Richellite
A valid IMA mineral species - grandfathered - questionable
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About Richellite
Formula:
CaFe3+2(PO4)2(OH,F)2
Colour:
Yellow to yellow-brown, reddish brown
Lustre:
Sub-Vitreous, Greasy
Hardness:
2 - 3
Crystal System:
Amorphous
Name:
For the type locality at Richelle, Liège Province, Belgium.
Type Locality:
Occurs as a secondary (?) mineral in phosphatic sedimentary rocks.
Unique Identifiers
Mindat ID:
3413
Long-form identifier:
mindat:1:1:3413:1
GUID
(UUID V4):
(UUID V4):
efc9eb1c-7bd6-47f3-a602-e38c3f2ca1e8
IMA Classification of Richellite
Approved, 'Grandfathered' (first described prior to 1959), Questionable
First published:
1883
Classification of Richellite
8.BB.90
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
42.13.2.1
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
13 : Miscellaneous
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
13 : Miscellaneous
22.1.27
22 : Phosphates, Arsenates or Vanadates with other Anions
1 : Phosphates, arsenates or vanadates with fluoride
22 : Phosphates, Arsenates or Vanadates with other Anions
1 : Phosphates, arsenates or vanadates with fluoride
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 |
|---|---|---|
| Rhe | 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 Richellite
Sub-Vitreous, Greasy
Transparency:
Translucent
Comment:
Greasy to hornlike.
Colour:
Yellow to yellow-brown, reddish brown
Streak:
Reddish to yellowish brown
Hardness:
2 - 3 on Mohs scale
Optical Data of Richellite
Type:
Isotropic
Chemistry of Richellite
Mindat Formula:
CaFe3+2(PO4)2(OH,F)2
Crystallography of Richellite
Crystal System:
Amorphous
Cell Parameters:
a = 5.18 Å, c = 12.61 Å
Ratio:
a:c = 1 : 2.434
Z:
1
Morphology:
Radial-fibrous globules, foliated or compact. Commonly massive.
Comment:
(Nearly) amorphous (reflections at ~15 and ~5.4 A, both very diffuse and broad). Heated (500°C) material is "tetragonal."
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 21 : Chemically precipitated carbonate, phosphate, iron formations | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Richellite
General Appearance of Type Material:
Creamy yellow masses.
Place of Conservation of Type Material:
University of Liège, Liège, Belgium: #9361, #9375.
Geological Setting of Type Material:
Phosphatic sedimentary rocks
Associated Minerals at Type Locality:
Reference:
Cesàro, G., Despret, G. (1883) La richellite, nouvelle espèce minérale des environs de Visé. Annales de la Société géologique de Belgique: 10: 36-44.
Other Language Names for Richellite
Common Associates
Associated Minerals Based on Photo Data:
| 3 photos of Richellite associated with Delvauxite | CaFe4(PO4,SO4)2(OH)8 · 4-6H2O not confirmed |
| 2 photos of Richellite associated with Smoky Quartz | SiO2 |
| 1 photo of Richellite associated with Quartz | SiO2 |
| 1 photo of Richellite associated with Koninckite | Fe3+PO4 · 3H2O |
| 1 photo of Richellite associated with Eosphorite | Mn2+Al(PO4)(OH)2 · H2O |
Related Minerals - Strunz-mindat Grouping
| 8.BB. | Tilasite | CaMg(AsO4)F |
| 8.BB.X | Arsenowagnerite | Mg2(AsO4)F |
| 8.BB. | Moabite | NiFe3+(PO4)O |
| 8.BB. | Karlditmarite | Cu9O4(PO4)2(SO4)2 |
| 8.BB. | Milkovoite | Cu4O(PO4)(AsO4) |
| 8.BB. | Paulgrothite | Cu9Fe3+O4(PO4)4Cl3 |
| 8.BB.05 | Amblygonite | LiAl(PO4)F |
| 8.BB.05 | Montebrasite | LiAl(PO4)(OH) |
| 8.BB.05 | Tavorite | LiFe3+(PO4)(OH) |
| 8.BB.10 | Triplite | Mn2+2(PO4)F |
| 8.BB.10 | Zwieselite | Fe2+2(PO4)F |
| 8.BB.15 | Sarkinite | Mn2+2(AsO4)(OH) |
| 8.BB.15 | Triploidite | Mn2+2(PO4)(OH) |
| 8.BB.15 | Wagnerite | (Mg,Fe2+)2(PO4)F |
| 8.BB.15 | Wolfeite | Fe2+2(PO4)(OH) |
| 8.BB.15 | Stanĕkite | (Mn2+,Fe2+,Mg)Fe3+(PO4)O |
| 8.BB.15 | Joosteite | Mn2+(Mn3+,Fe3+)(PO4)O |
| 8.BB.15 | Hydroxylwagnerite | Mg2(PO4)(OH) |
| 8.BB.15 | Unnamed (Sb-analogue of Auriacusite) | Fe3+Cu2+[(Sb,As)O4]O |
| 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 | Adamite | Zn2(AsO4)(OH) |
| 8.BB.30 | Eveite | Mn2+2(AsO4)(OH) |
| 8.BB.30 | Libethenite | Cu2(PO4)(OH) |
| 8.BB.30 | Olivenite | Cu2(AsO4)(OH) |
| 8.BB.30 | Zincolibethenite | CuZn(PO4)(OH) |
| 8.BB.30 | Zincolivenite | CuZn(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 | Hentschelite | CuFe3+2(PO4)2(OH)2 |
| 8.BB.40 | Lazulite | MgAl2(PO4)2(OH)2 |
| 8.BB.40 | Scorzalite | Fe2+Al2(PO4)2(OH)2 |
| 8.BB.40 | Wilhelmkleinite | ZnFe3+2(AsO4)2(OH)2 |
| 8.BB.45 | Trolleite | Al4(PO4)3(OH)3 |
| 8.BB.45 | Yaroshevskite | Cu9O2(VO4)4Cl2 |
| 8.BB.45 | Dokuchaevite | Cu8O2(VO4)3Cl3 |
| 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 | Lipscombite | Fe2+Fe3+2(PO4)2(OH)2 |
| 8.BB.90 | Zinclipscombite | ZnFe3+2(PO4)2(OH)2 |
Other Information
Notes:
Readily soluble in acids.
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 Richellite
mindat.org URL:
https://www.mindat.org/min-3413.html
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References for Richellite
Reference List:
Localities for Richellite
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.
Belgium (TL) | |
| Cesàro et al. (1883) +6 other references |
| Blondieau (2012) |
Spain | |
| Bareche (2005) |
USA | |
| Jensen et al. (1995) |
| Mineralogical Record 26:467 |
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Richelle, Visé, Liège, Wallonia, Belgium