Ludjibaite Mineral Data

Ludjibaite Mineral Data +

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General Ludjibaite Information

Chemical Formula:

Cu5(PO4)2(OH)4

Composition:

Molecular Weight = 575.70 gm

Copper 55.19 % Cu 69.09 % CuO

Phosphorus 10.76 % P 24.66 % P₂O₅

Hydrogen 0.70 % H 6.26 % H₂O

Oxygen 33.35 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₅(PO₄)₂(OH)₄

IMA Status:

Approved IMA 1988

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 100744

PDF 46-1300

Ludjibaite Image

Images:

Ludjibaite

Comments: Coating of intense blue-green microcrystals and crystalline ludjibaite.
Location: Shituru, Shaba, Zaire. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ludjibaite Crystallography

Axial Ratios:

a:b:c =0.7572:1:1.4784

Cell Dimensions:

a = 4.446, b = 5.871, c = 8.68, Z = 1; alpha = 103.9°, beta = 90.3°, gamma = 93.2° V = 219.59 Den(Calc)= 4.35

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 4.46(1), 2.353(0.5), 2.462(0.5),

Physical Properties of Ludjibaite

Cleavage:

None

Color:

Blue green.

Diaphaniety:

Translucent to Opaque

Luster:

Vitreous (Glassy)

Streak:

bluish white

Optical Properties of Ludjibaite

Gladstone-Dale:

CI calc= -0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1869,KC= 0.1838

Optical Data:

Biaxial (+/-), a=1.786, g=1.84, bire=0.0540

Calculated Properties of Ludjibaite

Electron Density:

r_electron=4.16 gm/cc
note: r_Ludjibaite=4.35 gm/cc.

Fermion Index

Fermion Index = 0.00016
Boson Index = 0.99984

Photoelectric:

PE_Ludjibaite= 24.87 barns/electron
U=PE_Ludjibaite x r_electron= 103.34 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ludjibaite is Not Radioactive

Ludjibaite Classification

Dana Class:

41.4.3.3 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.4)where (A B)5 (XO4)2 Zq

(41.4.3)Dana Group

41.4.3.1 Pseudomalachite Cu5(PO4)2(OH)4 P 2₁/a 2/m

41.4.3.2 Reichenbachite Cu5(PO4)2(OH)4 P 2₁/a 2/m

41.4.3.3 Ludjibaite Cu5(PO4)2(OH)4 P1 1

Strunz Class:

VII/B.11-10 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O,OH, cations of medium size: Mg, Mn, Fe, Cu, Zn, Pseudomalachite group and related compounds

VII/B.11 - Pseudomalachite group, Ludjibaite - Reppiaite series

VII/B.11-10 Ludjibaite Cu5(PO4)2(OH)4 P1 1

VII/B.11-20 Pseudomalachite Cu5(PO4)2(OH)4 P 2₁/a 2/m

VII/B.11-30 Reichenbachite Cu5(PO4)2(OH)4 P 2₁/a 2/m

VII/B.11-40 Cornwallite Cu5(AsO4)2(OH)4 P 2₁/a 2/m

VII/B.11-50 Cornubite Cu5(AsO4)2(OH)4 P1 1

VII/B.11-60 Turanite Cu5(VO4)2(OH)4 P1 1

VII/B.11-65 Gatehouseite Mn5(PO4)2(OH)4 P 2₁2₁2₁ 2 2 2

VII/B.11-70 Arsenoclasite Mn5(AsO4)2(OH)4 P 2₁2₁2₁ 2 2 2

VII/B.11-80 Reppiaite Mn5[(V,As)O4]2(OH)4 C 2/m 2/m

Other Ludjibaite Information

References:

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 Ludjibaite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 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 12 -École des Mines de Paris

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Ludjibaite

Cu5(PO4)2(OH)4
Dana No: 41.4.3.3 Strunz No: VII/B.11-10
Locality:

Notes: