Ardennite-(As)
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About Ardennite-(As)
Formula:
Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6
Colour:
Yellow to Brown
Lustre:
Sub-Adamantine
Hardness:
6 - 7
Specific Gravity:
3.69 - 3.75
Crystal System:
Orthorhombic
Member of:
Name:
For the type locality in the Ardennes Mountains, Belgium.
The AsO4-analogue of (the less common) ardennite-(V).
Prior to an IMA redefinition in 2007, the name ardennite was used for ardennite-(As).
Structurally closely related to lavoisierite.
Prior to an IMA redefinition in 2007, the name ardennite was used for ardennite-(As).
Structurally closely related to lavoisierite.
Classification of Ardennite-(As)
Approved, 'Grandfathered' (first described prior to 1959)
8/C.34-10
9.BJ.40
9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
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)
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)
17.7.4
17 : Silicates Containing other Anions
7 : Silicates with vanadate, arsenate or antimonate
17 : Silicates Containing other Anions
7 : Silicates with vanadate, arsenate or antimonate
Physical Properties of Ardennite-(As)
Sub-Adamantine
Transparency:
Opaque
Colour:
Yellow to Brown
Hardness:
6 - 7 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {010}, distinct on {110}
Perfect on {010}, distinct on {110}
Parting:
On {001}
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
3.69 - 3.75 g/cm3 (Measured) 3.74 g/cm3 (Calculated)
Optical Data of Ardennite-(As)
Type:
Biaxial (+)
Dispersion:
strong
Pleochroism:
Strong
Comments:
X= dark brownish yellow
Y= golden yellow
X= pale yellow
Y= golden yellow
X= pale yellow
Chemical Properties of Ardennite-(As)
Formula:
Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6
Common Impurities:
Ti,Cu
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 V:
937.23 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Prismatic, radiating fibrous groups.
Crystallographic forms of Ardennite-(As)
Crystal Atlas:
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0009340 | Ardennite-(As) | Donnay G, Allmann R (1968) Si3O10 groups in the crystal structure of ardennite Acta Crystallographica B24 845-855 | ![]() | 1968 | 0 | 293 | |
0019900 | Ardennite-(As) | Nagashima M, Armbruster T (2010) Ardennite, tiragalloite and medaite: structural control of (As5+,V5+,Si4+)O4 tetrahedra in silicates Mineralogical Magazine 74 55-71 | 2010 | Salm-Chateau, Ardennes, Belgium | 0 | 293 | |
0019901 | Ardennite-(As) | Nagashima M, Armbruster T (2010) Ardennite, tiragalloite and medaite: structural control of (As5+,V5+,Si4+)O4 tetrahedra in silicates Mineralogical Magazine 74 55-71 | 2010 | Vernetto mine, Val Lanzo, Torino, Piedmont, Italy | 0 | 293 |
CIF Raw Data - click here to close
Geological Environment
Geological Setting:
Highly oxidized, Mn, Al metasediments.
Type Occurrence of Ardennite-(As)
Place of Conservation of Type Material:
Mineralogical Museum University of Wroclaw
Musée de Minéralogie, Ecole des Mines de Paris (originally as 'dewalquite')
Musée de Minéralogie, Ecole des Mines de Paris (originally as 'dewalquite')
Geological Setting of Type Material:
Pegmatites and quartz veins in schist
Synonyms of Ardennite-(As)
Other Language Names for Ardennite-(As)
Russian:Арденнит-(As)
Spanish:Ardennita
Dewalquita
Dewalquita
Relationship of Ardennite-(As) to other Species
Member of:
Other Members of this group:
Alpeite | Ca4Mn3+2Al2(Mn3+Mg)(SiO4)2(Si3O10)(V5+O4)(OH)6 | Orth. mmm (2/m 2/m 2/m) : Pmmn |
Ardennite-(Si) | ~Mn2+4Al4(AlMg)(SiO4,AsO4)(SiO4)2(Si3O10)(OH)6 | |
Ardennite-(V) | Mn2+4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6 | Orth. mmm (2/m 2/m 2/m) : Pmmn |
Kannanite | Ca4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6 | Orth. mmm (2/m 2/m 2/m) : Pmmn |
Common Associates
Albite | Na(AlSi3O8) |
Braunite | Mn2+Mn3+6(SiO4)O8 |
Hematite | Fe2O3 |
Piemontite | {Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH) |
Pyrolusite | Mn4+O2 |
Quartz | SiO2 |
Spessartine | Mn2+3Al2(SiO4)3 |
Associated Minerals Based on Photo Data:
2 photos of Ardennite-(As) associated with Quartz | SiO2 |
1 photo of Ardennite-(As) associated with Piemontite | {Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH) |
1 photo of Ardennite-(As) associated with Manganiandrosite-(La) | {Mn2+La}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH) |
Related Minerals - Nickel-Strunz Grouping
9.BJ. | Arsenmedaite | Mn2+6 As5+Si5O18(OH) | Mon. 2/m |
9.BJ.05 | Orientite | Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O | Orth. |
9.BJ.10 | Rosenhahnite | HCa3[Si3O9(OH)] | Tric. |
9.BJ.15 | Trabzonite | Ca4(Si3O9)(OH)2 | Orth. mm2 : Ama2 |
9.BJ.20 | Thalénite-(Y) | Y3Si3O10F | Mon. |
9.BJ.25 | Tiragalloite | Mn2+4As5+Si3O12(OH) | Mon. 2/m |
9.BJ.30 | Medaite | Mn2+6V5+Si5O18(OH) | Mon. |
9.BJ.35 | Ruizite | Ca2Mn3+2[Si4O11(OH)2](OH)2 · 2H2O | Mon. 2 |
9.BJ.40 | Ardennite-(V) | Mn2+4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6 | Orth. mmm (2/m 2/m 2/m) : Pmmn |
9.BJ.45 | Kilchoanite | Ca6(SiO4)(Si3O10) | Orth. |
9.BJ.50 | Kornerupine | Mg3Al6(Si,Al,B)5O21(OH) | Orth. mmm (2/m 2/m 2/m) |
9.BJ.50 | Prismatine | (◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22 | Orth. |
9.BJ.55 | Zunyite | Al13Si5O20(OH,F)18Cl | Iso. 4 3m : F4 3m |
9.BJ.60 | Hubeite | Ca2Mn2+Fe3+Si4O12(OH) · 2H2O | Tric. |
9.BJ.65 | Cassagnaite | (Ca,Mn2+)4(Fe3+,Mn3+,Al)4(V3+,Mg,Al)2(Si3O10)(SiO4)2(OH,O)8 | Orth. mmm (2/m 2/m 2/m) : Cmcm |
Related Minerals - Dana Grouping (8th Ed.)
58.3.1.2 | Orientite | Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O | Orth. |
Related Minerals - Hey's Chemical Index of Minerals Grouping
17.7.1 | Suzukiite | BaVSi2O7 | Orth. |
17.7.2 | Franciscanite | Mn2+6(V5+,◻)2(SiO4)2(O,OH)6 | Hex. |
17.7.3 | Kurumsakite | (Zn,Ni,Cu)8Al8V5+2Si5O35 · 27H2O (?) | Orth. |
17.7.5 | Medaite | Mn2+6V5+Si5O18(OH) | Mon. |
17.7.6 | Johninnesite | Na2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2 | Tric. |
17.7.7 | Tiragalloite | Mn2+4As5+Si3O12(OH) | Mon. 2/m |
17.7.8 | Dixenite | CuMn2+14Fe2+(SiO4)2(As5+O4)(As3+O3)5(OH)6 | Trig. |
17.7.9 | Asbecasite | Ca3(Ti,Sn4+)Be2(AsO3)6(SiO4)2 | Trig. 3m : P3c1 |
17.7.10 | Mcgovernite | Mn19Zn3(AsO4)3(AsO3)(SiO4)3(OH)21 | Trig. 3m (3 2/m) |
17.7.11 | Kraisslite | Zn3(Mn,Mg)25(Fe3+,Al)(As3+O3)2[(Si,As5+)O4]10(OH)16 | Orth. 2 2 2 : C2 2 21 |
17.7.12 | Schallerite | Mn2+16As3Si12O36(OH)17 | Trig. 3m : P3m1 |
17.7.13 | Nelenite | (Mn,Fe)16(Si12O30)(OH)14[As3+3O6(OH)3] | Mon. |
17.7.14 | Kolicite | Mn2+7Zn4(AsO4)2(SiO4)2(OH)8 | Orth. mmm (2/m 2/m 2/m) : Cmca |
17.7.15 | Yeatmanite | Zn6Mn2+9Sb5+2(SiO4)4O12 | Tric. |
17.7.16 | Welshite | Ca4Mg9Sb3O4[Si6Be3AlFe2O36] | Tric. 1 : P1 |
17.7.17 | Katoptrite | (Mn2+,Mg)13(Al,Fe3+)4Sb5+2(SiO4)2O20 | Mon. 2/m : B2/m |
17.7.18 | Parwelite | Mn10Sb2As2Si2O24 | Mon. m : Bb |
17.7.19 | Långbanite | Mn2+4Mn3+9Sb5+O16(SiO4)2 | Trig. 3m : P3m1 |
17.7.20 | Chapmanite | Fe3+2Sb3+(Si2O5)O3(OH) | Mon. m : Bm |
17.7.21 | Cervandonite-(Ce) | (Ce,Nd,La)(Fe3+,Fe2+,Ti,Al)3O2(Si2O7)(As3+O3)(OH) | Trig. 3m : R3m |
Other Information
Health Risks:
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:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
von Lasaulx, A. (1872) Ardennit, ein neues Mineral. Neues Jahrbuch für Mineralogie, Geologie und Paläontologie, 930-934.
von Lasaulx, A. (1872) Über ein neues Mineral aus der Gegend von Ottrez. Sitzungsberichte der niederrheinischen Gesellschaft für Natur- und Heilkunde in Bonn. Verhandlungen des Naturhistorischen Vereines der Preussischen Rheinlande und Westphalens, 29, 189-192.
Cesàro, G., Abraham, A. (1909) La dewalquite. Annales de la Société géologique de Belgique, 36, M197.
Brasseur, H. (1930) Données nouvelles sur la structure de dewalquite et considérations sur sa composition chimique. Comptes Rendus du Congrès national des Sciences, Bruxelles, 144.
Buttgenbach, H. (1931) Sur un cristal de dewalquite. Annales de la Société géologique de Belgique, 55, B176.
Nayak, V.K. (1967) Ardennite from Kajlidongri, India. New locality. Neues Jahrbuch für Mineralogie, Abhandlungen, 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. European Journal of Mineralogy, 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)
mindat.org URL:
https://www.mindat.org/min-322.html
Please feel free to link to this page.
Please feel free to link to this page.
External Links:
Mineral Dealers:
Localities for Ardennite-(As)
Locality List




All localities listed without proper references should be considered as questionable.
Austria | |
| Kolitsch, U., Schachinger, T. and Bernhard, F. (2015): Ardennite-(As), ardennite-(V), gasparite-(Ce) and chernovite-(Y): first results of a mineralogical study of the metaradiolarite-hosted manganese ore mineralisations in the Fuchssee area, Radstadt Tauern, Salzburg, Austria. MinPet 2015, Leoben, Austria, September 10-13; abstract in Mitt. Österr. Mineral. Ges. 161, 67. |
| Kolitsch, U., Schachinger, T. and Bernhard, F. (2015): Ardennite-(As), ardennite-(V), gasparite-(Ce) and chernovite-(Y): first results of a mineralogical study of the metaradiolarite-hosted manganese ore mineralisations in the Fuchssee area, Radstadt Tauern, Salzburg, Austria. MinPet 2015, Leoben, Austria, September 10-13; abstract in Mitt. Österr. Mineral. Ges. 161, 67.; Kolitsch, U., Schachinger, T., Auer, C. (2019): 2113) Akatoreit(?), Albit, Ardennit-(As), Ardennit-(V), „Ardennit-(Si)“, Baryt, Brandtit(?) (oder unbenanntes Ca2Mn(AsO4)2?), Coelestin, Fluorapatit, Fluorcalcioroméit, Frankdicksonit(?), Friedelit, Ganophyllit(?), Hämatit, Hausmannit, Hollandit, Jacobsit, Klinochlor, Kutnohorit, Manganberzeliit, Manganiandrosit-(La)-Manganiakasakait-(La)-Mischkristalle, Muskovit, Opal(?), Pennantit, Piemontit(?), Pyrobelonit, Pyrophanit, Quarz, Rhodochrosit, Rhodonit, Sarkinit, Schallerit, Spessartin, Svabit, Tephroit, Tilasit und Tiragalloit vom Navisbach, Navistal, Nordtirol. Pp. 251-260 in Walter, F. et al. (2019): Neue Mineralfunde aus Österreich LXVIII. Carinthia II, 209./129., 237-362. |
Belgium | |
| Alan Backaert collection (found 2013-2016) |
| Hatert, F., Deliens, M., Fransolet, A.-M., Van Der Meersche, E. (2002) Les minéraux de Belgique. 2ème édition, Muséum des Sciences Naturelles, Bruxelles, Belgium, 304 pages (in French). |
| Anthony, J.W., Bideaux, R.A., Bladh, K.W., Nichols, M.C. (xxxx) Handbook of Mineralogy.; Hatert, F., Deliens, M., Fransolet, A.-M., Van Der Meersche, E. (2002) Les minéraux de Belgique. 2ème édition, Muséum des Sciences Naturelles, Bruxelles, Belgium, 304 pages (in French). |
Ann.Mines, 4th ser. (1842) 2, 357 | |
| von Lasaulx, A. (1872) Ardennit, ein neues Mineral. Neues Jahrbuch für Mineralogie, Geologie und Paläontologie, 930-934. |
Blondieau, M., Puccio, S., Compere, P., Hatert, F. (2017) Données nouvelles sur quelques espèces minérales de Vielsalm et de Salmchâteau. Bulletin de la Société Royale des Sciences de Liège, 86, 1-48. | |
France | |
| Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols |
Greece | |
| Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols |
| Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols |
India | |
| Nayak, V. K. (1967): Ardennite from Kajlidongri, India. New locality. Neues Jahrbuch für Mineralogie, Abhandlungen 1967, 295-304. |
Italy | |
| 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. |
| 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, 607 pp. |
| Balestra C. (2014): Sistematica ligure 2014. Prie, 10, 35-37; Munì F. (2014): Caratterizzazione mineralogica e minerochimica delle quarziti manganesifere della Val Varenna (Liguria). Università degli Studi di Genova. Scuola di Scienze Matematiche, Fisiche e Naturali. Tesi di laurea triennale in Scienze Geologiche, 70 pp. |
| analysed by Dr. Anthony Kampf, Natural History Museum of Los Angeles County, USA |
| analysed by Dr. Anthony Kampf, Natural History Museum of Los Angeles County, USA |
| - Bedognè, F., Montrasio, A., Sciesa, E. (1993): I minerali della provincia di Sondrio: Valmalenco. Bettini, Sondrio, 275 pp. - Barresi, A.A., Orlandi, P., Pasero, M. (2007): History of ardennite and the new mineral ardennite-(V). Eur. J. Mineral., 19, 581-587. |
| Zambonini, F. (1922): Ardennite di Ceres in val d'Ala (Piemonte). Atti della Reale Accademia Nazionale dei Lincei, serie 5, Rendiconti, Classe di scienze fisiche, matematiche e naturali, 31, 1, 147-151; Maccario, G., Meda, F.(1970): Il giacimento manganesifero di Vernetto,Ceres. Notiziario del Gruppo Mineralogico Piemontese, 2(2),9-10; Nagashima, M., Armbruster, T. (2010): Ardennite, tiragalloite and medaite: structural control of (As5+,V5+,Si4+)O4 tetrahedra in silicates. Mineralogical Magazine 74, 55-71 |
| 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. |
| Bonino A. (1965): Cenni petrografici su due giacimenti manganesiferi delle Alpi piemontesi. Atti e Rassegna Tecnica della Società degli ingegneri e degli architetti in Torino, 19, 12, 613-616; Peters Tj., Trommsdorff V., Sommerauer J. (1978): Manganese pyroxenoids and carbonates: critical phase relations in metamorphic assemblages from the Alps. Contrib. Mineral. Petrol., 66, 383-388; Piccoli G.C., Maletto G., Bosio P., Lombardo B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" di Alba, Ed., Alba (Cuneo), 607 pp. |
Japan | |
| The Mineral Species of Japan (5th ed) Matsubara |
| Masaki Enami (1986) Mineralogical Journal, 13, 151-160. |
| The Mineral Species of Japan (5th ed) Matsubara |
| Sasaki, N., Yano, M. & Matsuyama, F. (2002): Ardennite from the Tone mine, Nagasaki Prefecture, Japan. Chigaku Kenkyu 51, 67-72. (in Japanese) |
Minakawa, T., & Momoi, H. (1987). Occurrences of ardennite and sursassite from the metamorphic manganese deposits in the Sanbagawa belt, Shikoku. Japan. Journal of the Mineralogical Society of Japan, 18, 87-98. | |
| Joe Cilen collection No. 21,034 |
New Zealand | |
| C. Lemanski, Jr. collection (6782CL). |
North Macedonia | |
| Schweiz. mineral. petrogr. Mitt. (1994) 74, 321-328; Canadian Mineralogist(1996) 34, 1287-1297 |
Russia | |
| Pavel M. Kartashov data |
Switzerland | |
| 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) | |
| 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 | |
| Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 49 |
UK | |
| Embrey, P.G. (1978) Fourth supplementary list of British minerals. Mineralogical Magazine, vol. 42, n° 322, 169-177; 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. |
Quick NavTopAbout Ardennite-(As)Classification Physical Properties Optical Data Chemical Properties Crystallography Crystallographic forms Crystal StructureGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesNickel-StrunzDanaHey's CIMOther InformationReferences Internet Links Localities Locality List
Salmchâteau, Vielsalm, Luxembourg, Wallonia, Belgium