Krieselite (original) (raw)
A valid IMA mineral species
About KrieseliteHide
This section is currently hidden. Click the show button to view.
Some of the Al is replaced by Ga, and some of the F by OH.
Specific Gravity:
4.069 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in honour of Friedrich Wilhelm Kriesel (7 September 1888 - 20 September 1927), who was the chief chemist and head of the Tsumeb mine laboratory around 1920.
Ge analogue of Topaz.
The OH-dominant analogue of krieselite is known as a synthetic compound.
Unique IdentifiersHide
This section is currently hidden. Click the show button to view.
Long-form identifier:
mindat:1:1:27545:1
62494a32-4673-4553-b7d3-fa388c8f39b0
IMA Classification of KrieseliteHide
This section is currently hidden. Click the show button to view.
Type description reference:
Schlüter, Jochen, Geisler, Thorsten, Pohl, Dieter, Stephan, Thomas (2010) Krieselite, Al2GeO4(F,OH)2: A new mineral from the Tsumeb mine, Namibia, representing the Ge analogue of topaz. Neues Jahrbuch für Mineralogie - Abhandlungen, 187 (1) 33-40 doi:10.1127/0077-7757/2010/0160
Classification of KrieseliteHide
This section is currently hidden. Click the show button to view.
9.AF.20
9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
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 |
|---|---|---|
| Kes | 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 KrieseliteHide
This section is currently hidden. Click the show button to view.
Hardness:
VHN100=473 - 566 - Vickers
Density:
4.069 g/cm3 (Calculated)
Optical Data of KrieseliteHide
This section is currently hidden. Click the show button to view.
δ = 0.000
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Comments:
The main refractive index calculated from the Gladstone-Dale relationship.
Chemistry of KrieseliteHide
This section is currently hidden. Click the show button to view.
Mindat Formula:
Al2(GeO4)F2
Some of the Al is replaced by Ga, and some of the F by OH.
Crystallography of KrieseliteHide
This section is currently hidden. Click the show button to view.
Crystal System:
Orthorhombic
Class (H-M):
m m m _(_2/_m_2/_m_2/m ) - Dipyramidal
Cell Parameters:
a = 9.1111 Å, b = 8.5276 Å, c = 4.8064 Å
Ratio:
a:b:c = 1.068 : 1 : 0.564
Morphology:
Observed forms: {001} and ~{110}.
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) |
|---|---|---|---|---|---|---|---|
| 0006702 | Krieselite | Wunder B, Marler B (1997) Ge-analogues of aluminium silicates: High-pressure synthesis and properties of orthorhombic Al2GeO4(OH)2 European Journal of Mineralogy 9 1147-1158 | 1997 | 0 | 293 | ||
| 0018650 | Krieselite | Marler B, Wunder B (1998) Crystal structure of dialuminium dihydroxogermanate, Al2GeO4(OH)2 Zeitschrift fur Kristallographie 213 3-3 | 1998 | synthetic | 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 |
|---|---|
| 3.811 Å | (78) |
| 3.315 Å | (48) |
| 3.016 Å | (100) |
| 2.464 Å | (24) |
| 2.417 Å | (27) |
| 2.247 Å | (38) |
| 1.398 Å | (29) |
Comments:
From type description.
Geological EnvironmentHide
This section is currently hidden. Click the show button to view.
Type Occurrence of KrieseliteHide
This section is currently hidden. Click the show button to view.
General Appearance of Type Material:
Hemispherical aggregates and crusts. Fibers are up to 50 × 5 μm and form wedge-shaped aggregates of fine lamellae.
Place of Conservation of Type Material:
Mineralogical Museum of the University of Hamburg, Hamburg, Germany.
Geological Setting of Type Material:
In tiny vugs of tennantite-chalcocite-galena-germanite ore.
Associated Minerals at Type Locality:
Reference:
Schlüter, J., Geisler, T., Pohl, D., Thomas, S. (2010): Krieselite, Al2GeO4(F,OH)2: A new mineral from the Tsumeb mine, Namibia, representing the Ge analogue of topaz. Neues Jahrbuch fur Mineralogie - Abhandlungen, 187, 33-40.
Synonyms of KrieseliteHide
This section is currently hidden. Click the show button to view.
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.
| 9.AF. | Chegemite | Ca7(SiO4)3(OH)2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
|---|---|---|---|
| 9.AF. | Barwoodite | Mn2+6Nb5+(SiO4)2O3(OH)3 | Trig. 3 : _P_3 |
| 9.AF. | Jingwenite-(Y) | YAlV4+(SiO4)O2(OH)2 | Mon. 2/m |
| 9.AF.05 | Sillimanite | Al2(SiO4)O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.AF.05 | Xenolite | Al10Si8O31 | |
| 9.AF.10 | Andalusite | Al2(SiO4)O | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 9.AF.10 | Kanonaite | Mn3+Al(SiO4)O | Orth. m m m _(_2/_m_2/_m_2/m ) : P n n m |
| 9.AF.15 | Kyanite | Al2(SiO4)O | Tric. 1 : _P_1 |
| 9.AF.20 | Mullite | Al4+2xSi2-2xO10-x | Orth. m m m _(_2/_m_2/_m_2/m ) : P b a m |
| 9.AF.23 | Boromullite | Al9BSi2O19 | Orth. m _m_2 : C m _c_21 |
| 9.AF.25 | Yoderite | Mg(Al,Fe3+)3(SiO4)2O(OH) | Mon. 2/m : _P_21/m |
| 9.AF.30 | Magnesiostaurolite | Mg(Mg,Li)3(Al,Mg)18Si8O44(OH)4 | Mon. 2/m : _B_2/m |
| 9.AF.30 | Staurolite | Fe2+2Al9Si4O23(OH) | Mon. 2/m : _B_2/m |
| 9.AF.30 | Zincostaurolite | Zn2Al9Si4O23(OH) | Mon. 2/m : _B_2/m |
| 9.AF.35 | Topaz | Al2(SiO4)(F,OH)2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.AF.40 | Norbergite | Mg3(SiO4)F2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.AF.45 | Alleghanyite | Mn2+5(SiO4)2(OH)2 | Mon. 2/m : _P_21/b |
| 9.AF.45 | Chondrodite | Mg5(SiO4)2F2 | Mon. 2/m : _P_21/b |
| 9.AF.45 | Reinhardbraunsite | Ca5(SiO4)2(OH,F)2 | Mon. 2/m : _P_21/b |
| 9.AF.45 | Kumtyubeite | Ca5(SiO4)2F2 | Mon. 2/m : _P_21/b |
| 9.AF.45 | Hydroxylchondrodite | Mg5(SiO4)2(OH)2 | Mon. 2/m : _P_21/b |
| 9.AF.50 | Humite | Mg7(SiO4)3F2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
| 9.AF.50 | Manganhumite | (Mn2+,Mg)7(SiO4)3(OH)2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.AF.50 | Unnamed (Ca-analogue of Humite) | Ca7(SiO4)4F2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.AF.50 | Fluorchegemite | Ca7(SiO4)3F2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.AF.50 | Unnamed (OH-analogue of humite) | Mg7(SiO4)3(OH)2 | Orth. |
| 9.AF.55 | Clinohumite | Mg9(SiO4)4F2 | Mon. 2/m : _P_21/b |
| 9.AF.55 | Sonolite | Mn2+9(SiO4)4(OH)2 | Mon. 2/m : _P_21/b |
| 9.AF.55 | Hydroxylclinohumite | Mg9(SiO4)4(OH)2 | Mon. 2/m : _P_21/b |
| 9.AF.60 | Leucophoenicite | Mn2+7(SiO4)3(OH)2 | Mon. 2/m : _P_21/b |
| 9.AF.65 | Ribbeite | Mn2+5(SiO4)2(OH)2 | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 9.AF.70 | Jerrygibbsite | Mn2+9(SiO4)4(OH)2 | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c n |
| 9.AF.75 | Franciscanite | Mn2+6(V5+,◻)2(SiO4)2(O,OH)6 | Trig. 3 : _P_3 |
| 9.AF.75 | Örebroite | Mn2+3(Sb5+,Fe3+)(SiO4)(O,OH)3 | Trig. 3 : _P_3 |
| 9.AF.75 | Welinite | Mn2+6(W6+,Mg)2(SiO4)2(O,OH)6 | Trig. 3 : _P_3 |
| 9.AF.75 | Scorticoite | Mn6(Sb,◻)Σ2(SiO4)2O3(OH)3 | Trig. 3 : _P_3 |
| 9.AF.80 | Ellenbergerite | Mg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10 | Hex. 6 : _P_63 |
| 9.AF.85 | Chloritoid | Fe2+Al2O(SiO4)(OH)2 | Mon. 2/m : _B_2/b |
| 9.AF.85 | Magnesiochloritoid | MgAl2O(SiO4)(OH)2 | Mon. 2/m : _B_2/b |
| 9.AF.85 | Ottrélite | Mn2+Al2O(SiO4)(OH)2 | Mon. |
| 9.AF.90 | Poldervaartite | CaCa[SiO3(OH)](OH) | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 9.AF.90 | Olmiite | CaMn2+[SiO3(OH)](OH) | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 9.AF.95 | Pilawite-(Y) | Ca2Y2Al4(SiO4)4O2(OH)2 | Mon. 2/m : _P_21/b |
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 KrieseliteHide
This section is currently hidden. Click the show button to view.
References for KrieseliteHide
This section is currently hidden. Click the show button to view.
Reference List:
Schlüter, Jochen, Geisler, Thorsten, Pohl, Dieter, Stephan, Thomas (2010) Krieselite, Al2GeO4(F,OH)2: A new mineral from the Tsumeb mine, Namibia, representing the Ge analogue of topaz. Neues Jahrbuch für Mineralogie - Abhandlungen, 187 (1) 33-40 doi:10.1127/0077-7757/2010/0160
Localities for KrieseliteHide
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.
- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
| Namibia (TL) | |
|---|---|
| Oshikoto Region Tsumeb ⓘ Tsumeb Mine (Ongopolo Mine) (TL) | Schlüter et al. (2010) |