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Mahnertite

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Big Photo

Cap Garonne Mine, Le Pradet, Var, Provence-Alpes-Côte d'Azur, France
© Stephan Wolfsried

Show Mahnertite Photos (6)



Formula:
NaCu
 
3
(AsO
 
4
)
 
2
Cl · 5H
 
2
O
System:TetragonalLustre:Vitreous
Hardness:2 - 3
Name:Named after Volker Mahnert (b. 1943), zoologist, Director of the Muséum d’Histoire Naturelle, Geneva, Switzerland.


Structurally related to Zdenekite and other members of the Lavendulan Group.

Classification of Mahnertite

IMA status:Approved 1994
Strunz 8th edition ID:7/D.25-27
Nickel-Strunz 10th (pending) edition ID:8.DH.45

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
H : With large and medium-sized cations, (OH, etc.):RO4 < 1:1
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Type Occurrence of Mahnertite

Type Locality:Cap Garonne Mine, Le Pradet, Var, Provence-Alpes-Côte d'Azur, France
Year of Discovery:1995

Physical Properties of Mahnertite

Lustre:Vitreous
Hardness (Mohs):2 - 3

Crystallography of Mahnertite

Crystal System:Tetragonal
Class (H-M):4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:I4/mmm {I4/m 2/m 2/m}
Cell Parameters:a = 10.037Å, c = 23.739Å
Ratio:a:c = 1 : 2.365
Unit Cell Volume:V 2391.5 ų
Z:8
Morphology:Thin pseudotetragonal plates.
X-Ray Powder Diffraction:
d-spacingIntensity
11.90 (100)
9.29 (60)
7.131 (50)
5.043 (60)
4.641 (40)
3.098 (80)
3.061 (70)

Optical Data of Mahnertite

Type:Uniaxial (-)
RI values: nω = 1.686 nε = 1.635
Maximum Birefringence:δ = 0.051

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

Chemical Properties of Mahnertite

Formula:
NaCu
 
3
(AsO
 
4
)
 
2
Cl · 5H
 
2
O
Essential elements:As, Cl, Cu, H, Na, O
All elements listed in formula:As, Cl, Cu, H, Na, O

Relationship of Mahnertite to other Species

Structurally related to group(s):
Lavendulan Group
Related Minerals - Nickel-Strunz Grouping):

- +
8.DH.05Minyulite
KAl
 
2
(PO
 
4
)
 
2
(OH,F) · 4H
 
2
O
8.DH.10Leucophosphite
KFe
3+
2
(PO
 
4
)
 
2
(OH) · 2H
 
2
O
8.DH.10Spheniscidite
(NH
 
4
,K)(Fe
3+
 
,Al)
 
2
(PO
 
4
)
 
2
(OH) · 2H
 
2
O
8.DH.10Tinsleyite
KAl
 
2
(PO
 
4
)
 
2
(OH) · 2H
 
2
O
8.DH.15Jahnsite-(CaMnFe)
{Ca}{Mn
2+
 
}{Fe
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
8.DH.15Jahnsite-(CaMnMg)
{Ca}{Mn
2+
 
}{(Mg,Fe
2+
 
)
 
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
8.DH.15Jahnsite-(CaMnMn)
{Ca}{Mn
2+
 
}{Mn
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
8.DH.15Keckite
CaMn
2+
 
Fe
3+
2
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
3
(H
 
2
O)
 
7
8.DH.15Rittmannite
{(Mn
2+
 
,Ca)}{Mn
2+
 
}{(Fe
2+
 
,Mn
2+
 
,Mg)
 
2
}{(Al,Fe
3+
 
)
 
2
}(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
8.DH.15Whiteite-(CaFeMg)
{Ca}{(Fe
2+
 
,Mn
2+
 
)}{Mg
 
2
}{Al
 
2
}(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
8.DH.15Whiteite-(CaMnMg)
{Ca}{Mn
2+
 
}{Mg
 
2
}{Al
 
2
}(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
8.DH.15Whiteite-(MnFeMg)
{(Mn
2+
 
,Ca)}{(Fe
2+
 
,Mn
2+
 
)}{Mg
 
2
}{Al
 
2
}(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
8.DH.15Jahnsite-(MnMnMn)
{Mn
2+
 
}{Mn
2+
 
}{Mn
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
8.DH.15Kaluginite
(Mn
2+
 
,Ca)MgFe
3+
 
(PO
 
4
)
 
2
(OH) · 4H
 
2
O
8.DH.15Jahnsite-(CaFeFe)
{Ca}{Fe
2+
 
}{Fe
2+
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
8.DH.15Jahnsite-(NaFeMg)
{Na}{Fe
3+
 
}{Mg
 
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
8.DH.15Jahnsite-(NaMnMg)
{Na}{Mn
3+
 
}{Mg
 
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
8.DH.15Jahnsite-(CaMgMg)
{Ca}{Mg}{Mg
 
2
}{Fe
3+
2
}(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
8.DH.20Manganosegelerite
(Mn
2+
 
,Ca)(Mn
2+
 
,Fe
2+
 
,Mg)Fe
3+
 
(PO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DH.20Overite
CaMgAl(PO
 
4
)
 
2
(OH) · 4H
 
2
O
8.DH.20Segelerite
Ca
 
2
 Mg
 
2
 Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
 · 8H
 
2
O
8.DH.20Wilhelmvierlingite
CaMnFe
3+
 
(PO
 
4
)
 
2
(OH) · 2H
 
2
O
8.DH.20Juonniite
CaMgSc(PO
 
4
)
 
2
(OH) · 4H
 
2
O
8.DH.25Calcioferrite
Ca
 
2
Fe
3+
2
(PO
 
4
)
 
3
(OH) · 7H
 
2
O
8.DH.25Kingsmountite
Ca
 
4
(Fe
2+
 
,Mn
2+
 
)Al
 
4
(PO
 
4
)
 
6
(OH)
 
4
 · 12H
 
2
O
8.DH.25Montgomeryite
Ca
 
4
MgAl
 
4
(PO
 
4
)
 
6
(OH)
 
4
 · 12H
 
2
O
8.DH.25Zodacite
Ca
 
4
Mn
2+
 
Fe
3+
4
(PO
 
4
)
 
6
(OH)
 
4
 · 12H
 
2
O
8.DH.30Arseniosiderite
Ca
 
2
Fe
3+
3
(AsO
 
4
)
 
3
O
 
2
 · 3H
 
2
O
8.DH.30Kolfanite
Ca
 
2
Fe
3+
2
(AsO
 
4
)
 
3
O
 
2
 · 2H
 
2
O
8.DH.30Mitridatite
Ca
 
2
Fe
3+
3
(PO
 
4
)
 
3
O
 
2
 · 3H
 
2
O
8.DH.30Pararobertsite
Ca
 
2
Mn
3+
3
(PO
 
4
)
 
3
O
 
2
 · 3H
 
2
O
8.DH.30Robertsite
Ca
 
3
Mn
3+
4
(PO
 
4
)
 
4
(OH)
 
6
 · 3H
 
2
O
8.DH.30Sailaufite
(Ca,Na,☐)
 
2
Mn
3+
3
(AsO
 
4
)
 
2
(CO
 
3
)O
 
2
 · 3H
 
2
O
8.DH.35Mantienneite
KMg
 
2
Al
 
2
Ti(PO
 
4
)
 
4
(OH)
 
3
 · 15H
 
2
O
8.DH.35Paulkerrite
K(Mg,Mn
2+
 
)
 
2
(Fe
3+
 
,Al,Ti,Mg)
 
2
Ti(PO
 
4
)
 
4
(OH)
 
3
 · 15H
 
2
O
8.DH.35Benyacarite
(H
 
2
O,K)
 
2
(Mn
2+
 
,Fe
2+
 
)
 
2
(Fe
3+
 
,Ti)
 
2
Ti(PO
 
4
)
 
4
(O,F)
 
2
 · 14H
 
2
O
8.DH.40Xanthoxenite
Ca
 
4
Fe
3+
2
(PO
 
4
)
 
4
(OH)
 
2
 · 3H
 
2
O
8.DH.50Andyrobertsite
KCdCu
 
5
(AsO
 
4
)
 
4
(H
 
2
AsO
 
4
) · 2H
 
2
O
8.DH.50Calcioandyrobertsite
KCaCu
 
5
(AsO
 
4
)
 
4
(H
 
2
AsO
 
4
) · 2H
 
2
O
8.DH.55Englishite
K
 
3
Na
 
2
Ca
 
10
Al
 
15
(PO
 
4
)
 
21
(OH)
 
7
 · 26H
 
2
O
8.DH.60Bouazzerite
Bi
 
6
(Mg,Co)
 
11
Fe
3+
14
(AsO
 
4
)
 
18
(OH)
 
4
O
 
12
 · 86H
 
2
O

Other Names for Mahnertite

Synonyms:
IMA1994-035
Other Languages:
German:Mahnertit
Russian:Манерит
Spanish:Mahnertita

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 Mahnertite

Reference List:

- +
Sarp, H. (1996), "Mahnertite, (Na,Ca)Cu(AsO4)4Cl.5H2O, a new mineral from the Cap Garonne Mine, Var France", Archs. Sci. Genève 49(2):119-124 (in French, with English abstract).

Wendel,W. & Markl,G. (1999): Lavrion: Mineralogische Klassiker und Raritäten für Sammler. Lapis, 24(7), 34.

Rieck,B. (1999): Seltene Arsenate aus der Kamariza und weitere Neufunde aus Lavrion. Lapis, 24(7), 68

Mineralogical Record: 28: 486.

Pushcharovsky, D. Yu., Zubkova, N.V., Teat, S.J., MacLean, E.J., and Sarp, H. (2004) Crystal structure of mahnertite. European Journal of Mineralogy: 16: 687-692.

Giester, Gerald; Uwe Kolitsch; Peter Leverett; Peter Turner; Peter A. Williams (2007): The crystal structures of lavendulan, sampleite, and a new polymorph of sampleite. European Journal of Mineralogy 19,75-93.

Internet Links for Mahnertite

Search Engines:
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    • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mahnertite details from Handbook of Mineralogy (PDF)
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    • Localities for Mahnertite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    France
     
    • Provence-Alpes-Côte d'Azur
      • Var
        • Le Pradet
    		H. Sarp: Archs. Sci. Genève 49(2):119-124 (1996)
    Greece
     
    • Attikí (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
        • Lavrion District Mines
          • Agios Konstantinos [St Constantine] (Kamariza)
            • Kamariza Mines (Kamareza Mines)
    		Lapis, 24(7), 34 (1999); Lapis, 24(7), 68 (1999)
    Lapis No.7/8 1999 p.70-74
    Mineral and/or Locality
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