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Davreuxite

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Ottré, Vielsalm, Stavelot Massif, Luxembourg Province, Belgium
© JDehove

Show Davreuxite Photos (4)
Formula:
MnAl
 
6
Si
 
4
O
 
17
(OH)
 
2
System:MonoclinicColour:Creamy-white, pale rose ...
Hardness:2 - 3
This page provides mineralogical data about Davreuxite.

Classification of Davreuxite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/F.33-10
Nickel-Strunz 10th (pending) edition ID:9.BF.15

9 : SILICATES (Germanates)
B : Sorosilicates
F : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in tetrahedral [4] and greater coordination
Dana 8th edition ID:58.1.2.1

58 : SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
1 : Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [4] and higher coordination; single and double groups (n=1, 2)
Hey's CIM Ref.:16.16.3

16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn
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Type Occurrence of Davreuxite

Type Locality:Ottré, Vielsalm, Stavelot Massif, Luxembourg Province, Belgium
Year of Discovery:1878

Physical Properties of Davreuxite

Colour:Creamy-white, pale rose pink
Hardness (Mohs):2 - 3

Crystallography of Davreuxite

Crystal System:Monoclinic
Cell Parameters:a = 9.55Å, b = 5.77Å, c = 12.88Å
β = 116.82°
Ratio:a:b:c = 1.655 : 1 : 2.232
Unit Cell Volume:V 633.39 ų (Calculated from Unit Cell)

Optical Data of Davreuxite

Type:Biaxial (-)
RI values: nα = 1.660 nβ = 1.684 nγ = 1.690
2V:Measured: 48° , Calculated: 52°
Maximum Birefringence:δ = 0.030

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

Chemical Properties of Davreuxite

Formula:
MnAl
 
6
Si
 
4
O
 
17
(OH)
 
2
Essential elements:Al, H, Mn, O, Si
All elements listed in formula:Al, H, Mn, O, Si
Common Impurities:Ti,Fe,Cr,Cu,Zn,Mg,P

Relationship of Davreuxite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.BF.05Harstigite
Ca
 
6
(Mn,Mg)Be
 
4
Si
 
6
(O,OH)
 
24
9.BF.10Samfowlerite
Ca
 
28
Mn
 
6
Zn
 
4
(Be,Zn)
 
4
Be
 
12
[(OH)
 
3
|(SiO
 
4
)
 
3
|(Si
 
2
O
 
7
)
 
2
]
 
4
9.BF.20Queitite
Pb
 
4
Zn
 
2
[SO
 
4
|SiO
 
4
|Si
 
2
O
 
7
]
Related Minerals - Hey's Index Grouping:

- +
16.16.1Kanonaite
Mn
3+
 
Al[O|SiO
 
4
]
16.16.2Spessartine
Mn
2+
3
Al
 
2
[SiO
 
4
]
 
3
16.16.4Sursassite
Mn
 
2
Al
 
3
[(OH)
 
3
|SiO
 
4
|Si
 
2
O
 
7
]
16.16.5Carpholite
Mn
2+
 
Al
 
2
[(OH)
 
4
|Si
 
2
O
 
6
]
16.16.6Kellyite
Mn
2+
2
Al[(OH)
 
4
|AlSiO
 
5
]
16.16.7Pennantite
(Mn
 
5
Al)(Si
 
3
Al)O
 
10
(OH)
 
8
16.16.8Akatoreite
(Mn
2+
 
,Fe
2+
 
)
 
9
Al
 
2
[(OH)
 
3
|HSi
 
4
O
 
13
]
 
2
16.16.9Ganophyllite
(K,Na,Ca)
 
2
Mn
 
8
(Si,Al)
 
12
(O,OH)
 
32
·8H
 
2
O
16.16.10Kôzulite
[Na][Na
 
2
][Mn
2+
4
(Fe
3+
 
,Al)][(OH)
 
2
|Si
 
8
O
 
22
]
16.16.11Masutomilite
(K,Rb)(Li,Mn
3+
 
,Al)
 
3
[(F,OH)
 
2
|AlSi
 
3
O
 
10
]
16.16.13Howieite
Na(Fe,Mn)
 
10
(Fe,Al)
 
2
Si
 
12
O
 
31
(OH)
 
13
16.16.14Eggletonite
(Na,K,Ca)
 
2
(Mn,Fe)
 
8
(Si,Al)
 
12
O
 
29
(OH)
 
7
·11H
 
2
O
16.16.15Bannisterite
Ca
 
0.5
(K,Na)
 
0.5
(Mn,Fe,Zn)
 
10
(Si,Al)
 
16
O
 
38
(OH)
 
8
·5.5H
 
2
O
16.16.16Taneyamalite
(Na,Ca)(Mn,Mg,Fe)
 
12
Si
 
12
(O,OH)
 
44
16.16.17Zussmanite
K(Fe,Mg,Mn)
 
13
(Si,Al)
 
18
O
 
42
(OH)
 
14
16.16.18Coombsite
K(Mn,Fe,Mg)
 
13
(Si,Al)
 
18
O
 
42
(OH)
 
14
16.16.19Henritermierite
Ca
 
3
(Mn
3+
 
,Al)
 
2
[(OH)
 
4
|(SiO
 
4
)
 
2
]
16.16.20Macfallite
Ca
 
2
(Mn
3+
 
,Al)
 
3
[(OH)
 
3
|SiO
 
4
|Si
 
2
O
 
7
]
16.16.21Ottrélite
(Mn
2+
 
,Fe
2+
 
,Mg)Al
 
2
[O|(OH)
 
2
|SiO
 
4
]
16.16.22Piemontite
{Ca
 
2
}{Al
 
2
Mn
3+
 
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]
16.16.23Okhotskite
Ca
 
8
(Mn
2+
 
,Mg)
 
4
(Mn
3+
 
,Al,Fe)
 
8
Si
 
12
O
 
56-n
(OH)
 
n
16.16.24Pumpellyite-(Mn2+)
Ca
 
2
(Mn
2+
 
,Mg)(Al,Mn
3+
 
,Fe
3+
 
)
 
2
[(OH)
 
2
|SiO
 
4
|Si
 
2
O
 
7
] · H
 
2
O
16.16.25Piemontite-(Sr)
{CaSr}{Al
 
2
Mn
3+
 
}[O|OH|SiO
 
4
|Si
 
2
O
 
7
]

Other Names for Davreuxite

Other Languages:
German:Davreuxit
Russian:Даврексит
Spanish:Davreuxita

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 Davreuxite

Reference List:Amer.Mineral., 63, 795.
Bull.Acad.Royale Belg.Sér.II (1878) 46, 240-245.
Bull.Soc.Franç.Minéral.Cristallogr. (1886) 9, 4-6.
C.R.Acad.Sci.Paris Sér.D (1976) 295-297.
Amer.Mineral. (1984) 69, 777-782.
Amer.Mineral. (1984) 69, 783-787.
Amer.Mineral. (1984) 69, 1198.

Internet Links for Davreuxite

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    Localities for Davreuxite

    Hide Locality List
    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.
    (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.
    Belgium
     
    • Liège Province
      • Sankt-Vith
    • Luxembourg Province
      • Stavelot Massif
    		Michel Bloindieau
    Label Ex. Coll. H.J. Wilke
          • Cahai
    		No reference listed
    Bull.Acad.roy.Sci.Belg., 2nd ser.(1876) 46, 240-245
    No reference listed
    Mineral and/or Locality
    Google
     
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 9th Oct 2009 21:59:14