Ludjibaite Mineral Data

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

Environment:

Rare mineral in the oxidized zone of some copper deposits.

IMA Status:

Approved IMA 1988

Locality:

Ludjiba mine, about 12 km southeast of Kambove, Katanga Province, Congo (Shaba Province, Zaire). Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Ludjibaite + Pronunciation

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

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

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

Crystal Structure:

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Shoemaker G L , Anderson J B , Kostiner E , American Mineralogist , 66 (1981) p.169-175, The crystal structure of a third polymorph of Cu5(PO4)2(OH)4, Note: related to pseudomalachite and ludjibaite

Physical Properties of Ludjibaite

Color:

Blue green.

Optical Properties of Ludjibaite

Gladstone-Dale:

CI calc= -0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1869,KC= 0.1838
Ncalc = 1.8

Calculated Properties of Ludjibaite

Electron Density:

Bulk Density (Electron Density)=4.16 gm/cc
note: Specific Gravity of Ludjibaite =4.35 gm/cc.

Fermion Index:

Fermion Index = 0.0001611273
Boson Index = 0.9998388727

Photoelectric:

PE_Ludjibaite= 24.87 barns/electron
U=PE_Ludjibaite x rElectron Density= 103.34 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ludjibaite is Not Radioactive

Ludjibaite Classification

Dana Class:

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

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

(41.04.03)Dana Group

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

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

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

Strunz Class:

08.BD.25 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BD -With only medium-sized cations, (OH, etc.):RO4 = 2:1

08.BD.25 Ludjibaite Cu5(PO4)2(OH)4 P1 1

Other Ludjibaite Information

See Also:

Links to other databases for Ludjibaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Ask about Ludjibaite here :
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Print or Cut-and-Paste your Ludjibaite Specimen Label here :

Ludjibaite

Cu5(PO4)2(OH)4
Dana No: 41.04.03.03 Strunz No: 08.BD.25
Locality:

Notes: