Akdalaite (original) (raw)
A valid IMA mineral species
About AkdalaiteHide
This section is currently hidden. Click the show button to view.
Formerly given as 5Al2O3.H2O.
Colour:
White, pale greenish yellow in thin section
Name:
For the Kazakh name, Akdala, for the type locality.
In the structure there are oxygen planes with ABACA sequence (Yamaguchi et al., 1964). In the ab initio model proposed by Demichelis et al. (2008) there are 8 Al atoms located in the octahedral cavities and 2 Al atoms in the tetrahedral ones; two types of irregular AlO6 edge-sharing octahedra; AlO4 vertices-sharing tetrahedra. There are 2 sheets of first-type (a) octahedra, and two sheets with second-type (b) octahedra and tetrahedra (c).
Recently (2019) proved to be the Al analogue of ferrihydrite.
Unique IdentifiersHide
This section is currently hidden. Click the show button to view.
Long-form identifier:
mindat:1:1:69:3
5cd53f30-cb25-4258-86e8-ee7f2e4997c3
IMA Classification of AkdalaiteHide
This section is currently hidden. Click the show button to view.
Classification of AkdalaiteHide
This section is currently hidden. Click the show button to view.
4.FL.70
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
L : Hydroxides with H2O +- (OH); sheets of edge-sharing octahedra
4.3.2.1
4 : SIMPLE OXIDES
3 : A2X3
7.6.8
7 : Oxides and Hydroxides
6 : Oxides of Al
Mineral SymbolsHide
This section is currently hidden. Click the show button to view.
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Akd | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of AkdalaiteHide
This section is currently hidden. Click the show button to view.
Comment:
vitreous to porcelaneous
Colour:
White, pale greenish yellow in thin section
Fracture:
Irregular/Uneven
Density:
3.68 g/cm3 (Measured) 3.673 g/cm3 (Calculated)
Optical Data of AkdalaiteHide
This section is currently hidden. Click the show button to view.
RI values:
_n_ω = 1.747 _n_ε = 1.741
δ = 0.006
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Chemistry of AkdalaiteHide
This section is currently hidden. Click the show button to view.
Mindat Formula:
Al10O14(OH)2
Formerly given as 5Al2O3.H2O.
Crystallography of AkdalaiteHide
This section is currently hidden. Click the show button to view.
Cell Parameters:
a = 12.87 Å, c = 14.97 Å
Unit Cell V:
2,147.38 ų (Calculated from Unit Cell)
Morphology:
As hexagonal crystals, to 0.8 mm, tabular to equant; in lenslike aggregates.
Comment:
Possible space groups: P6122, P61
Crystal StructureHide
This section is currently hidden. Click the show button to view.
Load
Unit Cell |Unit Cell Packed
2x2x2 |3x3x3 |4x4x4
Show
Big Balls |Small Balls |Just Balls |Spacefill
Polyhedra Off |Si Polyhedra |All Polyhedra
Remove metal-metal sticks
Display Options
Black Background |White Background
Perspective On |Perspective Off
2D |Stereo |Red-Blue |Red-Cyan
View
CIF File Best |x |y |z |a |b |c
Rotation
Stop |Start
Labels
Console Off |On |Grey |Yellow
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0012146 | Akdalaite | Yamaguchi G, Okumiya M, Ono S (1969) Refinement of the structure of tohdite 5Al2O3*H2O Bulletin of the Chemical Society of Japan 42 2247-2249 | 1969 | synthetic | 0 | 293 | |
| 0013283 | Akdalaite | Demichelis R, Noel Y, Zicovich-Wilson C M, Roetti C, Valenzano L, Dovesi R (2008) Ab-initio quantum mechanical study of akdalaite (5Al2O3*H2O): Structure and vibrational spectrum, Journal of Physics: Conference Series 117 012013-012013 | 2008 | Theoretical structure | 0 | 293 | |
| 0013284 | Akdalaite | Demichelis R, Noel Y, Zicovich-Wilson C M, Roetti C, Valenzano L, Dovesi R (2008) Ab-initio quantum mechanical study of akdalaite (5Al2O3*H2O): Structure and vibrational spectrum, Journal of Physics: Conference Series 117 012013-012013 | 2008 | Theoretical structure | 0 | 293 | |
| 0013285 | Akdalaite | Demichelis R, Noel Y, Zicovich-Wilson C M, Roetti C, Valenzano L, Dovesi R (2008) Ab-initio quantum mechanical study of akdalaite (5Al2O3*H2O): Structure and vibrational spectrum, Journal of Physics: Conference Series 117 012013-012013 | 2008 | Theoretical structure | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
This section is currently hidden. Click the show button to view.
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 0.9931 Å | (9) |
| 1.393 Å | (10) |
| 1.418 Å | (10) |
| 2.11 Å | (10) |
| 2.32 Å | (8) |
| 2.35 Å | (9) |
| 2.494 Å | (9) |
Comments:
Material from type locality
Geological EnvironmentHide
This section is currently hidden. Click the show button to view.
Type Occurrence of AkdalaiteHide
This section is currently hidden. Click the show button to view.
General Appearance of Type Material:
lenslike aggregates and tabular to equant hexagonal crystals to 0.1 mm
Place of Conservation of Type Material:
A. E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia
Geological Setting of Type Material:
veinlets cutting amesite-fluorite-muscovite rock and fluorite-magnetite-diopside-vesuvianite skarn
Associated Minerals at Type Locality:
Synonyms of AkdalaiteHide
This section is currently hidden. Click the show button to view.
Other Language Names for AkdalaiteHide
This section is currently hidden. Click the show button to view.
Relationship of Akdalaite to other SpeciesHide
This section is currently hidden. Click the show button to view.
Other Members of this group:
Common AssociatesHide
This section is currently hidden. Click the show button to view.
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
This section is currently hidden. Click the show button to view.
| 4.FL. | Trébeurdenite | Fe2+2Fe3+4O2(OH)10CO3 · 3H2O | Trig. 3_m_ _(_32/m ) : R_3_m |
|---|---|---|---|
| 4.FL. | Mariakrite | [Ca4Al2(OH)12(H2O)4][Fe2S4] | Tric. 1 : _P_1 |
| 4.FL.05 | Muskoxite | Mg7Fe4O13 · 10H2O | Trig. 3_m_ _(_32/m ) |
| 4.FL.05 | Jamborite | Ni2+1-xCo3+x(OH)2-x(SO4)x · nH2O | Trig. 3_m_ _(_32/m ) : R_3_m |
| 4.FL.05 | Mössbauerite | Fe3+6O4(OH)8[CO3] · 3H2O | Trig. 3 |
| 4.FL.05 | Meixnerite | Mg6Al2(OH)16(OH)2 · 4H2O | Trig. 3_m_ _(_32/m ) : R_3_m |
| 4.FL.05 | Woodallite | Mg6Cr2(OH)16Cl2 · 4H2O | Trig. 3_m_ _(_32/m ) : R_3_m |
| 4.FL.05 | Fougèrite | Fe2+4Fe3+2(OH)12[CO3] · 3H2O | Trig. 3_m_ _(_32/m ) : R_3_m |
| 4.FL.05 | Dritsite | Li2Al4(OH)12Cl2 · 3H2O | Hex. 6/m m m _(_6/_m_2/_m_2/m ) : _P_63/m c m |
| 4.FL.05 | Rotemite | Ca4Cr2(OH)12Cl2 · 4H2O | Trig. 3_m_ _(_32/m ) : R_3_c |
| 4.FL.05 | Iowaite | Mg6Fe3+2(OH)16Cl2 · 4H2O | Trig. 3_m_ _(_32/m ) : R_3_m |
| 4.FL.10 | Hydrocalumite | Ca4Al2(OH)12(Cl,CO3,OH)2 · 4H2O | Mon. 2 : _P_21 |
| 4.FL.15 | Kuzelite | Ca4Al2(OH)12[SO4] · 6H2O | Trig. |
| 4.FL.20 | Jianshuiite | (Mg,Mn,Ca)Mn3O7 · 3H2O | Trig. 3 : _R_3 |
| 4.FL.20 | Ernienickelite | NiMn3O7 · 3H2O | Trig. 3 : _R_3 |
| 4.FL.20 | Aurorite | Mn2+Mn4+3O7 · 3H2O | Trig. 3 : _R_3 |
| 4.FL.20 | Chalcophanite | ZnMn4+3O7 · 3H2O | Trig. 3 : _R_3 |
| 4.FL.25 | Woodruffite | Zn2+x/2(Mn4+1-xMn3+x)O2 · yH2O | Mon. 2/m : _B_2/m |
| 4.FL.30 | Asbolane | (Ni,Co)2-xMn4+(O,OH)4 · nH2O | Hex. |
| 4.FL.30 va | Lampadite | Cu, Mn, O, H | |
| 4.FL.35 | Buserite | Na4Mn14O27 · 21H2O | |
| 4.FL.40 | Takanelite | (Mn,Ca)Mn4O9 · H2O | Hex. |
| 4.FL.40 | Ranciéite | (Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O | Trig. 3 : _P_3 |
| 4.FL.45 | Birnessite | (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O | Mon. 2/m : _B_2/m |
| 4.FL.55 | Cianciulliite | Mn(Mg,Mn)2Zn2(OH)10 · 2-4H2O | Mon. 2/m : _B_2/m |
| 4.FL.60 | Jensenite | Cu3[TeO6] · 2H2O | Mon. 2/m : _P_21/m |
| 4.FL.65 | Leisingite | Cu2MgTe6+O6 · 6H2O | Trig. 3 : _P_3 |
| 4.FL.75 | Cafetite | CaTi2O5 · H2O | Mon. 2/m : _P_21/b |
| 4.FL.80 | Mourite | UMo5O12(OH)10 | Mon. |
| 4.FL.85 | Deloryite | Cu4(UO2)(MoO4)2(OH)6 | Mon. 2/m : _B_2/m |
| 4.FL.90 | Lagalyite | Ca2xMn1-xO2 · 1.5-2H2O | Mon. |
| 4.FL.95 | Tunnerite (of Cornu) | ||
| 4.FL.100 | Carbocalumite | Ca4Al2(OH)12(CO3) · 6H2O | Trig. 3_m_ _(_32/m ) : R_3_c |
| 4.FL.100 | Mampsisite | Ca4Al2(CO3)(OH)12 · 5H2O | Tric. |
Other InformationHide
This section is currently hidden. Click the show button to view.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for AkdalaiteHide
This section is currently hidden. Click the show button to view.
References for AkdalaiteHide
This section is currently hidden. Click the show button to view.
Reference List:
Hwang, Shyh-Lung, Shen, Pouyan, Chu, Hao-Tsu, Yui, Tzen-Fu (2006) A New Occurrence and New Data on Akdalaite, a Retrograde Mineral from UHP Whiteschist, Kokchetav Massif, Northern Kazakhstan. International Geology Review, 48 (8) 754-764 doi:10.2747/0020-6814.48.8.754
Parise, John B., Xia, Bingying, Simonson, Jack W., Woerner, William R., Plonka, Anna M., Phillips, Brian L., Ehm, Lars (2019) Structural Chemistry of Akdalaite, Al10O14(OH)2, the Isostructural Aluminum Analogue of Ferrihydrite. Crystals, 9 (5) 246 doi:10.3390/cryst9050246
Localities for AkdalaiteHide
This section is currently hidden. Click the show button to view.
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 section is currently hidden. Click the show button to view.