UM1990-61-SiO:AlCaHKMnNa
A material that is NOT an approved mineral species
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Formula:
(Ca,Na,K)3Mn24(Si,Al)40O100 · 30H2O
Colour:
greenish-white
Lustre:
Vitreous
Crystal System:
Orthorhombic
Very similar to tamaite, although reported as a ganophyllite-type species.
Later shown to be actually an orthorhombic polymorph of tamaite.
Forms flakes in fan-shaped clusters, 5-7 mm in diameter.
Coexists with parsettensite and nambulite in a chert fragment.
Later shown to be actually an orthorhombic polymorph of tamaite.
Forms flakes in fan-shaped clusters, 5-7 mm in diameter.
Coexists with parsettensite and nambulite in a chert fragment.
Unique Identifiers
Mindat ID:
51746
Long-form identifier:
mindat:1:1:51746:3
GUID
(UUID V4):
(UUID V4):
d63a8840-41d0-4c03-bfd1-7aea194f581e
Physical Properties of UM1990-61-SiO:AlCaHKMnNa
Vitreous
Transparency:
Translucent
Colour:
greenish-white
Streak:
white
Tenacity:
Brittle
Cleavage:
Perfect
pinacoidal
pinacoidal
Parting:
at 60o angles
Optical Data of UM1990-61-SiO:AlCaHKMnNa
Type:
Biaxial
Chemical Properties of UM1990-61-SiO:AlCaHKMnNa
Formula:
(Ca,Na,K)3Mn24(Si,Al)40O100 · 30H2O
Crystallography of UM1990-61-SiO:AlCaHKMnNa
Crystal System:
Orthorhombic
Cell Parameters:
a = 16.782 Å, b = 13.370 Å, c = 25.090 Å
Ratio:
a:b:c = 1.255 : 1 : 1.877
Unit Cell V:
5,629.58 ų (Calculated from Unit Cell)
Comment:
Space group is Pnam or Pna21
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
12.52 Å | (100) |
3.14 Å | (20) |
4.18 Å | (10) |
Comments:
14 peaks as a whole
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.
References for UM1990-61-SiO:AlCaHKMnNa
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mottana, A., Della Ventura, Parodi, G.C., Guidi, G. (1990): A calcian member of the ganophyltite group in the manganiferous metacherts of Molinello mine, Ligula, Italy. Rendiconti Fisiche Accad. Lincei: 9(1): 313-317; in: Jambor, J.L. (1992): New mineral Names. American Mineralogist: 77: 673
Mottana, A., Della Ventura, G., Parodi, G.C., Guidi, G. (1990): A calcian member of the ganophyllite group in the manganiferous metacherts of Molinello mine, Liguria, Italy. Rendiconti Lincei. Scienze Fisiche e Naturali: 1: 3: 313–317.
Hughes, J.M., Rakovan, J., Bracco, R., and Gunter, M.E. (2003) The atomic arrangement of the ganophyllite-group modulated layer silicates asdetermined from the orthorhombic dimorph of tamaite, with the elusive 16.8 Å ganophyllite group superstructure revealed. American Mineralogist: 88: 1324–1330; http://rruff.info/rruff_1.0/uploads/AM88_1324.pdf
Smith, D.G.W., Nickel, E.H. (2007): A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist: 45: 983-1055; http://nrmima.nrm.se (2016)
Internet Links for UM1990-61-SiO:AlCaHKMnNa
mindat.org URL:
https://www.mindat.org/min-51746.html
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Localities for UM1990-61-SiO:AlCaHKMnNa
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.
Italy | |
| Mottana, A., Della Ventura, Parodi, G.C., Guidi, G. (1990): A calcian member of the ganophyltite group in the manganiferous metacherts of Molinello mine, Ligula, Italy. Rendiconti Fisiche Accad. Lincei: 9(1): 313-317; in: Jambor, J.L. (1992): New mineral Names. American Mineralogist: 77: 673 |