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Davreuxite

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About DavreuxiteHide

Formula:
MnAl6Si4O17(OH)2
Colour:
Creamy-white, pale rose pink
Hardness:
2 - 3
Crystal System:
Monoclinic
Name:
Originally reported and described by de Koninck in 1878. Named after Belgian pharmacist, natural scientist, and Professor of Mineralogy at the University of Liège Charles Joseph Davreux (Liège, Belgium 10th September 1800 - Liège, Belgium 11th April 1863).
This page provides mineralogical data about Davreuxite.


Classification of DavreuxiteHide

Approved, 'Grandfathered' (first described prior to 1959)
9.BF.15

9 : SILICATES (Germanates)
B : Sorosilicates
F : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in tetrahedral [4] and greater coordination
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)
16.16.3

16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn

Physical Properties of DavreuxiteHide

Colour:
Creamy-white, pale rose pink
Hardness:
2 - 3 on Mohs scale

Optical Data of DavreuxiteHide

Type:
Biaxial (-)
RI values:
nα = 1.660 nβ = 1.684 nγ = 1.690
2V:
Measured: 48° , Calculated: 52°
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
weak

Chemical Properties of DavreuxiteHide

Formula:
MnAl6Si4O17(OH)2
IMA Formula:
Mn2+Al6Si4O17(OH)2
Common Impurities:
Ti,Fe,Cr,Cu,Zn,Mg,P

Crystallography of DavreuxiteHide

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

Type Occurrence of DavreuxiteHide

General Appearance of Type Material:
fibrous masses in quartz veins, in close association with pyrophyllite and kaolinite.
Place of Conservation of Type Material:
Royal Belgium Institute of Natural Sciences, Brussels
Mineralogical Museum University of Wroclaw, Poland

Other Language Names for DavreuxiteHide

Related Minerals - Nickel-Strunz GroupingHide

9.BF.05HarstigiteCa6(Mn,Mg)Be4Si6(O,OH)24Orth.
9.BF.10SamfowleriteCa28Mn6Zn4(Be,Zn)4Be12[(OH)3(SiO4)3(Si2O7)2]4Mon. 2/m : P21/b
9.BF.20QueititePb4Zn2(SO4)(SiO4)(Si2O7)Mon. 2 : P21

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.16.1KanonaiteMn3+Al(SiO4)OOrth. mmm (2/m 2/m 2/m) : Pnnm
16.16.2SpessartineMn2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
16.16.4SursassiteMn2+2Al3(SiO4)(Si2O7)(OH)3Mon. 2/m : P21/m
16.16.5CarpholiteMn2+Al2(Si2O6)(OH)4Orth.
16.16.6KellyiteMn2+2Al(AlSiO5)(OH)4Hex. 6 : P63
16.16.7PennantiteMn2+5Al(AlSi3O10)(OH)8Tric.
16.16.8AkatoreiteMn2+9Al2Si8O24(OH)8Tric.
16.16.9Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2OMon.
16.16.10Mangano-ferri-eckermannite{Na}{Na2}{Mn2+4Fe3+}Si8O22(OH)2Mon.
16.16.11Masutomilite(K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2Mon.
16.16.13HowieiteNa(Fe,Mn)10(Fe,Al)2Si12O31(OH)13Tric.
16.16.14Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2OMon.
16.16.15Bannisterite(Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2OMon. 2/m : B2/b
16.16.16Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44Tric.
16.16.17ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14Trig. 3 : R3
16.16.18CoombsiteK(Mn,Fe,Mg)13(Si,Al)18O42(OH)14Trig.
16.16.19HenritermieriteCa3(Mn3+,Al)2(SiO4)2(OH)4Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
16.16.20MacfalliteCa2Mn3+3(SiO4)(Si2O7)(OH)3Mon.
16.16.21Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2Mon.
16.16.22Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
16.16.23OkhotskiteCa2Mn3+Mn3+2(Si2O7)(SiO4)(OH)2 · H2OMon.
16.16.24Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2OMon.
16.16.25Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)Mon.

Other InformationHide

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 DavreuxiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
de Koninck, L.L. (1878) Sur la davreuxite, espèce nouvelle recueillie dans les filons de quartz du terrain ardennais. Bulletin de l'Académie Royale de Belgique, Série II, 46(8), 240-245.
Lacroix, A. (1886) Propriétés optiques de quelques minéraux (wavellite, variscite, planérite et davreuxite). Bulletin de la Société française de Minéralogie, 9, 4.
Strunz, H. (1970) Mineralogische Tabellen. 5. Auflage. Akademische Verlagsgesellschaft Geest & Portig, Leipzig.
Fransolet, A.M., Bourguignon, P. (1976) Mineralogical data on davreuxite. Comptes Rendus des Séances de l'Académie des Sciences, Série D: Sciences Naturelles 283(4), 295-297 (in French).
Fleischer, M., Pabst, A., Sampson White, J. (1978) New mineral names. American Mineralogist, 63, 793-796 (795).
Fransolet, A.-M., Abraham, K., Sahl, K. (1984) Davreuxite: a reinvestigation. American Mineralogist, 69, 777-782.
Sahl, K., Jones, P.G., Sheldrick, G.M. (1984) The crystal structure of davreuxite, MnAl6Si4O17(OH)2. American Mineralogist, 69, 783-787.
American Mineralogist (1984) Errata. American Mineralogist, 69, 1198.
Van Der Meersche, E., De Paepe, P., Stoops, G. (2010) Minerals with Belgian Roots, from hopeite (1824) to tazieffite (2009). Academia Press, Gent for the Museum for the History of Sciences, 232 pages.

Internet Links for DavreuxiteHide

Localities for DavreuxiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Belgium
 
  • Wallonia
    • Liège
      • Sankt-Vith
Fransolet, A.-M., Abraham, K., Sahl, K. (1984) Davreuxite, a reinvestigation. American Mineralogist, 69, 777.; 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).
    • Luxembourg
Michel Blondieau.; Malaise, C. (1913) Manuel de Minéralogie pratique, 4e éd., Bruxelles.; 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).
H.J. Wilke collection
        • Cahai (Cahay)
Hatert, F., Deliens, M., Fransolet, A.-M. & van der Meersche, E. (2002): Les minéraux de Belgique. 2ème édition, Muséum des Sciences Naturelles, Bruxelles, Ed., 304 p.
de Koninck, L.L. (1878) Sur la davreuxite, espèce nouvelle recueillie dans les filons de quartz du terrain ardennais. Bulletin de l'Académie Royale de Belgique, Série II, 46(8), 240-245.; Lacroix, A. (1886) Propriétés optiques de quelques minéraux (wavellite, variscite, planérite et davreuxite). Bulletin de la Société française de Minéralogie, 9, 4.; de Rauw, H. (1911) Note sur la salmite, le rutile et la tourmaline d'Ottré. Annales de la Société géologique de Belgique, 38, B209.; Fransolet, A.-M., Bourguignon, P. (1976) Précisions minéralogiques sur la davreuxite. Comptes rendus de l'Académie des Sciences de Paris, 283D, 295.; Fransolet, A.-M., Abraham, K., Sahl, K. (1984) Davreuxite, a reinvestigation. American Mineralogist, 69, 777.; Sahl, K., Jones, P.G., Sheldrick, G.M. (1984) The crystal structure of davreuxite. American Mineralogist, 69, 783.; 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).
Corin, F. (1929) Un nouveau filon d'andalousite à Regné. Annales de la Société géologique de Belgique, 53, B16.; Hanson, A. (1983) Étude minéralogique de filons de la bordure méridionale du Massif de Stavelot. Unpublished Diploma Thesis, University of Liège, 84 pages.; 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).
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).
Blondieau, M. (2005) Les gisements minéraux du Salmien dans le massif de Stavelot. Published by M. Blondieau, Tellin, Belgium, 90 pages.
Germany
 
  • Saxony-Anhalt
    • Harz
      • Wippra Metamorphic Zone
        • Mansfeld
Gunnar Färber
 
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