Straczekite (original) (raw)
A valid IMA mineral species
About StraczekiteHide
This section is currently hidden. Click the show button to view.
Formula:
(Ca,K,Ba)(V5+,V4+)8O20 · 3H2O
Specific Gravity:
3.09 - 3.29
Crystal System:
Monoclinic
Name:
Named in honor of John A. Straczek (13 September 1914, Washington, USA - 2 November 2003, Connecticut, USA), chief geologist, Union Carbide Corporation, who made possible the study of the mineral. Pronounced strā'chek-ite. *Birth/death details, other than birth year, unverified.
This page provides mineralogical data about Straczekite.
Unique IdentifiersHide
This section is currently hidden. Click the show button to view.
Long-form identifier:
mindat:1:1:3796:5
e7bb4912-dca4-4a70-b699-979a64cf6905
IMA Classification of StraczekiteHide
This section is currently hidden. Click the show button to view.
Type description reference:
Classification of StraczekiteHide
This section is currently hidden. Click the show button to view.
4.HE.20
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
E : Phyllovanadates
47.3.2.1
47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts
21.2.15
21 : Vanadates (and vanadates with arsenate or phosphate)
2 : Vanadates of Mg, Ca, Sr or Ba
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 |
|---|---|---|
| Szk | 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 StraczekiteHide
This section is currently hidden. Click the show button to view.
Density:
3.09 - 3.29 g/cm3 (Measured) 3.21 g/cm3 (Calculated)
Optical Data of StraczekiteHide
This section is currently hidden. Click the show button to view.
δ = 2.000
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Dispersion:
relatively weak
Comments:
apple-green to olive-green
Chemistry of StraczekiteHide
This section is currently hidden. Click the show button to view.
Mindat Formula:
(Ca,K,Ba)(V5+,V4+)8O20 · 3H2O
Crystallography of StraczekiteHide
This section is currently hidden. Click the show button to view.
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 11.679(3) Å, b = 3.6608(4) Å, c = 10.636(2) Å
β = 100.53(4)°
Ratio:
a:b:c = 3.19 : 1 : 2.905
Unit Cell V:
447.08 ų (Calculated from Unit Cell)
Twinning:
On {001}, possible, observed by X-ray diffraction.
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) |
|---|---|---|---|---|---|---|---|
| 0010852 | Straczekite | Kutoglu A (1983) Kristallstruktur der calcium-vanadium-bronze CaxV4+2xV5+(2-2x)O5 Zeitschrift fur Kristallographie 162 263-272 |  |
1983 | 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 |
|---|---|
| 10.449 Å | (50) |
| 3.486 Å | (100) |
| 3.255 Å | (10) |
| 2.492 Å | (10) |
| 1.9437 Å | (15) |
| 1.8306 Å | (50) |
| 1.8030 Å | (10) |
Geological EnvironmentHide
This section is currently hidden. Click the show button to view.
Type Occurrence of StraczekiteHide
This section is currently hidden. Click the show button to view.
General Appearance of Type Material:
Dark greenish-black crystals as thin laths up to 0.5 mm in length, forming thick masses.
Place of Conservation of Type Material:
No designated type material.
Geological Setting of Type Material:
A rare secondary mineral in fibrous seams in gangue.
Associated Minerals at Type Locality:
Reference:
Evans, Jr., H.T., Nord, G., Marinenko, J. and Milton, C. (1984) Straczekite, a new calcium barium potassium vanadate mineral from Wilson Springs, Arkansas. Mineralogical Magazine: 48: 289-293.
Synonyms of StraczekiteHide
This section is currently hidden. Click the show button to view.
Other Language Names for StraczekiteHide
This section is currently hidden. Click the show button to view.
Relationship of Straczekite to other SpeciesHide
This section is currently hidden. Click the show button to view.
Other Members of this group:
| Bariandite | Al0.6(V5+,V4+)8O20 · 9H2O | Mon. |
|---|---|---|
| Bokite | (Al,Fe)1.3(V5+,V4+,Fe3+)8O20 · 7.5H2O | Mon. |
| Corvusite | (Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O | Mon. 2/m : _B_2/m |
| Fernandinite | (Ca,K)(V5+,V4+,Fe2+)8O20 · 10H2O | Mon. 2/m : _B_2/m |
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.HE.05 | Melanovanadite | Ca(V5+,V4+)4O10 · 5H2O | Tric. 1 : _P_1 |
|---|---|---|---|
| 4.HE.10 | Shcherbinaite | V5+2O5 | Orth. m m m _(_2/_m_2/_m_2/m ) : P m m n |
| 4.HE.15 | Hewettite | CaV6O16 · 9H2O | Mon. 2/m : _P_21/m |
| 4.HE.15 | Metahewettite | CaV6O16 · 3H2O | Mon. 2/m |
| 4.HE.20 | Bariandite | Al0.6(V5+,V4+)8O20 · 9H2O | Mon. |
| 4.HE.20 | Bokite | (Al,Fe)1.3(V5+,V4+,Fe3+)8O20 · 7.5H2O | Mon. |
| 4.HE.20 | Corvusite | (Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O | Mon. 2/m : _B_2/m |
| 4.HE.20 | Fernandinite | (Ca,K)(V5+,V4+,Fe2+)8O20 · 10H2O | Mon. 2/m : _B_2/m |
| 4.HE.25 | Häggite | V3+V4+O2(OH)3 | Mon. 2/m : _B_2/m |
| 4.HE.30 | Doloresite | V4+3O4(OH)4 | Mon. 2/m : _B_2/m |
| 4.HE.35 | Duttonite | V4+O(OH)2 | Mon. 2/m |
| 4.HE.40 | Cavoite | CaV4+3O7 | Orth. m m m _(_2/_m_2/_m_2/m ) : P n m a |
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 StraczekiteHide
This section is currently hidden. Click the show button to view.
References for StraczekiteHide
This section is currently hidden. Click the show button to view.
Reference List:
Dunn, Pete J., Fleischer, Michael, Langley, Richard H., Shigley, James E., Zilczer, Janet A. (1985) New mineral names. American Mineralogist, 70 (7-8) 871-881
Localities for StraczekiteHide
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.
| Germany | |
|---|---|
| Thuringia Greiz District Kauern ⓘ Lichtenberg Absetzer dump | Witzke et al. (2001) |
| USA | |
| Arizona Apache County Cane Valley Mining District Yazzie Mesa Monument No. 2 channel ⓘ Monument No. 2 Mine | Evans et al. (1990) +1 other reference |
| Arkansas Garland County Wilson Springs (Potash Sulfur Springs) Union Carbide Mine ⓘ North Wilson pit (TL) | Howard +2 other references |
| Utah San Juan County La Sal Mining District ⓘ Pandora Mine |