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Mrázekite

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Formula:
Bi
 
2
Cu
 
3
(PO
 
4
)
 
2
O
 
2
(OH)
 
2
· H
 
2
O
System:MonoclinicColour: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

IMA status:Approved 1990
Strunz 8th edition ID:7/D.53-100
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:42.4.15.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
4 : (AB)5(XO4)2Zq·xH2O
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Type Occurrence of Mrázekite

Type Locality:Podlipa deposit, Ľubietová (Libetbánya; Libethen), Banská Bystrica Co., Banská Bystrica Region, Slovakia
Place of Conservation of Type Material:Charles University, Prague

Occurrences of Mrázekite

Geological Setting:Oxidized zone of polymetallic sulfide deposits.

Physical Properties of Mrázekite

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

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°
Maximum Birefringence:δ = 0.100

Chart 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:
Bi
 
2
Cu
 
3
(PO
 
4
)
 
2
O
 
2
(OH)
 
2
· H
 
2
O
Simplified for copy/paste:Bi2Cu3(PO4)2O2(OH)2·H2O
Essential elements:Bi, Cu, H, O, P
All elements listed in formula:Bi, Cu, H, O, P

Relationship of Mrázekite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.DJ.05Johnwalkite
K(Mn
2+
 
,Fe
2+
 
,Fe
3+
 
)
 
2
(Nb
5+
 
,Ta
5+
 
)(PO
 
4
)
 
2
O
 
2
· 2(H
 
2
O,OH)
8.DJ.05Olmsteadite
KFe
2+
2
(Nb
5+
 
,Ta
5+
 
)(PO
 
4
)
 
2
O
 
2
· 2H
 
2
O
8.DJ.10Gatumbaite
CaAl
 
2
(PO
 
4
)
 
2
(OH)
 
2
· H
 
2
O
8.DJ.15Camgasite
CaMg(AsO
 
4
)(OH) · 5H
 
2
O
8.DJ.20Phosphofibrite
K
 
<0.5
(Fe
3+
 
,Cu)
 
8
(PO
 
4
)
 
6
(OH)
 
7
· 7H
 
2
O
8.DJ.20Meurigite-K
KFe
3+
8
(PO
 
4
)
 
6
(OH)
 
7
· 6.5H
 
2
O
8.DJ.20Meurigite-Na
NaFe
3+
8
(PO
 
4
)
 
6
(OH)
 
7
· 6.5H
 
2
O
8.DJ.25Jungite
Ca
 
2
Zn
 
4
Fe
3+
8
(PO
 
4
)
 
9
(OH)
 
9
· 16H
 
2
O
8.DJ.30Wycheproofite
NaAlZr(PO
 
4
)
 
2
(OH) · H
 
2
O
8.DJ.35Ercitite
Na
 
2
Mn
3+
2
(PO
 
4
)
 
2
(OH)
 
2
· 4H
 
2
O
8.DJ.45Attikaite
Ca
 
3
Cu
 
2
Al
 
2
(AsO
 
4
)
 
4
(OH)
 
4
· 2H
 
2
O

Other Names for Mrázekite

Synonyms:
IMA1990-045
Other Languages:
German:Mrázekit
Russian:Мразекит
Spanish:Mrázekita

Other Information

Health Warning: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

Search Engines:
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  • External Links:
  • Look for Mrázekite on Webmineral
  • Look for Mrázekite on Athena Mineralogy
  • Look for Mrázekite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mrázekite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Localities for Mrázekite

    The 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. ? 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.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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