Davreuxite Mineral Data + 
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- 58.1.2.1 Davreuxite MnAl6Si4O17(OH)2 P 21/m 2/m
- VIII/F.33-10 Davreuxite MnAl6Si4O17(OH)2 P 21/m 2/m
- VIII/F.33-20 Strakhovite NaBa3(Mn,Mn)4Si6O19(OH)3 P nma 2/m 2/m 2/m
General Davreuxite Information |
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 Chemical Formula: |
MnAl6Si4O17(OH)2 | ||
| Composition: |
Molecular Weight = 635.17 gm | ||
| Manganese 8.65 % Mn 11.17 % MnO | |||
| Aluminum 25.49 % Al 48.16 % Al2O3 | |||
| Silicon 17.69 % Si 37.84 % SiO2 | |||
| Hydrogen 0.32 % H 2.84 % H2O | |||
| Oxygen 47.86 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Mn2+Al6Si4O17(OH)2 | ||
| IMA Status: |
Valid Species (Pre-IMA) 1878 | ||
| Locality: |
Link to MinDat.org Location Data. | ||
| Synonym: |
ICSD 30870 | ||
| PDF 37-431 | |||
Davreuxite Image | |||
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Images:
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Davreuxite Crystallography |
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| Axial Ratios: |
a:b:c =1.6559:1:2.0941 | ||
| Cell Dimensions: |
a = 9.55, b = 5.767, c = 12.077, Z = 2; beta = 108.1° V = 632.23 Den(Calc)= 3.34 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.511(1), 2.87(0.6), 3.103(0.45), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Davreuxite |
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| Cleavage: |
[100] Good | ||
| Color: |
Cream white, Light pink. | ||
| Density: |
3.15 | ||
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
| Hardness: |
2-3 - Gypsum-Calcite | ||
| Luster: |
Silky | ||
| Streak: |
white | ||
Optical Properties of Davreuxite |
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| Gladstone-Dale: |
CI meas= -0.025 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.034 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.203,KPDmeas= 0.2152,KC= 0.21 |
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| Optical Data: |
Biaxial (-), a=1.66, b=1.684, g=1.69, bire=0.0300, 2V(Calc)=52, 2V(Meas)=48. | ||
Calculated Properties of Davreuxite |
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| Electron Density: |
relectron=3.10 gm/cc |
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| Fermion Index |
Fermion Index = 0.00848 Boson Index = 0.99152 |
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| Photoelectric: |
PEDavreuxite = 3.60 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Davreuxite is Not Radioactive |
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Davreuxite Classification |
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| Dana Class: |
58.1.2.1 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups | ||
| (58.1)with cations in [4] and higher coordination; single and double groups (n=1,2) | |||
| (58.1.2)Dana Group | |||
| Strunz Class: |
VIII/F.33-10 VIII - Silicates | ||
| VIII/F - Inosilicates (chain and band) Combination of chains and groups | |||
| VIII/F.33 - Davreuxite series | |||
Other Davreuxite Information |
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| References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Davreuxite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris Search for Davreuxite using: Visit our Advertisers for Davreuxite : Translate Davreuxite Mineral Data : Ask about Davreuxite here : Print or Cut-and-Paste your Davreuxite Specimen Label here :
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