Mineralogy Database

Parabutlerite Mineral Data

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General Parabutlerite Information

Help on Chemical  Formula: Chemical Formula: Fe+++(SO4)(OH)•2(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Fe3+(SO4)(OH)•2(H2O)
Help on Environment: Environment: Alteration product of copapite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1938
Help on Locality: Locality: Alcaparrosa, near Cirritos Bayos, Antofagasta, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek para, and it's dimorph, bulterite,
Help on Name Pronunciation: Name Pronunciation: Parabutlerite + Pronunciation Say PARABUTLERITE
Help on Synonym: Synonym: ICSD 23506
  PDF 16-939

Parabutlerite Image

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Comments: Yellow to brownish yellow parabutlerite crystals.
Location: Shagand Yazd, Iran. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Parabutlerite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3666:1:0.3586
Help on Cell Dimensions: Cell Dimensions: a = 7.38, b = 20.13, c = 7.22, Z = 8; V = 1,072.60 Den(Calc)= 2.54
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pmnb
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.11(1), 4.99(1), 5.85(0.6),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 0 1 2) ( 1 1 1) ( 1 1 0) ( 0 1 1)

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Physical Properties of Parabutlerite

Help on Cleavage: Cleavage: {110} Indistinct
Help on Color: Color: Light brown orange, Light orange, Orange brown.
Help on Density: Density: 2.55
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light yellow

Optical Properties of Parabutlerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.02 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2623,KPDmeas= 0.2612,KC= 0.2666
Ncalc = 1.68
Help on Optical Data: Optical Data: Biaxial (+), a=1.589-1.598, b=1.66-1.663, g=1.737-1.75, bire=0.1480-0.1520, 2V(Calc)=86-88, 2V(Meas)=87. Dispersion r > v moderate.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): faint yellow.
Help on Pleochroism (z): Pleochroism (z): light yellow.

Calculated Properties of Parabutlerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.55 gm/cc
note: Specific Gravity of Parabutlerite =2.54 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0072162779
Boson Index = 0.9927837221
Help on Photoelectric: Photoelectric: PEParabutlerite = 8.92 barns/electron
U=PEParabutlerite x rElectron Density= 22.76 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Parabutlerite is Not Radioactive

Parabutlerite Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.09)where (A+ B++) (XO4) Zq�x(H2O)
  (31.09.02)Dana Group Parabutlerite Fe(SO4)(OH)•2(H2O) Pmnb 2/m 2/m 2/m
Help on  Strunz Class: 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 Parabutlerite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Parabutlerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - CalTech Mineral Spectroscopy
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 07.DC.10





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