Grguricite
A valid IMA mineral species
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About Grguricite
Formula:
CaCr2(CO3)2(OH)4 · 4H2O
Colour:
lilac
Crystal System:
Triclinic
Member of:
Name:
to honor Ben Grguric, Australian geologist/mineralogist
The Cr analogue of alumohydrocalcite. A higher hydrate counterpart of 'Unnamed (Ca-analogue of Petterdite)', also somewhat chemically similar to putnisite.
Identified by chemistry and PXRD similarity with alumohydrocalcite.
Identified by chemistry and PXRD similarity with alumohydrocalcite.
Unique Identifiers
Mindat ID:
54365
Long-form identifier:
mindat:1:1:54365:3
GUID
(UUID V4):
(UUID V4):
839b635a-af29-4a5c-bc0b-2ce748b2abaf
IMA Classification of Grguricite
Approved
Classification of Grguricite
5.DB.
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
B : With large and medium-sized cations
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
B : With large and medium-sized cations
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 |
|---|---|---|
| Ggu | 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 Grguricite
Colour:
lilac
Chemistry of Grguricite
Mindat Formula:
CaCr2(CO3)2(OH)4 · 4H2O
Crystallography of Grguricite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.724(2) Å, b = 6.5304(9) Å, c = 14.646(4) Å
α = 81.682(1)°, β = 83.712(2)°, γ = 86.365(2)°
α = 81.682(1)°, β = 83.712(2)°, γ = 86.365(2)°
Ratio:
a:b:c = 0.877 : 1 : 2.243
Unit Cell V:
537.82 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.208 Å | (45) |
| 6.454 Å | (63) |
| 6.222 Å | (100) |
| 4.039 Å | (40) |
| 3.227 Å | (87) |
| 2.883 Å | (58) |
| 2.648 Å | (47) |
| 2.589 Å | (64) |
Comments:
SCXRD study impossible due to the fine nature of the mineral
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] | |
| 47e : [Vanadates, chromates, manganates] |
Type Occurrence of Grguricite
General Appearance of Type Material:
crusts comprising very fine-grained crystalline aggregates
Place of Conservation of Type Material:
mineralogical collections of the Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom, specimen no. BM2019,5
Geological Setting of Type Material:
Pb-Ba-V mineralization
Other Language Names for Grguricite
German:Grguricit
Relationship of Grguricite to other Species
Member of:
Other Members of this group:
| Alumohydrocalcite | CaAl2(CO3)2(OH)4 · 4H2O | Tric. 1 : P1 |
| Dresserite | BaAl2(CO3)2(OH)4 · H2O | Orth. mmm (2/m 2/m 2/m) |
| Dundasite | PbAl2(CO3)2(OH)4 · H2O | Orth. mmm (2/m 2/m 2/m) |
| Hydrodresserite | BaAl2(CO3)2(OH)4 · 3H2O | Tric. 1 : P1 |
| Kochsándorite | CaAl2(CO3)2(OH)4 · H2O | Orth. mmm (2/m 2/m 2/m) : Pnma |
| Petterdite | PbCr3+2(CO3)2(OH)4 · H2O | Orth. mmm (2/m 2/m 2/m) |
| Strontiodresserite | SrAl2(CO3)2(OH)4 · H2O | Orth. mmm (2/m 2/m 2/m) |
| Unnamed (Ca-analogue of Petterdite) | CaCr3+2(CO3)2(OH)4 · H2O |
Related Minerals - Strunz-mindat Grouping
| 5.DB.05 | Alumohydrocalcite | CaAl2(CO3)2(OH)4 · 4H2O |
| 5.DB.05 | Nasledovite | PbMn3Al4(CO3)4(SO4)O5 · 5H2O |
| 5.DB.05 | Para-alumohydrocalcite | CaAl2(CO3)2(OH)4 · 6H2O |
| 5.DB.05 | UM1977-02-CO:AlCaH | Ca6Al2(CO3)3O6 · 32H2O |
| 5.DB.10 | Dresserite | BaAl2(CO3)2(OH)4 · H2O |
| 5.DB.10 | Dundasite | PbAl2(CO3)2(OH)4 · H2O |
| 5.DB.10 | Montroyalite | Sr4Al8(CO3)3(OH,F)26 · 10-11H2O |
| 5.DB.10 | Strontiodresserite | SrAl2(CO3)2(OH)4 · H2O |
| 5.DB.10 | Petterdite | PbCr3+2(CO3)2(OH)4 · H2O |
| 5.DB.10 | Kochsándorite | CaAl2(CO3)2(OH)4 · H2O |
| 5.DB.10 | Unnamed (Ca-analogue of Petterdite) | CaCr3+2(CO3)2(OH)4 · H2O |
| 5.DB.15 | Hydrodresserite | BaAl2(CO3)2(OH)4 · 3H2O |
| 5.DB.20 | Schuilingite-(Nd) | PbCu(Nd,Gd,Sm,Y)(CO3)3(OH) · 1.5H2O |
| 5.DB.25 | Sergeevite | Ca2Mg11(CO3)9(HCO3)4(OH)4 · 6H2O |
| 5.DB.30 | Szymańskiite | [H3O]+8[Hg2]2+8(Ni,Mg)6[CO3]12(OH)12 · 3H2O |
| 5.DB.35 | Lusernaite-(Y) | Y4Al(CO3)2(OH)10F · 6H2O |
| 5.DB.40 | Putnisite | SrCa4Cr3+8(CO3)8SO4(OH)16 · 23H2O |
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 Grguricite
mindat.org URL:
https://www.mindat.org/min-54365.html
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References for Grguricite
Localities for Grguricite
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.
Greece | |
| Rieck et al. (2022) |
Morocco (TL) | |
| Miyawaki et al. (2020) +1 other reference |
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Adami Mine No. 2, Plaka Mines, Plaka, Lavrion mining district, Lavreotiki, East Attica, Attica, Greece