Davreuxite
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About Davreuxite
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).
Type Locality:
This page provides mineralogical data about Davreuxite.
Classification of Davreuxite
Approved, 'Grandfathered' (first described prior to 1959)
8/F.33-10
9.BF.15
9 : SILICATES (Germanates)
B : Sorosilicates
F : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in tetrahedral [4] and greater coordination
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)
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
16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn
Physical Properties of Davreuxite
Colour:
Creamy-white, pale rose pink
Hardness:
2 - 3 on Mohs scale
Optical Data of Davreuxite
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.
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
weak
Chemical Properties of Davreuxite
Formula:
MnAl6Si4O17(OH)2
IMA Formula:
Mn2+Al6Si4O17(OH)2
Common Impurities:
Ti,Fe,Cr,Cu,Zn,Mg,P
Crystallography of Davreuxite
Crystal System:
Monoclinic
Cell Parameters:
a = 9.55 Å, b = 5.77 Å, c = 12.88 Å
β = 116.82°
β = 116.82°
Ratio:
a:b:c = 1.655 : 1 : 2.232
Unit Cell V:
633.39 ų (Calculated from Unit Cell)
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0000955 | Davreuxite | Sahl K, Jones P G, Sheldrick G M (1984) The crystal structure of davreuxite, MnAl6Si4O17(OH)2 American Mineralogist 69 783-787 |  | 1984 | 0 | 293 |
CIF Raw Data - click here to close
Type Occurrence of Davreuxite
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
Mineralogical Museum University of Wroclaw, Poland
Other Language Names for Davreuxite
Related Minerals - Nickel-Strunz Grouping
| 9.BF.05 | Harstigite | Ca6(Mn,Mg)Be4Si6(O,OH)24 | Orth. |
| 9.BF.10 | Samfowlerite | Ca28Mn6Zn4(Be,Zn)4Be12[(OH)3(SiO4)3(Si2O7)2]4 | Mon. 2/m : P21/b |
| 9.BF.20 | Queitite | Pb4Zn2(SO4)(SiO4)(Si2O7) | Mon. 2 : P21 |
Related Minerals - Hey's Chemical Index of Minerals Grouping
| 16.16.1 | Kanonaite | Mn3+Al(SiO4)O | Orth. mmm (2/m 2/m 2/m) : Pnnm |
| 16.16.2 | Spessartine | Mn2+3Al2(SiO4)3 | Iso. m3m (4/m 3 2/m) : Ia3d |
| 16.16.4 | Sursassite | Mn2+2Al3(SiO4)(Si2O7)(OH)3 | Mon. 2/m : P21/m |
| 16.16.5 | Carpholite | Mn2+Al2(Si2O6)(OH)4 | Orth. |
| 16.16.6 | Kellyite | Mn2+2Al(AlSiO5)(OH)4 | Hex. 6 : P63 |
| 16.16.7 | Pennantite | Mn2+5Al(AlSi3O10)(OH)8 | Tric. |
| 16.16.8 | Akatoreite | Mn2+9Al2Si8O24(OH)8 | Tric. |
| 16.16.9 | Ganophyllite | (K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O | Mon. |
| 16.16.10 | Mangano-ferri-eckermannite | {Na}{Na2}{Mn2+4Fe3+}Si8O22(OH)2 | Mon. |
| 16.16.11 | Masutomilite | (K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2 | Mon. |
| 16.16.13 | Howieite | Na(Fe,Mn)10(Fe,Al)2Si12O31(OH)13 | Tric. |
| 16.16.14 | Eggletonite | (Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2O | Mon. |
| 16.16.15 | Bannisterite | (Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2O | Mon. 2/m : B2/b |
| 16.16.16 | Taneyamalite | (Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44 | Tric. |
| 16.16.17 | Zussmanite | K(Fe,Mg,Mn)13(Si,Al)18O42(OH)14 | Trig. 3 : R3 |
| 16.16.18 | Coombsite | KMn2+13(Si,Al)18O42(OH)14 | Trig. |
| 16.16.19 | Henritermierite | Ca3Mn3+2(SiO4)2[◻(OH)4] | Tet. 4/mmm (4/m 2/m 2/m) : I41/acd |
| 16.16.20 | Macfallite | Ca2Mn3+3(SiO4)(Si2O7)(OH)3 | Mon. |
| 16.16.21 | Ottrélite | (Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2 | Mon. |
| 16.16.22 | Piemontite | {Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 16.16.23 | Okhotskite | Ca2Mn2+Mn3+2[Si2O6OH][SiO4](OH)2(OH) | Mon. |
| 16.16.24 | Pumpellyite-(Mn2+) | Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH) | Mon. |
| 16.16.25 | Piemontite-(Sr) | {CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH) | Mon. |
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 Davreuxite
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 Davreuxite
mindat.org URL:
https://www.mindat.org/min-1237.html
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Localities for Davreuxite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Belgium | |
| 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). |
| 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 | |
| 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 | |
| Gunnar Färber |
Salmchâteau, Vielsalm, Luxembourg, Wallonia, Belgium