Wodegongjieite
A valid IMA mineral species
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Formula:
KCa3(Al7Si9)O32
Colour:
whitish to colourless
Lustre:
Vitreous
Hardness:
6
Specific Gravity:
2.694 (Calculated)
Crystal System:
Hexagonal
Name:
The name is based on the Tibetan name (Wode Gongjie) of a famous mountain visible from the area close to the type locality.
Type Locality:
Isostructural with:
Related to kokchetavite and dmisteinbergite.
The Ca(Al7Si9)-analogue of pfaffenbergite; the KCa3(Al7Si9)-analogue of kokchetavite.
The type wodegongjieite is too fine-grained for optical and physical properties to be determined. However, it is expected to have properties similar to the closely related mineral dmisteinbergite.
The Ca(Al7Si9)-analogue of pfaffenbergite; the KCa3(Al7Si9)-analogue of kokchetavite.
The type wodegongjieite is too fine-grained for optical and physical properties to be determined. However, it is expected to have properties similar to the closely related mineral dmisteinbergite.
Unique Identifiers
Mindat ID:
56036
Long-form identifier:
mindat:1:1:56036:8
IMA Classification of Wodegongjieite
Classification of Wodegongjieite
9.FA.
9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
A : Tektosilicates without additional non-tetrahedral anions
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Wgj | 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 Wodegongjieite
Vitreous
Transparency:
Transparent
Colour:
whitish to colourless
Hardness:
6 on Mohs scale
Tenacity:
Brittle
Density:
2.694 g/cm3 (Calculated)
Optical Data of Wodegongjieite
Type:
Uniaxial (+)
Comments:
presumably birefringence ≈ 0.005 and refractive indices ≈ 1.57–1.59;
Chemistry of Wodegongjieite
Mindat Formula:
KCa3(Al7Si9)O32
Element Weights:
Crystallography of Wodegongjieite
Crystal System:
Hexagonal
Class (H-M):
6/mmm(6/m2/m2/m) - Dihexagonal Dipyramidal
Space Group:
P6/mcc
Setting:
P6/mcc
Cell Parameters:
a = 10.2(2) Å, c = 14.9(3) Å
Ratio:
a:c = 1 : 1.461
Unit Cell V:
1,342.51 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.42 Å | (73) |
| 3.80 Å | (91) |
| 3.73 Å | (68) |
| 3.26 Å | (49) |
| 2.85 Å | (100) |
| 2.55 Å | (71) |
| 2.20 Å | (17) |
| 2.12 Å | (26) |
Type Occurrence of Wodegongjieite
General Appearance of Type Material:
Inclusions in corundum as a partial overgrowth (holotype) up to 1.5 μm thick around a spheroid 20 μm across of wenjiite, kangjinlaite, zhiqinite and badengzhuite, and also as pools up to 0.25 μm wide filling interstices between wenjiite, jingsuiite, osbornite-khrambaevite and corundum.
Place of Conservation of Type Material:
Mineralogical collections of the Chinese Geological Museum, Xisiyangrouhutong 15th, Xicheng district, Beijing, China, catalogue number M16104.
Geological Setting of Type Material:
Chromitite orebody in ophiolite.
Associated Minerals at Type Locality:
Synonyms of Wodegongjieite
Other Language Names for Wodegongjieite
Dutch:Wodegongjieiet
German:Wodegongjieit
Related Minerals - Strunz-mindat Grouping
| 9.FA. | Bonaccorsiite | KK2Na3(Al6Si36)O84 |
| 9.FA. | Hexacelsian | BaAl2Si2O8 |
| 9.FA.05 | Panunzite | (K,Na)AlSiO4 |
| 9.FA.05 | Yoshiokaite | (Ca,Na)[Al(Al,Si)O4] |
| 9.FA.05 | Nepheline | Na3K(Al4Si4O16) |
| 9.FA.05 | Trinepheline | NaAlSiO4 |
| 9.FA.05 | Davidsmithite | (Ca,◻)2Na6Al8Si8O32 |
| 9.FA.05 | Kaliophilite | KAlSiO4 |
| 9.FA.05 | Kalsilite | KAlSiO4 |
| 9.FA.05 | 'Carnegieite' | NaAlSiO4 |
| 9.FA.05 | Megakalsilite | KAlSiO4 |
| 9.FA.05 | Trikalsilite | K2NaAl3(SiO4)3 |
| 9.FA.10 | Malinkoite | NaBSiO4 |
| 9.FA.15 | Virgilite | LiAlSi2O6 |
| 9.FA.25 | Lisitsynite | KBSi2O6 |
| 9.FA.30 | Ferrisanidine | K[Fe3+Si3O8] |
| 9.FA.30 | Buddingtonite | (NH4)(AlSi3O8) |
| 9.FA.30 | Rubicline | Rb(AlSi3O8) |
| 9.FA.30 | 'Monalbite' | NaAlSi3O8 |
| 9.FA.30 | Microcline | K(AlSi3O8) |
| 9.FA.30 va | 'Germanate-celsian' | BaAl2Ge2O8 |
| 9.FA.30 | Celsian | Ba(Al2Si2O8) |
| 9.FA.30 | Sanidine | K(AlSi3O8) |
| 9.FA.30 | Orthoclase | K(AlSi3O8) |
| 9.FA.35 | Reedmergnerite | NaBSi3O8 |
| 9.FA.35 | Albite | Na(AlSi3O8) |
| 9.FA.35 | Anorthite | Ca(Al2Si2O8) |
| 9.FA.40 | Paracelsian | Ba(Al2Si2O8) |
| 9.FA.45 | Svyatoslavite | Ca(Al2Si2O8) |
| 9.FA.45 | Kumdykolite | Na(AlSi3O8) |
| 9.FA.50 | Slawsonite | Sr(Al2Si2O8) |
| 9.FA.55 | Lisetite | CaNa2Al4Si4O16 |
| 9.FA.60 | Stronalsite | Na2SrAl4Si4O16 |
| 9.FA.60 | Banalsite | Na2BaAl4Si4O16 |
| 9.FA.65 | Maleevite | BaB2Si2O8 |
| 9.FA.65 | Pekovite | SrB2Si2O8 |
| 9.FA.65 | Danburite | CaB2Si2O8 |
| 9.FA.70 | Liebermannite | KAlSi3O8 |
| 9.FA.70 | Lingunite | NaAlSi3O8 |
| 9.FA.70 | Stöfflerite | CaAl2Si2O8 |
| 9.FA.75 | Pfaffenbergite | KNa3(Al4Si12)O32 |
| 9.FA.75 | Kokchetavite | K(AlSi3O8) |
Radioactivity
Radioactivity:
| Element | % Content | Activity (Bq/kg) | Radiation Type |
|---|---|---|---|
| Uranium (U) | 0.0000% | 0 | α, β, γ |
| Thorium (Th) | 0.0000% | 0 | α, β, γ |
| Potassium (K) | 3.5130% | 1,089 | β, γ |
For comparison:
- Banana: ~15 Bq per fruit
- Granite: 1,000–3,000 Bq/kg
- EU exemption limit: 10,000 Bq/kg
Note: Risk is shown relative to daily recommended maximum exposure to non-background radiation of 1000 µSv/year. Note that natural background radiation averages around 2400 µSv/year so in reality these risks are probably extremely overstated! With infrequent handling and safe storage natural radioactive minerals do not usually pose much risk.
Interactive Simulator:
Note: The mass selector refers to the mass of radioactive mineral present, not the full specimen, also be aware that the matrix may also be radioactive, possibly more radioactive than this mineral!
Activity: –
| Distance | Dose rate | Risk |
|---|---|---|
| 1 cm | ||
| 10 cm | ||
| 1 m |
The external dose rate (D) from a radioactive mineral is estimated by summing the gamma radiation contributions from its Uranium, Thorium, and Potassium content, disregarding daughter-product which may have a significant effect in some cases (eg 'pitchblende'). This involves multiplying the activity (A, in Bq) of each element by its specific gamma ray constant (Γ), which accounts for its unique gamma emissions. The total unshielded dose at 1 cm is then scaled by the square of the distance (r, in cm) and multiplied by a shielding factor (μshield). This calculation provides a 'worst-case' or 'maximum risk' estimate because it assumes the sample is a point source and entirely neglects any self-shielding where radiation is absorbed within the mineral itself, meaning actual doses will typically be lower. The resulting dose rate (D) is expressed in microsieverts per hour (μSv/h).
D = ((AU × ΓU) + (ATh × ΓTh) + (AK × ΓK)) / r2 × μshield
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 Wodegongjieite
mindat.org URL:
https://www.mindat.org/min-56036.html
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References for Wodegongjieite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 67. European Journal of Mineralogy, 34 (3) 359-364 doi:10.5194/ejm-34-359-2022
Mugnaioli, Enrico, Xiong, Fahui, Xu, Xiangzhen, Gemmi, Mauro, Wirth, Richard, Yang, Jingsui, Grew, Edward S. (2022) Wodegongjieite, ideally KCa3(Al7Si9)O32, a new sheet silicate isostructural with the feldspar polymorph kokchetavite, KAlSi3O8. Mineralogical Magazine, 86 (6) 975-987 doi:10.1180/mgm.2022.107
Localities for Wodegongjieite
Showing 3 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 | |
| Zappettini et al. (2023) +1 other reference |
China (TL) | |
| Miyawaki et al. (2022) +1 other reference |
Ukraine | |
| SEMONOVA (2025) |
