Stanĕkite
A valid IMA mineral species
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About Stanĕkite
Josef Stanĕk
Formula:
(Mn2+,Fe2+,Mg)Fe3+(PO4)O
Colour:
Black
Lustre:
Sub-Metallic
Hardness:
4 - 5
Specific Gravity:
0\3.80
Crystal System:
Monoclinic
Member of:
Name:
Named in honor of Josef Stanĕk (1928 - 13 September 2019), Professor of Mineralogy, Masarykov University, Brno, Czech Republic, a specialist in phosphate mineralogy.
Wagnerite Group.
Two polytypes are known: Ma2bc (type material) and Mabc (space group I2/a; Keller et al., 2005).
Two polytypes are known: Ma2bc (type material) and Mabc (space group I2/a; Keller et al., 2005).
Name Encoding
CP1252:
Stanekite
Latin-1:
Stanekite
ASCII-7:
Stanekite
Unique Identifiers
Mindat ID:
7310
Long-form identifier:
mindat:1:1:7310:9
Similar Names
| Sitinakite | A valid IMA mineral species | KNa2Ti4(SiO4)2O5(OH) · 4H2O |
| Stanĕkita | ||
| Zdenĕkite | A valid IMA mineral species | NaPbCu5(AsO4)4Cl · 5H2O |
IMA Classification of Stanĕkite
Approved
IMA Formula:
Fe3+Mn2+O(PO4)
Approval year:
1994
First published:
1997
Type description reference:
Classification of Stanĕkite
8.BB.15
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
B : With only medium-sized cations, (OH, etc.):RO4 about 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
B : With only medium-sized cations, (OH, etc.):RO4 about 1:1
41.6.3.4
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
6 : A2(XO4)Zq
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
6 : A2(XO4)Zq
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Stk | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Skt | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Stanĕkite
Sub-Metallic
Transparency:
Opaque
Colour:
Black
Streak:
Dark brown
Hardness:
4 - 5 on Mohs scale
Tenacity:
Brittle
Parting:
Parting ⊥ [001].
Fracture:
Splintery
Density:
0\3.80 g/cm3 (Measured) 4.09 g/cm3 (Calculated)
Optical Data of Stanĕkite
Type:
Biaxial
RI values:
nα = 2.01 nβ = 2.11
Max. Birefringence:
δ = 0.000
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Anisotropism:
In air, moderate. In oil, distinct and pale brownish-grey colours are visible.
Bireflectance:
Very weak
Colour in reflected light:
Pale gray
Internal Reflections:
Distinct. Reddish yellow to brownish-red.
Pleochroism:
Weak
Comments:
In oil, darker than in air, with a blue-grey hue
Chemistry of Stanĕkite
Mindat Formula:
(Mn2+,Fe2+,Mg)Fe3+(PO4)O
Element Weights:
Crystallography of Stanĕkite
Polytype:
Formula:
Crystal System:
Class (H-M)
Space Group:
Space Group Setting:
Cell Parameters:
Ratio:
Unit Cell Volume (calc):
Z:
Comment:
| Stanĕkite-Ma2bc | Stanĕkite-Mabc |
|---|---|
| (Fe3+,Mn2+,Fe2+,Mg)2[PO4]O | (Fe3+,Mn2+3,Fe32+3,Mg)2[PO4]O |
| Monoclinic | Monoclinic |
| 2/m - Prismatic | 2/m - Prismatic |
| P21/b | |
| P21/a | |
| a = 11.844(3) Å, b = 12.663(3) Å, c = 9.989(3) Å β = 105.93(2)° | a = 11.835(2) Å, b = 6.328(1) Å, c = 9.984(2) Å β = 105.81(3)° |
| a:b:c = 0.935 : 1 : 0.789 | a:b:c = 1.87 : 1 : 1.578 |
| V 1,440.62 ų (Calculated from Unit Cell) | V 719.43 ų (Calculated from Unit Cell) |
| 16 | 8 |
| 12/a |
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.971 Å | (100) |
| 2.810 Å | (85) |
| 2.857 Å | (58) |
| 3.259 Å | (50) |
| 3.412 Å | (38) |
| 5.54 Å | (37) |
| 3.621 Å | (35) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 22 : Hydration and low-? subsurface aqueous alteration (see also #23) |
Type Occurrence of Stanĕkite
Place of Conservation of Type Material:
University of Stuttgart and at the Musee de l'Ecole des Mines de Paris (no T 45634).
Associated Minerals at Type Locality:
Reference:
Synonyms of Stanĕkite
Other Language Names for Stanĕkite
Relationship of Stanĕkite to other Species
Member of:
Other Members of Wagnerite Group:
| Arsenowagnerite | Mg2(AsO4)F | Mon. 2/m : P21/b |
| Hydroxylwagnerite | Mg2(PO4)(OH) | Mon. 2/m : P21/b |
| Joosteite | Mn2+(Mn3+,Fe3+)(PO4)O | Mon. 2/m |
| Sarkinite | Mn2+2(AsO4)(OH) | Mon. 2/m : P21/b |
| Wagnerite | Mg2(PO4)F | Mon. 2/m : P21/b |
| 'Wagnerite-Arsenowagnerite Series' |
Common Associates
Associations Based on Photo Data:
| 3 photos of Stanĕkite associated with Heterosite | Fe3+(PO4) |
| 1 photo of Stanĕkite associated with Phosphosiderite | FePO4 · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 8.BB. | Moabite | NiFe3+(PO4)O |
| 8.BB. | Tilasite | CaMg(AsO4)F |
| 8.BB. | Paulgrothite | Cu9Fe3+O4(PO4)4Cl3 |
| 8.BB. | Karlditmarite | Cu9O4(PO4)2(SO4)2 |
| 8.BB. | Milkovoite | Cu4O(PO4)(AsO4) |
| 8.BB.X | Arsenowagnerite | Mg2(AsO4)F |
| 8.BB.05 | Tavorite | LiFe3+(PO4)(OH) |
| 8.BB.05 | Amblygonite | LiAl(PO4)F |
| 8.BB.05 | Montebrasite | LiAl(PO4)(OH) |
| 8.BB.10 | Zwieselite | Fe2+2(PO4)F |
| 8.BB.10 | Triplite | Mn2+2(PO4)F |
| 8.BB.15 | 'Unnamed (Sb-analogue of Auriacusite)' | Fe3+Cu2+[(Sb,As)O4]O |
| 8.BB.15 | Joosteite | Mn2+(Mn3+,Fe3+)(PO4)O |
| 8.BB.15 | Hydroxylwagnerite | Mg2(PO4)(OH) |
| 8.BB.15 | Wagnerite | Mg2(PO4)F |
| 8.BB.15 | Triploidite | Mn2+2(PO4)(OH) |
| 8.BB.15 | Sarkinite | Mn2+2(AsO4)(OH) |
| 8.BB.15 | Wolfeite | Fe2+2(PO4)(OH) |
| 8.BB.20 | Holtedahlite | Mg2(PO4)(OH) |
| 8.BB.20 | Satterlyite | (Fe2+,Mg,Fe)12(PO4)5(PO3OH)(OH,O)6 |
| 8.BB.25 | Althausite | Mg4(PO4)2(OH,O)(F,◻) |
| 8.BB.30 | Zincolivenite | CuZn(AsO4)(OH) |
| 8.BB.30 | Adamite | Zn2(AsO4)(OH) |
| 8.BB.30 | Libethenite | Cu2(PO4)(OH) |
| 8.BB.30 | Zincolibethenite | CuZn(PO4)(OH) |
| 8.BB.30 | Eveite | Mn2+2(AsO4)(OH) |
| 8.BB.30 | Olivenite | Cu2(AsO4)(OH) |
| 8.BB.30 | Auriacusite | Fe3+Cu2+(AsO4)O |
| 8.BB.35 | Paradamite | Zn2(AsO4)(OH) |
| 8.BB.35 | Tarbuttite | Zn2(PO4)(OH) |
| 8.BB.40 | Barbosalite | Fe2+Fe3+2(PO4)2(OH)2 |
| 8.BB.40 | Scorzalite | Fe2+Al2(PO4)2(OH)2 |
| 8.BB.40 | Lazulite | MgAl2(PO4)2(OH)2 |
| 8.BB.40 | Meizhouite | Fe2+V3+2(PO4)2(OH)2 |
| 8.BB.40 | Hentschelite | CuFe3+2(PO4)2(OH)2 |
| 8.BB.40 | Wilhelmkleinite | ZnFe3+2(AsO4)2(OH)2 |
| 8.BB.45 | Dokuchaevite | Cu8O2(VO4)3Cl3 |
| 8.BB.45 | Trolleite | Al4(PO4)3(OH)3 |
| 8.BB.45 | Yaroshevskite | Cu9O2(VO4)4Cl2 |
| 8.BB.50 | Namibite | Cu(BiO)2(VO4)(OH) |
| 8.BB.50 | Aleutite | [Cu5O2](AsO4)(VO4) · (Cu,K,Pb,Rb,Cs,)Cl |
| 8.BB.52a | Ericlaxmanite | Cu4O(AsO4)2 |
| 8.BB.52b | Kozyrevskite | Cu4O(AsO4)2 |
| 8.BB.55 | Phosphoellenbergerite | (Mg,◻)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6 |
| 8.BB.55 | Popovite | Cu5O2(AsO4)2 |
| 8.BB.60 | Urusovite | CuAl(AsO4)O |
| 8.BB.65 | Theoparacelsite | Cu3(As2O7)(OH)2 |
| 8.BB.70 | Turanite | Cu5(VO4)2(OH)4 |
| 8.BB.75 | Stoiberite | Cu5(VO4)2O2 |
| 8.BB.80 | Fingerite | Cu11(VO4)6O2 |
| 8.BB.85 | Averievite | Cu6(VO4)2O2Cl2 |
| 8.BB.90 | Richellite | CaFe3+2(PO4)2(OH,F)2 |
| 8.BB.90 | Lipscombite | Fe2+Fe3+2(PO4)2(OH)2 |
| 8.BB.90 | Zinclipscombite | ZnFe3+2(PO4)2(OH)2 |
Fluorescence of Stanĕkite
None
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.
Internet Links for Stanĕkite
mindat.org URL:
https://www.mindat.org/min-7310.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Stanĕkite
Reference List:
Keller, Paul, Fontan, François, Velasco Roldan, Francisco, Melgarejo I Draper, Joan Carles (1997) Staněkite, Fe3+(Mn,Fe2+,Mg)(PO4): a new phosphate mineral in pegmatites at Karibib (Namibia) and French Pyrénées (France) European Journal of Mineralogy, 9 (3) 475-482 doi:10.1127/ejm/9/3/0475
Jambor, John L., Grew, Edward S., Roberts, Andrew C. (1998) New mineral names. American Mineralogist, 83 (1) 185-189
Keller, Paul, Lissner, Falk, Schleid, Thomas (2006) The crystal structure of stanekite, (Fe3+,Mn2+,Fe2+,Mg)2[PO4]O, from Okatjimukuju, Karibib (Namibia), and its relationship to the polymorphs of synthetic Fe2[PO4]O. European Journal of Mineralogy, 18 (1) 113-118 doi:10.1127/0935-1221/2006/0018-0113
Keller, Paul, Lissner, Falk, Schleid, Thomas (2007) The crystal structure of joosteite, (Mn2+,Mn3+,Fe3+)2[PO4]O, from the Helikon II Mine, Karibib (Namibia), and its relationship to staneěkite, (Fe3+,Mn2+,Fe2+,Mg)2[PO4]O. Neues Jahrbuch für Mineralogie - Abhandlungen, 184 (2) 225-230 doi:10.1127/0077-7757/2007/0095
Localities for Stanĕkite
Showing 14 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Argentina | |
| Roda-Robles et al. (2012) |
Brazil | |
| Baijot et al. (2014) |
Europe | |
| Keller et al. (1997) | |
France | |
| Berbain et al. (2012) |
Italy | |
| Guastoni et al. (2007) |
Namibia | |
| von Bezing (2007) |
| Keller et al. (1997) |
Poland | |
| Pieczka A. et al. (2004) |
| Pieczka A. et al. (SW Poland, Lower Silesia, Góry Sowie Mts.) |
| Grochowina et al. (2012) +1 other reference | |
Rwanda | |
| Excalibur Mineral Corp. - Mineral News |
Spain | |
| Roda et al. (2001) |
| Encarnación Roda-Robles (2007) |
Switzerland | |
| Vignola et al. (2008) |
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Clementine II pegmatite, Okatjimukuju Farm 55, Karibib Constituency, Erongo Region, Namibia