Donate now to keep alive!Help|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on Mindat
What is a mineral?The most common minerals on earthMineral PhotographyThe Elements and their MineralsGeological TimeMineral Evolution
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery
Pedro Alves May 22, 2012 09:07PM
what's the actual situation of the Fluorarrojadite-(NaFe)?

I've analysed a specimen (EDS) with this result:
O 27.29
F 6.27
Na 3.16
Mg 0.71
Al 11.21
P 16.42
Ca 25.78
Fe 2.20

The morphology match also.

Pedro Alves
Uwe Kolitsch May 23, 2012 04:21PM
Arrojadite-group minerals must be checked/identified by quantitative chemical analysis and XRD studies (at least).
Pedro Alves May 23, 2012 07:23PM
thanks for your intervention.
I was just curious about the actual situation of some minerals of the arrojadite group. Of course, only by EDS it's not posible to caracterize the species.
Anyway i'm sorry for the stupid and precipitated post. Looking the values, even with semiquantitative analysis, it could never be a member of the arrojadite group (no Fe or Mn enough to M position-13).
By other side, the values fit nicelly with Morinite's chemical composition. Again, we need to confirm with structural analysis.

Sorry again,

Uwe Kolitsch May 24, 2012 08:17AM
Hi Pedro, no worries.
Pedro Alves June 04, 2012 02:44PM
Hello again,
it's Morinite!
Confirmed by p-XRD.

Sorry, only registered users may post in this forum.

Click here to login

Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © and the Hudson Institute of Mineralogy 1993-2018, except where stated. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: January 18, 2018 02:06:45
Go to top of page