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Ludjibaite

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Shituru Mine, Likasi, Central area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)
© Brent Thorne

Show Ludjibaite Photos (5)
Formula:
Cu
 
5
[(OH)
 
2
|PO
 
4
]
 
2
System:TriclinicColour:Blue-green
Lustre:Vitreous
Polymorph of:Pseudomalachite, Reichenbachite
This page provides mineralogical data about Ludjibaite.

Classification of Ludjibaite

IMA status:Approved 1987
Strunz 8th edition ID:7/B.11-10
Nickel-Strunz 10th (pending) edition ID:8.BD.25

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
D : With only medium-sized cations, (OH, etc.):RO4= 2:1
Dana 8th edition ID:41.4.3.3

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
4 : (AB)5(XO4)2Zq
Hey's CIM Ref.:19.2.4

19 : Phosphates
2 : Phosphates of Cu
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Type Occurrence of Ludjibaite

Type Locality:Ludjiba Mts, Shinkolobwe, Central area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)
Year of Discovery:1988

Physical Properties of Ludjibaite

Lustre:Vitreous
Colour:Blue-green

Crystallography of Ludjibaite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 4.44Å, b = 5.87Å, c = 8.68Å
α = 103.9°, β = 90.3°, γ = 93.2°
Ratio:a:b:c = 0.756 : 1 : 1.479
Unit Cell Volume:V 219.22 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
4.46 (100)
3.02 (20)
2.462 (50)
2.408 (20)
2.353 (50)
2.017 (20)

Optical Data of Ludjibaite

Type:Biaxial (+/-)
RI values: nα = 1.786 nγ = 1.840
Maximum Birefringence:δ = 0.054

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:extreme

Chemical Properties of Ludjibaite

Formula:
Cu
 
5
[(OH)
 
2
|PO
 
4
]
 
2
Essential elements:Cu, H, O, P
All elements listed in formula:Cu, H, O, P

Relationship of Ludjibaite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.BD.05Cornwallite
Cu
 
5
[(OH)
 
2
|AsO
 
4
]
 
2
8.BD.05Pseudomalachite
Cu
 
5
[(OH)
 
2
|PO
 
4
]
 
2
8.BD.05Reichenbachite
Cu
 
5
[(OH)
 
2
|PO
 
4
]
 
2
8.BD.10Arsenoclasite
Mn
2+
5
[(OH)
 
2
|AsO
 
4
]
 
2
8.BD.10Gatehouseite
Mn
2+
5
[(OH)
 
2
|PO
 
4
]
 
2
8.BD.15Parwelite
Mn
 
10
Sb
 
2
As
 
2
Si
 
2
O
 
24
8.BD.20Reppiaite
Mn
2+
5
[(OH)
 
2
|VO
 
4
]
 
2
8.BD.30Cornubite
Cu
 
5
[(OH)
 
2
|AsO
 
4
]
 
2
Related Minerals - Hey's Index Grouping:

- +
19.2.1Libethenite
Cu
 
2
[OH|PO
 
4
]
19.2.2Cornetite
Cu
 
3
[(OH)
 
3
|PO
 
4
]
19.2.3Reichenbachite
Cu
 
5
[(OH)
 
2
|PO
 
4
]
 
2
19.2.5Pseudomalachite
Cu
 
5
[(OH)
 
2
|PO
 
4
]
 
2
19.2.6Nissonite
Cu
 
2
Mg
 
2
[OH|PO
 
4
]
 
2
 · 5H
 
2
O
19.2.7Zapatalite
Cu
 
3
Al
 
4
[(OH)
 
3
|PO
 
4
]
 
3
 · 4H
 
2
O
19.2.8Turquoise
Cu(Al,Fe
3+
 
)
 
6
[(OH)
 
4
|(PO
 
4
)
 
2
]
 
2
 · 4H
 
2
O
19.2.9Sieleckiite
Cu
 
3
Al
 
4
[(OH)
 
6
|PO
 
4
]
 
2
 · 2H
 
2
O
19.2.10Planerite
Al
 
6
[(OH)
 
4
|HPO
 
4
|PO
 
4
]
 
2
 · 4 H
 
2
O
19.2.11Hentschelite
CuFe
3+
2
[OH|PO
 
4
]
 
2
19.2.13Chalcosiderite
Cu(Fe
3+
 
,Al)
 
6
[(OH)
 
4
|(PO
 
4
)
 
2
]
 
2
 · 4H
 
2
O
19.2.14Phosphofibrite
[K
 
<0.5
(H
 
2
O)
 
3
][(Fe
3+
 
,Cu)
 
8
(PO
 
4
)
 
6
(OH)
 
7
(H
 
2
O)
 
4
]

Other Names for Ludjibaite

Synonyms:
IMA1987-009
Other Languages:
German:Ludjibait
Spanish:Ludjibaita

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 Ludjibaite

Reference List:American Mineralogist (1981): 66: 169-175.

American Mineralogist (1988): 73: 1495.

Neues Jahrbuch für Mineralogie, Monatshefte (1991): 281.

Internet Links for Ludjibaite

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    Localities for Ludjibaite

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