Valleyite
A valid IMA mineral species
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John W. Valley
Formula:
Ca4Fe6O13
Crystal System:
Isometric
Name:
Named in honor of John W. Valley (b. 1948, Massachussetts, USA), professor at the University of Wisconsin–Madison and former President of the Mineralogical Society of America. His "groundbreaking contributions to mineralogy, petrology, and geochemistry have led to a deeper understanding of Earth’s crustal evolution."
Unique Identifiers
Mindat ID:
51963
Long-form identifier:
mindat:1:1:51963:8
IMA Classification of Valleyite
Approved
IMA Formula:
Ca4Fe3+6O13
Approval year:
2017
First published:
2019
Classification of Valleyite
4.BC.30
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
C : With medium-sized and large cations
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
C : With medium-sized and 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 |
|---|---|---|
| Vly | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Chemistry of Valleyite
Mindat Formula:
Ca4Fe6O13
Element Weights:
Elements listed:
Crystallography of Valleyite
Crystal System:
Isometric
Class (H-M):
43m - Hextetrahedral
Space Group:
I43m
Cell Parameters:
a = 8.8852(7) Å
Unit Cell V:
701.46 ų (Calculated from Unit Cell)
Morphology:
{100}, {111}, and {111}
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.287 Å | (57) |
| 4.439 Å | (6) |
| 3.628 Å | (100) |
| 3.139 Å | (9) |
| 2.801 Å | (39) |
| 2.564 Å | (29) |
| 2.375 Å | (12) |
| 2.098 Å | (7) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3a: Earth’s earliest Hadean crust | >4.50 |
| 8 : Mafic igneous rocks | |
| 9 : Lava/xenolith minerals (hornfels, sanidinite facies) |
Type Occurrence of Valleyite
General Appearance of Type Material:
Crystals ~250 to ~500 nm.
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Geology Museum of the Department of Geoscience, University of Wisconsin, 1215West Dayton St., Madison, WI 53706, USA, catalogue number UWGM 4062 and UWGM 4063
Geological Setting of Type Material:
Late Pleistocene basaltic scoria.
Synonyms of Valleyite
Other Language Names for Valleyite
Related Minerals - Strunz-mindat Grouping
| 4.BC. | Abelloemringerite | Cu2Pb2Mn3+Mn4+ 3O11(OH)(H2O)2 · H2O |
| 4.BC. | Ellinaite | CaCr2O4 |
| 4.BC. | Addibischoffite | Ca2Al6Al6O20 |
| 4.BC.5 | Karlleuite | Ca2MnO4 |
| 4.BC.05 | Marokite | CaMn3+2O4 |
| 4.BC.10 | Dmitryivanovite | CaAl2O4 |
| 4.BC.15 | Warkite | Ca2Sc6Al6O20 |
| 4.BC.25 | Kudryavtsevaite | Na3(Mg,Fe)(Fe,Ti)2Ti3O12 |
| 4.BC.30 | Tululite | Ca14(Fe3+,Al)(Al,Zn,Fe3+,Si,P,Mn,Mg)15O36 |
| 4.BC.35 | Krotite | CaAl2O4 |
| 4.BC.40 | Bacaferrite | BaCaFe4O8 |
Other Information
Notes:
Magnetic
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 Valleyite
mindat.org URL:
https://www.mindat.org/min-51963.html
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References for Valleyite
Localities for Valleyite
Showing 2 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.
USA (TL) | |
| Lee et al. (2019) |
| Lee et al. (2019) |
