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Anningite-(Ce)
A valid IMA mineral species
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Mary Anning
Formula:
(Ca0.5Ce4+0.5)(VO4)
Colour:
green
Lustre:
Vitreous
Hardness:
4 - 5
Specific Gravity:
3.887 (Calculated)
Crystal System:
Tetragonal
Member of:
Name:
In honour of Mary Anning (21 May 1799 Lyme Regis in Dorset, England – 9 March 1847), an English fossil collector and pioneering palaeontologist. Among many of her achievements, she was the first to recognize that the so-called "bezoar stones" were actually fossilized excrements, now known as coprolites. As the mineral was found in a coprolite, it is fitting to name it after Mary Anning, as her pioneering work on coprolites laid the foundation for this discovery.
Isostructural with:
Has a xenotime-type structure, in which A cations occupy eight-coordinated structural sites, while V5+ cations reside in isolated tetrahedra sharing corners and edges with the aforementioned dodecahedra.
One of the very rare representatives of minerals with essential tetravalent cerium; others currently (2026) known are cerianite-(Ce), stetindite-(Ce), dyrnaesite-(La) and armellinoite-(Ce).
One of the very rare representatives of minerals with essential tetravalent cerium; others currently (2026) known are cerianite-(Ce), stetindite-(Ce), dyrnaesite-(La) and armellinoite-(Ce).
Unique Identifiers
Mindat ID:
471626
Long-form identifier:
mindat:1:1:471626:2
IMA Classification of Anningite-(Ce)
Approved
IMA Formula:
(Ca0.5Ce4+0.5)(V5+O4)
Approval year:
2024
Type description reference:
Środek, Dorota; Juroszek, Rafał; Cametti, Georgia; Benyoucef, Madani; Bouchemla, Imad; Krzykawski, Tomasz; Salamon, Mariusz A. (2026) Anningite-(Ce), (Ca0.5Ce4+0.5)(VO4), a new mineral from phosphate coprolite of the Gara Samani Formation, Algeria. Mineralogical Magazine, 90 (1). 131-137 doi:10.1180/mgm.2025.10110
Classification of Anningite-(Ce)
8.AD.35
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large 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 for Standard |
|---|---|---|
| Aig-Ce | 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 Anningite-(Ce)
Vitreous
Colour:
Green
Streak:
White
Hardness:
4 - 5 on Mohs scale
Comment:
estimated
Cleavage:
None Observed
Fracture:
Irregular/Uneven, Conchoidal
Density:
3.887 g/cm3 (Calculated)
Chemistry of Anningite-(Ce)
Mindat Formula:
(Ca0.5Ce4+0.5)(VO4)
Element Weights:
Elements listed:
Crystallography of Anningite-(Ce)
Crystal System:
Tetragonal
Class (H-M):
4/mmm(4/m2/m2/m) - Ditetragonal Dipyramidal
Space Group:
I41/amd
Setting:
I41/amd
Cell Parameters:
a = 7.1500(4) Å, c = 6.3343(7) Å
Ratio:
a:c = 1 : 0.886
Unit Cell V:
323.83 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.575 Å | (100) |
| 2.684 Å | (61) |
| 2.528 Å | (14) |
| 2.231 Å | (12) |
| 1.840 Å | (56) |
| 1.788 Å | (16) |
| 1.599 Å | (12) |
| 1.488 Å | (17) |
Reference:
Środek, Dorota; Juroszek, Rafał; Cametti, Georgia; Benyoucef, Madani; Bouchemla, Imad; Krzykawski, Tomasz; Salamon, Mariusz A. (2026) Anningite-(Ce), (Ca0.5Ce4+0.5)(VO4), a new mineral from phosphate coprolite of the Gara Samani Formation, Algeria. Mineralogical Magazine, 90 (1). 131-137 doi:10.1180/mgm.2025.10110
Comments:
Due to the small size of the anningite-(Ce) crystals and the presence of overgrowths of other minerals within the agglomerates, reliable powder diffraction analysis could not be performed. As a result, powder diffraction data were generated from the structural information obtained from single-crystal analysis
Type Occurrence of Anningite-(Ce)
General Appearance of Type Material:
small (typically up to 100 μm in length) sheaf-like aggregates composed of crystals 30–40 μm in length and about 7 μm in diameter.
forms small crystals (30-40 μm in length and about 6-8 μm in width) with a tetragonal columnar habit. The crystals typically occur in compact divergent or radial aggregates up to 100 μm in size
forms small crystals (30-40 μm in length and about 6-8 μm in width) with a tetragonal columnar habit. The crystals typically occur in compact divergent or radial aggregates up to 100 μm in size
Place of Conservation of Type Material:
Type material is deposited in the collections of the Natural History Museum, Reichklarastrasse 10, 55116 Mainz, Germany, catalogue number NHMMZ M 2024/2 LS
Geological Setting of Type Material:
within a phosphate coprolite from the sand-dominated sediments of the Gara Samani Formation, Algeria
Associated Minerals at Type Locality:
Reference:
Środek, Dorota; Juroszek, Rafał; Cametti, Georgia; Benyoucef, Madani; Bouchemla, Imad; Krzykawski, Tomasz; Salamon, Mariusz A. (2026) Anningite-(Ce), (Ca0.5Ce4+0.5)(VO4), a new mineral from phosphate coprolite of the Gara Samani Formation, Algeria. Mineralogical Magazine, 90 (1). 131-137 doi:10.1180/mgm.2025.10110
Synonyms of Anningite-(Ce)
Other Language Names for Anningite-(Ce)
Relationship of Anningite-(Ce) to other Species
Member of:
Other Members of Xenotime Group:
| Chernovite-(Y) | Y(AsO4) | Tet. 4/mmm(4/m2/m2/m) : I41/amd |
| Pretulite | Sc(PO4) | Tet. 4/mmm(4/m2/m2/m) : I41/amd |
| Wakefieldite-(Ce) | Ce(VO4) | Tet. 4/mmm(4/m2/m2/m) : I41/amd |
| Wakefieldite-(La) | La(VO4) | Tet. 4/mmm(4/m2/m2/m) : I41/amd |
| Wakefieldite-(Nd) | Nd(VO4) | Tet. 4/mmm(4/m2/m2/m) : I41/amd |
| Wakefieldite-(Y) | Y(VO4) | Tet. 4/mmm(4/m2/m2/m) : I41/amd |
Related Minerals - Strunz-mindat Grouping
| 8.AD. | 'Unnamed (Monoclinic polymorph of ximengite)' | Bi(PO4) |
| 8.AD. | Keplerite | Ca9(Ca0.5◻0.5)Mg(PO4)7 |
| 8.AD. | Mazorite | Ba3(PO4)2 |
| 8.AD. | Deynekoite | Ca9◻Fe3+(PO4)7 |
| 8.AD. | Monazite-(Gd) | Gd(PO4) |
| 8.AD.05 | Nahpoite | Na2(PO3OH) |
| 8.AD.10 | Weilite | Ca(HAsO4) |
| 8.AD.10 | Švenekite | Ca(H2AsO4)2 |
| 8.AD.10 | Monetite | Ca(PO3OH) |
| 8.AD.15 | Archerite | (K,NH4)(H2PO4) |
| 8.AD.15 | Biphosphammite | NH4(H2PO4) |
| 8.AD.20 | Phosphammite | (NH4)2(PO3OH) |
| 8.AD.25 | Buchwaldite | NaCa(PO4) |
| 8.AD.30 | Schulténite | Pb(HAsO4) |
| 8.AD.35 | Dreyerite | Bi(VO4) |
| 8.AD.35 | Wakefieldite-(La) | La(VO4) |
| 8.AD.35 | Pretulite | Sc(PO4) |
| 8.AD.35 | Wakefieldite-(Ce) | Ce(VO4) |
| 8.AD.35 | Wakefieldite-(Y) | Y(VO4) |
| 8.AD.35 | Xenotime-(Yb) | Yb(PO4) |
| 8.AD.35 | 'Chernovite-(Ce)' | (Ce,Y)(AsO4) |
| 8.AD.35 | Xenotime-(Gd) | Gd(PO4) |
| 8.AD.35 | Chernovite-(Y) | Y(AsO4) |
| 8.AD.35 | Xenotime-(Y) | Y(PO4) |
| 8.AD.35 | Wakefieldite-(Nd) | Nd(VO4) |
| 8.AD.40 | Pucherite | Bi(VO4) |
| 8.AD.45 | Ximengite | Bi(PO4) |
| 8.AD.50 | 'UM2005-35-VO:CaFePSiTh' | (Th,Ca)(VO4,SiO4,PO4) |
| 8.AD.50 | Rooseveltite | Bi(AsO4) |
| 8.AD.50 | Gasparite-(Ce) | Ce(AsO4) |
| 8.AD.50 | Monazite-(Sm) | Sm(PO4) |
| 8.AD.50 | Monazite-(Ce) | Ce(PO4) |
| 8.AD.50 | Monazite-(La) | La(PO4) |
| 8.AD.50 | Monazite-(Nd) | Nd(PO4) |
| 8.AD.50 | Gasparite-(La) | La(AsO4) |
| 8.AD.50 | Cheralite | CaTh(PO4)2 |
| 8.AD.55 | Tetrarooseveltite | Bi(AsO4) |
| 8.AD.60 | Chursinite | [Hg2]2+Hg2+2[AsO4]2 |
| 8.AD.65 | Clinobisvanite | Bi(VO4) |
| 8.AD.70 | Gurimite | Ba3(VO4)2 |
| 8.AD.75 | Picaite | NaCa[AsO3OH][AsO2(OH)2] |
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 Anningite-(Ce)
mindat.org URL:
https://www.mindat.org/min-471626.html
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References for Anningite-(Ce)
Reference List:
Bosi, Ferdinando; Hatert, Frédéric; Pasero, Marco; Mills, Stuart J. (2025) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 83. European Journal of Mineralogy, 37 (1). 75-78 doi:10.5194/ejm-37-75-2025
Środek, Dorota; Juroszek, Rafał; Cametti, Georgia; Benyoucef, Madani; Bouchemla, Imad; Krzykawski, Tomasz; Salamon, Mariusz A. (2026) Anningite-(Ce), (Ca0.5Ce4+0.5)(VO4), a new mineral from phosphate coprolite of the Gara Samani Formation, Algeria. Mineralogical Magazine, 90 (1). 131-137 doi:10.1180/mgm.2025.10110
Localities for Anningite-(Ce)
Showing 1 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.
Algeria (TL) | |
| Bosi et al. (2025) +1 other reference |
