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
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
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 |
Quick NavTopAbout RichelliteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Geological EnvironmentType Occurrence Other LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Richelle, Visé, Liège, Wallonia, Belgium