.9.1.1 Strunz No: VI/D.01-20
Locality:

Notes: