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Mrázekite

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Formula:
Bi2Cu3(PO4)2O2(OH)2 · H2O
System:
Monoclinic
Colour:
Cerulean blue
Hardness:
2 - 3
Name:
For Zdenek Mrázek (1952-1984), a Czech mineralogist who first collected the species.
This page provides mineralogical data about Mrázekite.

Classification of Mrázekite

Approved 1990
7/D.53-100
8.DJ.40

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
J : With large and medium-sized cations, (OH, etc.):RO4 = 1:1
42.4.15.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
4 : (AB)5(XO4)2Zq·xH2O
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http://www.mindat.org/min-2801.html
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First Recorded Occurrence of Mrázekite

Place of Conservation of First Recorded Material:
Charles University, Prague

Occurrences of Mrázekite

Geological Setting:
Oxidized zone of polymetallic sulfide deposits.

Physical Properties of Mrázekite

Vitreous
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Cerulean blue
Streak:
light blue
Hardness (Mohs):
2 - 3
Cleavage:
Distinct/Good
201
Density:
4.90(2) g/cm3 (Measured)    5.00 g/cm3 (Calculated)

Crystallography of Mrázekite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 9.065(1) Å, b = 6.340(1) Å, c = 5.410(3) Å
β = 101.57(1)°
Ratio:
a:b:c = 1.43 : 1 : 0.853
Unit Cell Volume:
V 304.61 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Acicular to slender bladed crystals. Wedgelike terminations, rosettes or spherules of radial acicular crystals, crusts.

Optical Data of Mrázekite

Type:
Biaxial (-)
RI values:
nα = 1.800 nβ = 1.860 - 1.870 nγ = 1.900
2V:
Measured: 66° to 68°
Max Birefringence:
δ = 0.100
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r < v strong
Pleochroism:
Weak
Comments:
in ink blue tints

Chemical Properties of Mrázekite

Formula:
Bi2Cu3(PO4)2O2(OH)2 · H2O
Essential elements:
All elements listed in formula:

Relationship of Mrázekite to other Species

8.DJ.05JohnwalkiteK(Mn2+,Fe2+,Fe3+)2(Nb5+,Ta5+)(PO4)2O2 · 2(H2O,OH)
8.DJ.05OlmsteaditeKFe22+(Nb5+,Ta5+)(PO4)2O2 · 2H2O
8.DJ.10GatumbaiteCaAl2(PO4)2(OH)2 · H2O
8.DJ.15CamgasiteCaMg(AsO4)(OH) · 5H2O
8.DJ.20PhosphofibriteK<0.5(Fe3+,Cu)8(PO4)6(OH)7 · 7H2O
8.DJ.20Meurigite-KKFe83+(PO4)6(OH)7 · 6.5H2O
8.DJ.20Meurigite-NaNaFe83+(PO4)6(OH)7 · 6.5H2O
8.DJ.25JungiteCa2Zn4Fe83+(PO4)9(OH)9 · 16H2O
8.DJ.30WycheproofiteNaAlZr(PO4)2(OH) · H2O
8.DJ.35ErcititeNa2Mn23+(PO4)2(OH)2 · 4H2O
8.DJ.45AttikaiteCa3Cu2Al2(AsO4)4(OH)4 · 2H2O

Other Names for Mrázekite

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Mrázekite

Reference List:
New Minerals (1997), New Minerals 1990-1994.

Canadian Mineralogist (1992): 215-224.

Canadian Mineralogist (1994): 32: 365-372.

Internet Links for Mrázekite

Localities for Mrázekite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Australia
 
  • Victoria
    • Benambra
      • Morass Creek gorge
Mineralogical Record: 29: 164.
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
Lapis 2002(7/8), 63-65
France
 
  • Alsace
    • Haut-Rhin
      • Ste Marie-aux-Mines (Markirch)
Le cahier des micromnteurs, 1998, 1, pp 27-28; Chiappero, P.-J., Forner, H., Lefevre, M., Meisser, N., and Moreau, F. (1995): Mrazekit aus Brézouard, Dépt. Bas-Rhin. Lapis, 20, 21 (in German).
Paul De Bondt.
Germany
 
  • Hesse
    • Odenwald
      • Lautertal (Odenwald)
        • Gadernheim
No reference listed
        • Reichenbach
          • Hohenstein
No reference listed
No reference listed
  • Thuringia
    • Vogtland
      • Hirschberg
        • Ullersreuth
T. Witzke et al.: Lapis 2001(12), 13-27
Portugal
 
  • Viseu District
    • Sátão
      • Ferreira de Aves
        • Aldeia Nova
César Menor-Salván (2012) Mrázekita, Bi2Cu3(PO4)2O2(OH)2·2H2O, de la mina Assunçao (Aldeia Nova, Ferreria de Aves, Viseu, Portugal). ACOPIOS-Revista Ibérica de Mineralogía, Vol 3 (2012): 21-25.
Romania
 
  • Caraş-Severin Co.
    • Banat Mts
      • Moldova Nouă-Sasca Cu-Mo ore field
No reference listed
Slovakia
 
  • Banská Bystrica Region
    • Banská Bystrica Co.
      • Ľubietová (Libetbánya; Libethen)
Řídkošil, T., Šrein, V., Fábry, J., Hybler, J., Maximov, B. A. (1992): Mrázekite, Bi2Cu3(OH)2O2(PO4).2H2O, a new mineral species and its crystal structure. Canad. Mineral., 30, 215-224.
Mineral and/or Locality  
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