Bleasdaleite Mineral Data

Bleasdaleite Mineral Data

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General Bleasdaleite Information

Chemical Formula:

(Ca,Fe+++)2Cu5(Bi,Cu)(PO4 )4(H2O,OH,Cl)13

Composition:

Molecular Weight = 1,047.70 gm

Calcium 6.12 % Ca 8.56 % CaO

Iron 2.13 % Fe 3.05 % Fe₂O₃

Copper 31.54 % Cu 35.51 % Cu₂O

Bismuth 1.60 % Bi 1.78 % Bi₂O₃

Phosphorus 11.83 % P 27.10 % P₂O₅

Hydrogen 1.94 % H 17.37 % H₂O

Chlorine 1.02 % Cl 1.02 % Cl

- % Cl -0.23 % -O=Cl₂

Oxygen 43.83 % O

______ ______

100.00 % 94.15 % = TOTAL OXIDE

Empirical Formula:

Ca_1.6Fe³⁺_0.4Cu₅Bi_0.08Cu_0.2(PO₄)₄(H₂O)_7.5(OH)_5.2Cl_0.3

Environment:

In a pegmatite associated with other secondary minerals. The Bi P-dominant analogue of rechelsdorfite

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Granite quarry 10 km SSW of the township of Lake Boga, northern Victoria, Australia. Link to MinDat.org Location Data.

Name Origin:

For the Reverend John Ignatius Bleasdale (1822-1884), an enthusiastic proponent of minerals from Victoria.

Synonym:

IMA1998-003a

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Bleasdaleite Crystallography

Axial Ratios:

a:b:c =1.0266:1:1.0823

Cell Dimensions:

a = 14.2, b = 13.832, c = 14.971, Z = 4; beta = 102.08° V = 2,875.41 Den(Calc)= 2.42

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 14.57(1)(001), 2.816(0.4)(043), 6.28(0.4)(112,021),6.95(0.4)(200), 2.452(0.3)(440), 2.506(0.3)(152,243), 3.104(0.3)(402), 3.469(0.3)(312,400),

Physical Properties of Bleasdaleite

Cleavage:

[001] Very Good

Color:

Honey brown, Dark brown.

Diaphaniety:

Translucent

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Scaly - Morphology like fish scales.

Hardness:

2 - Gypsum

Luster:

Resinous

Streak:

pale brown

Optical Properties of Bleasdaleite

Gladstone-Dale:

CI calc= -0.354 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.305,KC= 0.2252

Optical Data:

Biaxial (-), a=1.718, b=1.748, g=1.748, bire=0.0300

Calculated Properties of Bleasdaleite

Electron Density:

r_electron=2.38 gm/cc
note: r_Bleasdaleite=2.42 gm/cc.

Fermion Index

Fermion Index = 0.00074
Boson Index = 0.99926

Photoelectric:

PE_Bleasdaleite= 41.75 barns/electron
U=PE_Bleasdaleite x r_electron= 99.27 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bleasdaleite is Not Radioactive

Bleasdaleite Classification

Dana Class:

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

(42.7)where (AB)5 (XO4)3 Zq · x(H2O)

(42.7.15)Dana Group

42.7.15.1 Richelsdorfite Ca2Cu5Sb(AsO4)4Cl(OH)6·6(H2O) C 2/m 2/m

42.7.15.2 Bleasdaleite ! (Ca,Fe)2Cu5(Bi,Cu)(PO4)4(H2O,OH,Cl)13 C 2/m 2/m

Strunz Class:

VII/D.54-05 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.54 - Richelsdorfite - Clinotyrolite series

VII/D.54-05 Bleasdaleite (Ca,Fe)2Cu5(Bi,Cu)(PO4)4(H2O,OH,Cl)13 C 2/m 2/m

VII/D.54-10 Richelsdorfite Ca2Cu5Sb(AsO4)4Cl(OH)6·6(H2O) C 2/m 2/m

VII/D.54-20 Tyrolite CaCu5(AsO4)2(CO3)(OH)4·6(H2O) Pmma 2/m 2/m 2/m

VII/D.54-30 Clinotyrolite Ca2Cu9[(As,S)O4]4(OH)10·10(H2O) P 2/a 2/m

Other Bleasdaleite Information

References:

NAME( MinRec, v 32, p 210) PHYS. PROP.(CanMin, Vol 38) OPTIC PROP.(MinRec, v 32, p 210)

See Also:

Links to other databases for Bleasdaleite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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Print or Cut-and-Paste your Bleasdaleite Specimen Label here :

Bleasdaleite

(Ca,Fe+++)2Cu5(Bi,Cu)(PO4 )4(H2O,OH,Cl)13
Dana No: 42.7.15.2 Strunz No: VII/D.54-05
Locality:

Notes: