Spiroffite Group
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About Spiroffite Group
Formula:
M2Te4+3O8
A group of monoclinic Te(IV) oxides with the general formula given above, where M denotes a medium-sized divalent cation. The structure contains sheets of corner-sharing (M2O10) units, composed of two edge-sharing (MO6) octahedra, which are cross-linked into a framework by Te4+ cations. Similar motifs are found in the structures of denningite, where Te4+ cations are cross-linking chains of (MnO6) and (CaO8) polyhedra, and nissonite, which contains sheets of identical structure but different composition.
Numerous synthetic members of this group are known.
Numerous synthetic members of this group are known.
Unique Identifiers
Mindat ID:
40378
Long-form identifier:
mindat:1:1:40378:0
Chemistry of Spiroffite Group
Mindat Formula:
M2Te4+3O8
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005504 | Spiroffite | Cooper M A, Hawthorne F C (1996) The crystal structure of spiroffite The Canadian Mineralogist 34 821-826 |  | 1996 | Moctezuma, Sonora, Mexico | 0 | 293 |
CIF Raw Data - click here to close
Other Language Names for Spiroffite Group
Relationship of Spiroffite Group to other Species
Spiroffite Group Members:
| Spiroffite | Mn2+2Te4+3O8 | Mon. 2/m : B2/b |
| Zincospiroffite | Zn2Te4+3O8 | Mon. 2/m : B2/b |
Minerals structurally related to group:
| Denningite | (Mn2+,Ca,Zn)Te4+2O5 | |
| Nissonite | Cu2Mg2(PO4)2(OH)2 · 5H2O |
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 Spiroffite Group
mindat.org URL:
https://www.mindat.org/min-40378.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Spiroffite Group
Reference List:
Localities for Spiroffite Group
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.
Moctezuma Mine, Moctezuma, Moctezuma Municipality, Sonora, Mexico