Mrazekite Mineral Data

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 % Bi₂O₃

Phosphorus 6.88 % P 15.76 % P₂O₅

Hydrogen 0.67 % H 6.00 % H₂O

Oxygen 24.87 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Bi₂Cu₃(PO₄)₂O₂(OH)₂·2(H₂O)

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.

Synonym:

ICSD 79140

IMA1990-045

PDF 47-1787

Mrazekite Image

Images:

Mrazekite

Comments: Blue, prismatic crystal of mr?zekite 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 - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.04(1), 2.924(0.83), 7.625(0.78),

Crystal Structure:

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Ridkosil T , Srein V , Fabry J , Hybler J , Maximov B A , The Canadian Mineralogist , 30 (1992) p.215-224, Mrazekite, Bi2Cu3(OH)2O2(PO4)2.2H2O, a new mineral species, and its crystal structure

View Additional jPOWD Structure files for Mrazekite
[1]

Physical Properties of Mrazekite

Cleavage:

[???] Good

Color:

Blue, Cerulean blue.

Density:

4.9

Diaphaniety:

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

Optical Data:

Biaxial (-), a=1.8, b=1.86-1.87, g=1.9, bire=0.1000

Calculated Properties of Mrazekite

Electron Density:

r_electron=4.36 gm/cc
note: r_Mrazekite=4.90 gm/cc.

Fermion Index

Fermion Index = 0.00012
Boson Index = 0.99988

Photoelectric:

PE_Mrazekite= 849.08 barns/electron
U=PE_Mrazekite x r_electron=3,705.04 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Mrazekite is Not Radioactive

Mrazekite Classification

Dana Class:

42.4.15.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.4)where (AB)5 (XO4)2 Zq · x(H2O)

(42.4.15)Dana Group

42.4.15.1 Mrazekite Bi2Cu3(PO4)2O2(OH)2·2(H2O) P 2₁/n 2/m

Strunz Class:

VII/D.53-100 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of very big and medium size: Al, Mg and Ca, Na, K

VII/D.53 - Mixite - Agardite group

VII/D.53-10 Petersite-(Y) (Y,Ce,Nd,Ca)Cu6(PO4)3(OH)6·3(H2O) P 6₃/m 6/m

VII/D.53-20 Goudeyite (Al,Y)Cu6(AsO4)3(OH)6·3(H2O) Unk Hex

VII/D.53-30 Zalesiite! (Ca,Y)Cu6[(AsO4)2(AsO3OH)(OH)6]·3(H2O) P 6₃/m 6/m

VII/D.53-40 Agardite-(Y) (Y,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

VII/D.53-50 Agardite-(La)! (La,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

VII/D.53-60 Agardite-(Ce)! (Ce,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

VII/D.53-70 Agardite-(Nd)! (Pb,Nd,Y,La,Ca)Cu6(AsO4)3(OH)6·3(H2O) 6/m

VII/D.53-80 Agardite-(Dy)! (Dy,La,Ca)Cu6(AsO4)3(OH)6·3(H2O) 6/m

VII/D.53-90 Mixite BiCu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

VII/D.53-95 Juanitaite! (Cu,Ca,Fe)10Bi(AsO4)4(OH)11·2(H2O) P 4₁/nnm 4/m 2/m 2/m

VII/D.53-100 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)

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Mrazekite

Bi+++2Cu++3(PO4)2O2(OH)2·2(H2O)
Dana No: 42.4.15.1 Strunz No: VII/D.53-100
Locality:

Notes: