Mrazekite Mineral Data
General Mrazekite Information
Chemical Formula:
Bi+++2Cu++3(PO4)2O2(OH)2•2(H2O)
Composition:
Molecular Weight = 900.59 gm
Copper 21.17 % Cu 26.50 % CuO
Bismuth 46.41 % Bi 51.74 % Bi2 O3
Phosphorus 6.88 % P 15.76 % P2 O5
Hydrogen 0.67 % H 6.00 % H2 O
Oxygen 24.87 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Bi2 Cu3 (PO4 )2 O2 (OH)2 •2(H2 O)
Environment:
Vesuvianite=grossular skarn invaded by secondary copper, bismuth, and vanadium mineralization.
IMA Status:
Approved IMA 1992
Locality:
Benambra, Victoria, Australia. Link to MinDat.org Location Data.
Name Origin:
Named for Zdenek Mrazek (1952-1984) who discovered the mineral.
Name Pronunciation:
Mrazekite + Pronunciation
Synonym:
ICSD 79140
IMA1990-045
PDF 47-1787
Mrazekite Image
Images:
Mrazekite
Comments: Blue, prismatic crystal of mrázekite on matrix.
Location: Arme Hilfe Mine, Ullersreuth, Hirschberg, Vogtland, Saxony, Germany.
Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag
Mrazekite Crystallography
Axial Ratios:
a:b:c =1.4323:1:3.3544
Cell Dimensions:
a = 9.057, b = 6.323, c = 21.21, Z = 4; beta = 101.3333° V = 1,190.96 Den(Calc)= 5.02
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21 /n
X Ray Diffraction:
By Intensity(I/Io ): 3.04(1), 2.924(0.83), 7.625(0.78),
Physical Properties of Mrazekite
Cleavage:
{???} Good
Color:
Blue, Cerulean blue.
Density:
4.9
Diaphaneity:
Transparent to translucent
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Spherical - Spherical, rounded aggregates.
Hardness:
2-3 - Gypsum-Calcite
Luster:
Vitreous (Glassy)
Streak:
blue
Optical Properties of Mrazekite
Gladstone-Dale:
CI meas = -0.006 (Superior) - where the CI = (1-KPDmeas /KC ) CI calc = 0.018 (Superior) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.1703,KPDmeas = 0.1745,KC = 0.1735 Ncalc = 1.85 - 1.87
Optical Data:
Biaxial (-), a=1.8, b=1.86-1.87, g=1.9, bire=0.1000
Calculated Properties of Mrazekite
Electron Density:
Bulk Density (Electron Density)=4.36 gm/cc note: Specific Gravity of Mrazekite =4.90 gm/cc.
Fermion Index:
Fermion Index = 0.0001208559 Boson Index = 0.9998791441
Photoelectric:
PEMrazekite = 849.08 barns/electronU=PEMrazekite x r Electron Density=3,705.04 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Mrazekite is Not Radioactive
Mrazekite Classification
Dana Class:
42.04.15.01 (42) Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
(42.04) where (AB)5 (XO4)2 Zq � x(H2O)
(42.04.15) Dana Group
42.04.15.01 Mrazekite Bi2Cu3(PO4)2O2(OH)2•2(H2O) P 21 /n 2/m
Strunz Class:
08.DJ.40 08 - PHOSPHATES, ARSENATES, VANADATES
08.D - Phosphates, etc
08.DJ -With large and medium-sized cations, (OH, etc.):RO4 = 1:l
08.DJ.40 Mrazekite Bi2Cu3(PO4)2O2(OH)2•2(H2O) P 21 /n 2/m
Other Mrazekite Information
References:
NAME( Dana8) PHYS. PROP.(Bull.Miner.,Vol.107-111,1984-1988) OPTIC PROP.(Bull.Miner.,Vol.107-111,1984-1988)
See Also:
Links to other databases for Mrazekite :
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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Mrazekite
Bi+++2Cu++3(PO4)2O2(OH)2•2(H2O)
Dana No: 42.04.15.01 Strunz No: 08.DJ.40
Locality:
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