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Ardennite-(As)

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Salmchâteau, Vielsalm, Stavelot Massif, Luxembourg Province, Belgium
© j vanheuverzwijn

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Formula:
Mn
2+
4
(Al,Mg)
 
6
(Si
 
3
O
 
10
)(SiO
 
4
)
 
2
(AsO
 
4
,VO
 
4
)(OH)
 
6
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:Salmchâteau, 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):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
(Si
 
3
O
 
10
)(SiO
 
4
)
 
2
(AsO
 
4
,VO
 
4
)(OH)
 
6
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
Mn
2+
 
Mn
3+
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
2+
4
(HAsSi
 
3
O
 
13
)
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
(Si
 
3
O
 
10
)(SiO
 
4
)
 
2
(VO
 
4
,SiO
 
4
)(OH)
 
6
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
(Si
 
3
O
 
10
)(SiO
 
4
)
 
2
(OH,O)
 
8
Related Minerals - Hey's Index Grouping:

- +
17.7.1Suzukiite
BaVSi
 
2
O
 
7
17.7.2Franciscanite
Mn
2+
6
(V
5+
 
,☐)
 
2
(SiO
 
4
)
 
2
(O,OH)
 
6
17.7.3Kurumsakite
(Zn,Ni,Cu)
 
8
Al
 
8
V
5+
2
Si
 
5
O
 
35
 · 27H
 
2
O (?)
17.7.5Medaite
(Mn,Ca)
 
6
(V,As)Si
 
5
O
 
18
OH
17.7.6Johninnesite
Na
 
2
Mn
2+
9
Mg
 
7
(OH)
 
8
[AsO
 
4
]
 
2
[Si
 
6
O
 
17
]
 
2
17.7.7Tiragalloite
Mn
2+
4
(HAsSi
 
3
O
 
13
)
17.7.8Dixenite
CuMn
2+
14
Fe
2+
 
(SiO
 
4
)
 
2
(As
5+
 
O
 
4
)(As
3+
 
O
 
3
)
 
5
(OH)
 
6
17.7.9Asbecasite
Ca
 
3
(Ti,Sn
4+
 
)Be
 
2
(AsO
 
3
)
 
6
(SiO
 
4
)
 
2
17.7.10Mcgovernite
Mn
 
19
Zn
 
3
(AsO
 
4
)
 
3
(AsO
 
3
)(SiO
 
4
)
 
3
(OH)
 
21
17.7.11Kraisslite
Zn
 
3
(Mn,Mg)
 
25
(Fe
3+
 
,Al)(As
3+
 
O
 
3
)
 
2
[(Si,As
5+
 
)O
 
4
]
 
10
(OH)
 
16
17.7.12Schallerite
(Mn,Fe)
 
16
Si
 
12
As
 
3
O
 
36
(OH)
 
17
17.7.13Nelenite
(Mn,Fe)
 
16
(Si
 
12
O
 
30
)(OH)
 
14
[As
3+
3
O
 
6
(OH)
 
3
]
17.7.14Kolicite
Mn
2+
7
Zn
 
4
(AsO
 
4
)
 
2
(SiO
 
4
)
 
2
(OH)
 
8
17.7.15Yeatmanite
Zn
 
6
Mn
2+
9
Sb
5+
2
(SiO
 
4
)
 
4
O
 
12
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
(SiO
 
4
)
 
2
O
 
20
17.7.18Parwelite
Mn
 
10
Sb
 
2
As
 
2
Si
 
2
O
 
24
17.7.19Långbanite
(Mn
2+
 
,Ca)
 
4
(Mn
3+
 
,Fe
3+
 
)
 
9
Sb
5+
 
(SiO
 
4
)
 
2
O
 
16
17.7.20Chapmanite
Fe
3+
2
Sb
3+
 
(SiO
 
4
)
 
2
(OH)
17.7.21Cervandonite-(Ce)
(Ce,Nd,La)(Fe
3+
 
,Fe
2+
 
,Ti,Al)
 
3
O
 
2
(Si
 
2
O
 
7
)(As
3+
 
O
 
3
)(OH)

Other Names for Ardennite-(As)

Synonyms:
ArsenioardenniteDewalquite
Other Languages:
German:Ardennit
Dewalquit
Russian:Арденнит-(As)
Simplified Chinese:砷铝钡矿
砷锰硅铝矿
Spanish:Ardennita
Dewalquita

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.

Internet Links for Ardennite-(As)

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  • Ardennite details from Handbook of Mineralogy (PDF)
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    • Localities for Ardennite-(As)

    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.
    Hide Locality List
    (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; Nagashima, M. and Armbruster, T. (2010): Ardennite, tiragalloite and medaite: structural control of (As5+,V5+,Si4+)O4 tetrahedra in silicates. Mineralogical Magazine 74, 55-71
    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; Nagashima, M. and Armbruster, T. (2010): Ardennite, tiragalloite and medaite: structural control of (As5+,V5+,Si4+)O4 tetrahedra in silicates. Mineralogical Magazine 74, 55-71
            • Lanzo Massif
              • Balangero - Corio area
    		Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
    Japan
     
    • Honshu Island
      • Kanto Region
        • Gunma Prefecture
          • Tano-gun
            • Oniishi-machi (Onishi-machi)
    		The Mineral Species of Japan (5th ed) Matsubara
    • Kyushu Region
      • Nagasaki Prefecture
        • Nagasaki City
          • Kinkai-Tone-machi
    		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
    		Masaki Enami (1986) Mineralogical Journal, 13, 151-160.
        • Nagaoka-gun
    		The Mineral Species of Japan (5th ed) Matsubara
      • Tokushima prefecture
    		Joe Cilen collection No. 21,034
    New Zealand
     
    • South Island
      • Otago
        • Queenstown
    		C. Lemanski, Jr. collection (6782CL).
    Republic of Macedonia
     
    • Veles
    		Schweiz. mineral. petrogr. Mitt. (1994) 74, 321-328; Can.Min.(1996) 34, 1287-1297
    Russia
     
    • Northern Region
      • Komi Republic
        • Prepolar Ural
          • Kozhim River Basin
            • Maldynyrd (Maldy-nyrd) range
              • Grubependity Lake
    		Pavel M. Kartashov data
    Switzerland
     
    • Grischun (Grisons; Graubünden)
      • 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; Brugger J. (1996): The Fe, Mn, (V, Sb, As, Be, W) deposits of Val Ferrera (Graubünden, Switzerland). Unpublished PhD Thesis, Univ. Basel. 188 p.
    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
      • 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)
    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. and Rumsey, M.S. (2010): Mineral Relationships in the Mendip Hills. Journal of the Russell Society, vol 13, pp 3-46.
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