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Ardennite-(As)

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Salm-Château, Vielsalm, Stavelot Massif, Luxembourg Province, Belgium
© j vanheuverzwijn

Show Ardennite-(As) Photos (21)
Formula:
Mn
2+
4
[(Al,Mg)
 
6
][(OH)
 
6
|(AsO
 
4
,VO
 
4
)|(SiO
 
4
)
 
2
|Si
 
3
O
 
10
]
System:OrthorhombicColour:Yellow to Brown
Hardness:6 - 7
Name:For the type locality in the Ardennes Mountains, Belgium.


Ardennite Group.

The AsO4-analogue of Ardennite-(V).
Prior to an IMA redefinition in 2007, the name ardennite was used for ardennite-(As).

Classification of Ardennite-(As)

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/C.34-10
Nickel-Strunz 10th (pending) edition ID:9.BJ.40

9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
Dana 8th edition ID:58.3.1.1

58 : SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
3 : Insular, Mixed, Single, and Larger Tetrahedral Groups with insular single and triple groups (n=1, 3)
Hey's CIM Ref.:17.7.4

17 : Silicates Containing other Anions
7 : Silicates with vanadate, arsenate or antimonate
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Type Occurrence of Ardennite-(As)

Type Locality:Salm-Château, Vielsalm, Stavelot Massif, Luxembourg Province, Belgium
Year of Discovery:1872
Geological Setting of type material:Pegmatites and quartz veins in schist

Occurrences of Ardennite-(As)

Geological Setting:Highly oxidized, Mn, Al metasediments.

Physical Properties of Ardennite-(As)

Lustre:Sub-Adamantine
Diaphaneity (Transparency):Translucent on thin edges, Opaque
Colour:Yellow to Brown
Hardness (Mohs):6 - 7
Tenacity:Brittle
Cleavage:Perfect
Perfect on {010}, distinct on {110}
Parting:On {001}
Fracture:Irregular/Uneven, Sub-Conchoidal
Density (measured):3.69 - 3.75 g/cm3
Density (calculated):3.74 g/cm3

Crystallography of Ardennite-(As)

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:a = 8.7126(8) Å, b = 18.5124(11) Å, c = 5.8108(8) Å
Ratio:a:b:c = 0.471 : 1 : 0.314
Unit Cell Volume:V 937.23 ų (Calculated from Unit Cell)
Z:2
Morphology:Prismatic, radiating fibrous groups.
Crystal Atlas:
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Ardennite no.1 - Goldschmidt (1913-1926)

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Optical Data of Ardennite-(As)

Type:Biaxial (+)
Dispersion:strong
Pleochroism:Strong
Comments:X= dark brownish yellow
Y= golden yellow
X= pale yellow

Chemical Properties of Ardennite-(As)

Formula:
Mn
2+
4
[(Al,Mg)
 
6
][(OH)
 
6
|(AsO
 
4
,VO
 
4
)|(SiO
 
4
)
 
2
|Si
 
3
O
 
10
]
Essential elements:Al, As, H, Mn, O, Si
All elements listed in formula:Al, As, H, Mg, Mn, O, Si, V
Common Impurities:Ti,Cu

Relationship of Ardennite-(As) to other Species

Common Associates:
SpessartineQuartzPyrolusitePiemontiteHematite
BrauniteAlbite
Related Minerals - Nickel-Strunz Grouping):
9.BJ.05Orientite
Ca
 
2
MnMn
 
2
Si
 
3
O
 
10
(OH)
 
4
9.BJ.10Rosenhahnite
HCa
 
3
[Si
 
3
O
 
9
(OH)]
9.BJ.15Trabzonite
Ca
 
4
Si
 
3
O
 
10
·2H
 
2
O
9.BJ.20Thalénite-(Y)
Y
 
3
Si
 
3
O
 
10
(OH)
9.BJ.20Fluorthalénite-(Y)
Y
 
3
Si
 
3
O
 
10
F
9.BJ.25Tiragalloite
Mn
 
4
AsSi
 
3
O
 
12
(OH)
9.BJ.30Medaite
(Mn,Ca)
 
6
(V,As)Si
 
5
O
 
18
OH
9.BJ.35Ruizite
Ca
 
2
Mn
3+
2
[(OH)
 
2
|H
 
2
Si
 
4
O
 
13
] · 2H
 
2
O
9.BJ.40Ardennite-(V)
Mn
2+
4
[Al
 
4
(Mg,Al,Fe
3+
 
,Mn
3+
 
)
 
2
][(OH)
 
6
|(VO
 
4
,SiO
 
4
)|(SiO
 
4
)
 
2
|Si
 
3
O
 
10
]
9.BJ.45Kilchoanite
Ca
 
3
Si
 
2
O
 
7
9.BJ.50Kornerupine
Mg
 
3
Al
 
6
(Si,Al,B)
 
5
O
 
21
(OH)
9.BJ.50Prismatine
([ ],Fe,Mg)(Mg,Al,Fe)
 
5
Al
 
4
Si
 
2
(Si,Al)
 
2
(B,Si,Al)(O,OH,F)
 
22
9.BJ.55Zunyite
Al
 
13
Si
 
5
O
 
20
(OH,F)
 
18
Cl
9.BJ.60Hubeite
Ca
 
2
Mn
2+
 
Fe
3+
 
[HSi
 
4
O
 
13
] · 2H
 
2
O
9.BJ.65Cassagnaite
(Ca,Mn
2+
 
)
 
4
(Fe
3+
 
,Mn
3+
 
,Al)
 
4
(V
3+
 
,Mg,Al)
 
2
[(O,OH)
 
4
|(OH)
 
4
|(SiO
 
4
)
 
2
|Si
 
3
O
 
10
]
Related Minerals - Hey's Index Grouping:
17.7.1Suzukiite
BaVSi
 
2
O
 
7
17.7.2Franciscanite
Mn
3+
6
V
5+
0.5
[(O,OH)
 
3
|SiO
 
4
]
17.7.3Kurumsakite
(Zn,Ni,Cu)
 
8
Al
 
8
V
 
2
Si
 
5
O
 
35
·27H
 
2
O (or near)
17.7.5Medaite
(Mn,Ca)
 
6
(V,As)Si
 
5
O
 
18
OH
17.7.6Johninnesite
Na
 
2
Mg
 
5
Mn
 
12
As
 
2
Si
 
12
O
 
43
(OH)
 
6
17.7.7Tiragalloite
Mn
 
4
AsSi
 
3
O
 
12
(OH)
17.7.8Dixenite
CuMn
2+
14
Fe
2+
 
[(OH)
 
6
|(AsO
 
3
)
 
5
|AsO
 
4
|(SiO
 
4
)
 
2
]
17.7.9Asbecasite
Ca
 
3
(Ti,Sn
4+
 
)Be
 
2
[(AsO
 
3
)
 
3
|SiO
 
4
]
 
2
17.7.10Mcgovernite
(Mn,Mg,Zn)
 
273
As
3+
~12
As
5+
~30
Si
 
~42
O
 
324
(OH)
 
252
17.7.11Kraisslite
(Mn
2+
 
,Mg)
 
24
Zn
 
4
[(OH)
 
12
|(AsO
 
4
)
 
4
|(SiO
 
4
)
 
8
]
17.7.12Schallerite
(Mn,Fe)
 
16
Si
 
12
As
 
3
O
 
36
(OH)
 
17
17.7.13Nelenite
(Mn,Fe)
 
16
Si
 
12
As
 
3
O
 
36
(OH)
 
17
17.7.14Kolicite
Mn
2+
7
Zn
 
4
[(OH)
 
8
|(AsO
 
4
)
 
2
|(SiO
 
4
)
 
2
]
17.7.15Yeatmanite
Mn
2+
7
Zn
 
8
Sb
5+
2
[O
 
3
|SiO
 
4
]
 
4
17.7.16Welshite
Ca
 
4
Mg
 
9
Sb
 
3
O
 
4
[Si
 
6
Be
 
3
AlFe
 
2
O
 
36
]
17.7.17Katoptrite
(Mn
2+
 
,Mg)
 
13
(Al,Fe
3+
 
)
 
4
Sb
5+
2
[O
 
10
|SiO
 
4
]
 
2
17.7.18Parwelite
(Mn,Mg,Ca)
 
5
Sb(As,Si)
 
2
O
 
12
17.7.19Långbanite
(Mn
2+
 
,Ca)
 
4
(Mn
3+
 
,Fe
3+
 
)
 
9
Sb
5+
 
[O
 
8
|SiO
 
4
]
 
2
17.7.20Chapmanite
Fe
3+
2
Sb
3+
 
[OH|(SiO
 
4
)
 
2
]
17.7.21Cervandonite-(Ce)
(Ce,Nd,La)(Fe,Ti,Al)
 
3
SiAs(Si,As)O
 
13

Other Names for Ardennite-(As)

Synonyms:
ArsenioardenniteDewalquite
German names:
ArdennitDewalquit
Russian names:
Арденнит-(As)
Spanish names:
ArdennitaDewalquita

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 Ardennite-(As)

Reference List:Nayak, V. K. (1967): Ardennite from Kajlidongri, India. New locality. Neues Jahrbuch für Mineralogie, Abhandlungen 1967, 295-304.

Donnay, G. & Allmann, R. (1968): Si3O10 groups in the crystal structure of ardennite. Acta Crystallographica, B24, 845-855.

Pasero M., Reinecke T., Fransolet A. M.(1994) : Crystal structure refinements and compositional control of Mn-Mg-Ca ardennites from the Belgian Ardennes, Greece, and the Western Alps: Neues Jahrbuch für Mineralogie, Monatshefte und Abhandlungen: 166, 137-167.

Pasero, M. & Reinecke, T. (1991): Crystal chemistry, HRTEM analysis, and polytypic behavior of ardennite. Eur. J. Mineral. 3, 819-830.

Barresi, A., Orlandi, P. & Pasero, M. (2007): History of ardennite and the new mineral ardennite-(V). European Journal of Mineralogy, 19, 581-587.

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    Localities for Ardennite-(As)

    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.
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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.
    Belgium
     
    • Luxembourg Province
      • Stavelot Massif
        • Vielsalm
    		Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
    Ann.Mines, 4th ser. (1842) 2, 357
    Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
    Canada
     
    • Québec
      • Témiscamingue Co.
    		Natural History Museum Vienna collection
    France
     
    • Rhône-Alpes
      • Savoie
        • Maurienne valley
    		Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
    Greece
     
    • Aegean Islands (Aiyaíon) Department
      • Kykládes Prefecture
        • Cyclade Islands (Cyclades; Kikladhes; Nomos Kikladhon)
    		Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
    • Sterea Hellas Department
      • Évvoia Prefecture
    		Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
    India
     
    • Madhya Pradesh
      • Jhabua District
    		Nayak, V. K. (1967): Ardennite from Kajlidongri, India. New locality. Neues Jahrbuch für Mineralogie, Abhandlungen 1967, 295-304.
    Italy
     
    • Aosta Valley
      • Nus
        • Saint-Barthélemy
    		Pelloux, A. (1946): Mineralogy of Aosta Valley. Rend. soc. mineral. ital. 3, 188-206. ; Barresi, A.A., Kolitsch, U., Ciriotti, M.E., Ambrino, P., Bracco, R., Bonacina, E. (2005): La miniera di manganese di Varenche (Aosta, Italia nord-occidentale): ardennite, arseniopleite, manganberzeliite, pirofanite, sarkinite, thortveitite, nuovo As-Sc-analogo della metavariscite e altre specie. Micro (località), 2/2005, 81-122.
    • Piedmont
      • Torino Province
        • Sesia-Lanzo zone
          • Lanzo Valley
            • Grande Valley
              • Ceres
    		Maccario,G.& Meda,F.(1970):Il giacimento manganesifero di Vernetto,Ceres.Notiziario del Gruppo Mineralogico Piemontese,2(2),9-10.
    Japan
     
    • Honshu Island
      • Kanto Region
        • Gunma Prefecture
          • Tano-gun
            • Oniishi-machi (Onishi-machi)
    		The Mineral Species of Japan (5th ed) Matsubara
    • Kyushu Island
      • Nagasaki Prefecture
        • Nishisonogi-gun
    		Sasaki, N., Yano, M. & Matsuyama, F. (2002): Ardennite from the Tone mine, Nagasaki Prefecture, Japan. Chigaku Kenkyu 51, 67-72. (in Japanese)
    • Shikoku Island
      • Kochi Prefecture
    		The Mineral Species of Japan (5th ed) Matsubara
    New Zealand
     
    • South Island
      • Otago
        • Queenstown
    		C. Lemanski, Jr. collection (6782CL).
    Republic of Macedonia
     
    • Pelagonian massif
    		Schweiz. mineral. petrogr. Mitt. (1994) 74, 321-328; Can.Min.(1996) 34, 1287-1297
    Russia
     
    • Northern Region
      • Komi Republic
        • Grubependity lake
    		P.M. Kartashov data
    Switzerland
     
    • Grischun (Grisons; Graubünden)
      • Albula Valley
        • Oberhalbstein (Surses; Sursass)
          • Tinizong (Tinzen)
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 49
    Geiger T. & Cabalzar W. Ardennit - Ein Neufund von der Alp Parsettens, Val d'Err GR. Schweizer Strahler Nr.5, S. 201 - 211, (1989)
      • Bregaglia Valley (Bergell)
        • Maroz Valley
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 49
    Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 49
      • Engadin
        • Piz Corvatsch
    		Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 49
    UK
     
    • England
      • Somerset
        • Cranmore
    		Turner, R. (2006): A mechanism for the formation of the mineralized Mn deposits at Merehead Quarry, Cranmore, Somerset, England. Mineralogical Magazine 70, 629-653; Turner R.W. and Rumsey, M.S. (2007) Merehead Mineralogy - an Update. Russell Soc Newsletter, No 50, pp 17-18 (March 2007); Turner, R.W., (2006) A Mechanism for the formation of the Mineralised Mn Deposits at Merehead Quarry, Cranmore, Somerset, England. Min. Mag. vol. 70, no. 6, pp 629 - 653
    Mineral and/or Locality
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