SUPPORT US. If mindat.org is important to you, click here to donate to our Fall 2019 fundraiser!
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography

UM1990-61-SiO:AlCaHKMnNa

This page is currently not sponsored. Click here to sponsor this page.
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.


Hide all sections | Show all sections

Physical Properties of UM1990-61-SiO:AlCaHKMnNaHide

Vitreous
Transparency:
Translucent
Colour:
greenish-white
Streak:
white
Tenacity:
Brittle
Cleavage:
Perfect
pinacoidal
Parting:
at 60o angles

Optical Data of UM1990-61-SiO:AlCaHKMnNaHide

Type:
Biaxial

Chemical Properties of UM1990-61-SiO:AlCaHKMnNaHide

Formula:
(Ca,Na,K)3Mn24(Si,Al)40O100•30H2O

Crystallography of UM1990-61-SiO:AlCaHKMnNaHide

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 DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
12.52(100)
3.14(20)
4.18(10)
Comments:
14 peaks as a whole

Other InformationHide

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:AlCaHKMnNaHide

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:AlCaHKMnNaHide

Localities for UM1990-61-SiO:AlCaHKMnNaHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Italy
 
  • Liguria
    • Genova Province
      • Graveglia Valley
        • Ne
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
 
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: December 16, 2019 07:57:46 Page generated: May 28, 2019 06:10:03
Go to top of page