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Beraunite Mineral Data

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General Beraunite Information

Help on Chemical  Formula: Chemical Formula: Fe++Fe+++5(PO4)4(OH)5•4(H2O)
Help on Composition: Composition: Molecular Weight = 872.07 gm
   Iron        38.42 %  Fe    8.24 % FeO / 45.78 % Fe2O3
   Phosphorus  14.21 %  P    32.55 % P2O5
   Hydrogen     1.50 %  H    13.43 % H2O
   Oxygen      45.87 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+Fe3+5(PO4)4(OH)5•4(H2O)
Help on Environment: Environment: A component of bog iron ores; a cement in clays, sands, and bone material; an alteration product of triphylite in granite pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1841
Help on Locality: Locality: Many localities are known; some with well-studied material include: in the Hrbek mine, Svata Dobrotiva (St. Benigna), near Beroun, Czech Republic. In Germany, from the Eleonore and Rot Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For its occurrence near Beroun (formerly Beraun), Czech Republic.
Help on Name Pronunciation: Name Pronunciation: Beraunite + Pronunciation Say BERAUNITE
Help on Synonym: Synonym: ICSD 203096
  PDF 22-631

Beraunite Image

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Comments: Green and reddish brown, beraunite aggregates.
Location: Arean Claim, Three Oak Gap, Mena, Polk County, Arkansas, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Beraunite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =4.0253:1:3.7459
Help on Cell Dimensions: Cell Dimensions: a = 20.646, b = 5.129, c = 19.213, Z = 4; beta = 93.34° V = 2,031.07 Den(Calc)= 2.85
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.37(1), 3.082(0.6), 4.825(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: ( 1 1 1) ( 1 0 0) ( 0 0 1)

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Physical Properties of Beraunite

Help on Cleavage: Cleavage: {100} Good
Help on Color: Color: Green, Greenish brown, Gray green, Dark greenish brown, Dark red.
Help on Density: Density: 2.9
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.
Help on Habit: Habit: Globular - Spherical, or nearly so, rounded forms (e.g. wavellite).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 2 - Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: green brown

Optical Properties of Beraunite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.031 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.049 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2779,KPDmeas= 0.2731,KC= 0.2649
Ncalc = 1.76 - 1.77
Help on Optical Data: Optical Data: Biaxial (+), a=1.775, b=1.786, g=1.815, bire=0.0400, 2V(Calc)=66, 2V(Meas)=30-60. Dispersion relatively weak.

Calculated Properties of Beraunite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.85 gm/cc
note: Specific Gravity of Beraunite =2.90 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0083682919
Boson Index = 0.9916317081
Help on Photoelectric: Photoelectric: PEBeraunite = 12.09 barns/electron
U=PEBeraunite x rElectron Density= 34.50 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Beraunite is Not Radioactive

Beraunite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.11)where (AB)4 (XO4)3 Zq � x(H2O)
  (42.11.16)Dana Group Beraunite FeFe5(PO4)4(OH)5•4(H2O) C 2/c 2/m
Help on  Strunz Class: Strunz Class: 08.DC.27 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DC -With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
08.DC.27 Beraunite FeFe5(PO4)4(OH)5•4(H2O) C 2/c 2/m

Other Beraunite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Beraunite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
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: 08.DC.27





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