Agricolaite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Agricolaite
Georgius Agricola
Formula:
K4(UO2)(CO3)3
Colour:
Yellow
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
3.531 (Calculated)
Crystal System:
Monoclinic
Name:
Named in 2011 by R. Skála, P. Ondruš, F. Veselovský, I. Císařová, and J. Hloušek, in honor of Georgius Agricola (Glauchau, 24 March 1494 - Chemnitz, 21 November 1555), German scholar and scientist. He is considered the "father of mineralogy."
Unique Identifiers
Mindat ID:
39868
Long-form identifier:
mindat:1:1:39868:2
Similar Names
| Agricolite | A synonym of Eulytine |
IMA Classification of Agricolaite
Approved
IMA Formula:
K4(U6+O2)(CO3)3
Approval year:
2010
First published:
2011
Classification of Agricolaite
5.ED.50
5 : CARBONATES (NITRATES)
E : Uranyl Carbonates
D : UO2:CO3 = 1:3
5 : CARBONATES (NITRATES)
E : Uranyl Carbonates
D : UO2:CO3 = 1:3
14.4.8.2
14 : ANHYDROUS NORMAL CARBONATES
4 : Miscellaneous
14 : ANHYDROUS NORMAL CARBONATES
4 : Miscellaneous
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 |
|---|---|---|
| Agc | 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 Agricolaite
Vitreous
Transparency:
Translucent
Colour:
Yellow
Streak:
Pale yellow
Hardness:
4 on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
none
Fracture:
Irregular/Uneven
Density:
3.531 g/cm3 (Calculated)
Comment:
Measured value is greater than 3.3
Chemistry of Agricolaite
Mindat Formula:
K4(UO2)(CO3)3
Element Weights:
Elements listed:
Crystallography of Agricolaite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 10.2380(2) Å, b = 9.1930(2) Å, c = 12.2110(3) Å
β = 95.108(2)°
β = 95.108(2)°
Ratio:
a:b:c = 1.114 : 1 : 1.328
Unit Cell V:
1144.71 ų
Z:
4
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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
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
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0018661 | Agricolaite | Skala R, Ondrus P, Veselovsky F, Cisarova I, Hlousek J (2011) Agricolaite, a new mineral of uranium from Jachymov, Czech Republic Mineralogy and Petrology 103 169-175 | 2011 | Jachymov, Czech Republic | 0 | 293 | |
| 0012225 | Agricolaite | Han J C, Rong S B, Chen Q M, Wu X R (1990) The determination of the crystal structure of tetrapotassium uranyl tricarbonate by powder X-ray diffraction method Chinese Journal of Chemistry 4 313-318 | 1990 | synthetic | 0 | 293 | |
| 0012166 | Agricolaite | Anderson A, Chieh C, Irish D E, Tong J P K (1980) An X-ray crystallographic, Raman, and infrared spectral study of crystalline potassium uranyl carbonate, K4UO2(CO3)3 Canadian Journal of Chemistry 58 1651-1658 | 1980 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.061 Å | (55) |
| 5.793 Å | (30) |
| 5.087 Å | (57) |
| 3.740 Å | (100) |
| 3.393 Å | (44) |
| 2.408 Å | (33) |
| 2.281 Å | (52) |
| 1.873 Å | (40) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47c : [Carbonates, phosphates, borates, nitrates] | |
| 47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Agricolaite
General Appearance of Type Material:
Isolated equant irregular translucent grains to 0.3 mm.
Place of Conservation of Type Material:
National Museum in Prague, Czech Republic, under the catalogue number P1p 17/2009.
Geological Setting of Type Material:
In vugs of ankerite gangue in gneisses.
Associated Minerals at Type Locality:
Synonyms of Agricolaite
Other Language Names for Agricolaite
Related Minerals - Strunz-mindat Grouping
| 5.ED. | Szilagyiite | NaCa3(UO2)(CO3)3(SeO3)F(H2O)6 |
| 5.ED. | Pendevilleite-(Y) | Mg2Y3Al(UO2)2(CO3)7(OH)6(H2O)16 |
| 5.ED. | Paramarkeyite | Ca2(UO2)(CO3)3 · 5H2O |
| 5.ED.05 | Bayleyite | Mg2(UO2)(CO3)3 · 18H2O |
| 5.ED.10 | Swartzite | MgCa(UO2)(CO3)3 · 12H2O |
| 5.ED.15 | Albrechtschraufite | Ca4Mg(UO2)2(CO3)6F2 · 17-18H2O |
| 5.ED.20 | Liebigite | Ca2(UO2)(CO3)3 · 11H2O |
| 5.ED.25 | Rabbittite | Ca3Mg3(UO2)2(CO3)6(OH)4 · 18H2O |
| 5.ED.30 | Andersonite | Na2Ca(UO2)(CO3)3 · 5.33H2O |
| 5.ED.35 | Grimselite | K3Na(UO2)(CO3)3 · H2O |
| 5.ED.40 | Widenmannite | Pb2(OH)2[(UO2)(CO3)2] |
| 5.ED.45 | Znucalite | Zn10Ca0.83(UO2)0.83(CO3)4(OH)15.31(H2O)5.48 |
| 5.ED.50 | Čejkaite | Na4(UO2)(CO3)3 |
| 5.ED.55 | Línekite | K2Ca3[(UO2)(CO3)3]2 · 8H2O |
| 5.ED.55 | Braunerite | K2Ca(UO2)(CO3)3 · 6H2O |
| 5.ED.60 | Leószilárdite | Na6Mg(UO2)2(CO3)6 · 6H2O |
| 5.ED.65 | Pseudomarkeyite | Ca8(UO2)4(CO3)12 · 21H2O |
| 5.ED.65 | Natromarkeyite | Na2Ca8(UO2)4(CO3)13 · 27H2O |
| 5.ED.65 | Markeyite | Ca9(UO2)4(CO3)13 · 28H2O |
| 5.ED.70 | Paddlewheelite | MgCa5Cu2(UO2)4(CO3)12(H2O)33 |
Radioactivity
Radioactivity:
| Element | % Content | Activity (Bq/kg) | Radiation Type |
|---|---|---|---|
| Uranium (U) | 39.2497% | 9,812,425 | α, β, γ |
| Thorium (Th) | 0.0000% | 0 | α, β, γ |
| Potassium (K) | 25.7884% | 7,994 | 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
Fluorescence of Agricolaite
Not fluorescent
Other Information
Notes:
Water soluble
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 Agricolaite
mindat.org URL:
https://www.mindat.org/min-39868.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Agricolaite
Localities for Agricolaite
Showing 4 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.
Czech Republic (TL) | |
| Skála et al. (2011) |
| Thorne (n.d.) | |
| Plášil et al. (2017) |
Spain | |
| Castillo-Oliver et al. (2019) |
Quick NavTopAbout AgricolaiteUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesStrunz-MindatRadioactivityFluorescence Other InformationInternet Links References Localities Locality List
Rovnost Mine, Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic