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Mineralogical Classification

The scientific classification of mineral species. For ID questions see Identity Help in How To section 
Subject Posts Last Post

Gersdorffite - what happened?

by Jeff Weissman
5 05/22/2018 09:47AM
Last Post by Uwe Kolitsch

IMA 2017-F = montbrayite crystal structure and redefinition

by Marco E. Ciriotti
1 05/21/2018 09:26PM
Last Post by Marco E. Ciriotti

Orthoclase var. Paradoxite

by Ed Clopton
18 05/21/2018 01:06PM
Last Post by Jolyon & Katya Ralph

The crystal structure of schoepite revisited

by Luc Vandenberghe
1 05/05/2018 03:59PM
Last Post by Luc Vandenberghe
This topic has been moved.

Need help Identifying my rock Attachments

by Chris Silva
  This topic has been moved.

Structure of low-order hemimorphite produced in a Zn-rich environment by cyanobacterium Leptolingbya frigida

by Marco E. Ciriotti
1 05/02/2018 05:11PM
Last Post by Marco E. Ciriotti

Revisiting the crystal structure of dickite

by Marco E. Ciriotti
1 05/02/2018 05:01PM
Last Post by Marco E. Ciriotti

Structure of low-temperature polar (orthorhombic) phase of russellite (Bi2WO6)

by Uwe Kolitsch
1 05/02/2018 12:51PM
Last Post by Uwe Kolitsch

Molecular dynamics study of tridymite

by Marco E. Ciriotti
1 05/02/2018 09:06AM
Last Post by Marco E. Ciriotti
This topic has been moved.

Graves Mountain Specimens Attachments

by Matthew Hansen
  This topic has been moved.

IMA 2015-K = redefinition of thérèsemagnanite: new data and identity to the discredited “cobaltogordaite”

by Marco E. Ciriotti
1 04/18/2018 09:33AM
Last Post by Marco E. Ciriotti

The crystal structure of ceruleite from Cap Garonne, France

by Marco E. Ciriotti
1 04/18/2018 09:31AM
Last Post by Marco E. Ciriotti

Another step toward the solution of the real structure of zinkenite

by Marco E. Ciriotti
1 04/13/2018 12:45PM
Last Post by Marco E. Ciriotti

The incommensurately modulated crystal structure of roshchinite

by Marco E. Ciriotti
1 04/13/2018 12:44PM
Last Post by Marco E. Ciriotti

Stützite crystal structure determination

by Marco E. Ciriotti
1 04/13/2018 12:43PM
Last Post by Marco E. Ciriotti

Reexamination of the crystal structure of semseyite

by Marco E. Ciriotti
1 04/13/2018 12:41PM
Last Post by Marco E. Ciriotti

Hydro­cerussite-related minerals and materials: structural principles, chemical variations and infrared spectroscopy

by Uwe Kolitsch
4 04/12/2018 05:05AM
Last Post by Andrew G. Christy

Crystal structure and hydrogen bond system of melanterite

by Marco E. Ciriotti
5 04/06/2018 03:33AM
Last Post by Martin Rich

Crystal chemistry of agardite-(Ce) from the Clara mine

by Uwe Kolitsch
3 04/04/2018 11:36PM
Last Post by Stuart Mills

Redefinition of zircophyllite

by Marco E. Ciriotti
4 03/27/2018 02:08PM
Last Post by Reiner Mielke

Ericssonite group of Fe3+ disilicate minerals

by Marco E. Ciriotti
1 03/27/2018 07:42AM
Last Post by Marco E. Ciriotti
This topic has been moved.

Green Dematoid/Grossular Garnet. Tsavorite location based? Attachments

by Logan B.
  This topic has been moved.
This topic has been moved.

Anybody know if this beryl crystal is of good quality form Connecticut? Attachments

by Lucas Brown Lucas
  This topic has been moved.
This topic has been moved.

Calcite or celestite/angelite Attachments

by Sandra Conte
  This topic has been moved.
This topic has been moved.

Anybody remember what these are called? Attachments

by Ignacio Rios Jr.
  This topic has been moved.
This topic has been moved.

Unknown Crystal Cluster Attachments

by Krisha Willis
  This topic has been moved.
This topic has been moved.

Some rocks or minerals with human DNA and certain types which correspond to distinct body parts.

by Jeremy Marsh
  This topic has been moved.

Nomenclature of the gadolinite supergroup

by Marco E. Ciriotti
4 02/27/2018 07:52PM
Last Post by Fred E. Davis

Structural analysis of twins in feldspars. I. Carlsbad twinning

by Marco E. Ciriotti
1 02/25/2018 01:56PM
Last Post by Marco E. Ciriotti
This topic has been moved.

MORPHOLOGY OF MINERALS

by Gideon Gobti Ayeah
  This topic has been moved.
This topic has been moved.

minerals crystallizing in the tetrahedral habit

by john watson
  This topic has been moved.

Crystal structure of lueshite at 298 K resolved by high-resolution time-of-flight neutron powder diffraction

by Marco E. Ciriotti
1 02/07/2018 08:53AM
Last Post by Marco E. Ciriotti

Unnamed Ca3Y(PO4)3 and CaYP7O20

by Uwe Kolitsch
1 02/04/2018 07:38PM
Last Post by Uwe Kolitsch

Tourmaline crystal chemistry

by Marco E. Ciriotti
9 02/03/2018 03:18AM
Last Post by Doug Daniels
This topic has been moved.

Could these samples contain gold? Attachments

by Greg Hoff
  This topic has been moved.

Crystal structure of cesbronite: a novel sheet tellurate topology - formula revised

by Marco E. Ciriotti
3 02/02/2018 08:28AM
Last Post by Marco E. Ciriotti

Determination of hydrogen site and occupancy in hydrous Mg2SiO4 spinel by single-crystal neutron diffraction (OH-bearing ringwoodite)

by Marco E. Ciriotti
1 01/31/2018 09:02PM
Last Post by Marco E. Ciriotti

Crystal structure refinements of tetragonal (OH,F)-rich spessartine and henritermierite garnets

by Marco E. Ciriotti
1 01/31/2018 09:01PM
Last Post by Marco E. Ciriotti

Hydrogen bonding in goldichite: structure refinement

by Marco E. Ciriotti
1 01/31/2018 09:00PM
Last Post by Marco E. Ciriotti

The order–disorder potential of the crystal structure of monohydrocalcite

by Marco E. Ciriotti
1 01/31/2018 08:57PM
Last Post by Marco E. Ciriotti

Ferdowsiite from the Monte Arsiccio mine, Apuan Alps, Tuscany (Italy)

by Marco E. Ciriotti
1 01/31/2018 08:52PM
Last Post by Marco E. Ciriotti

New data on metacinnabar from Tuscany (Italy)

by Marco E. Ciriotti
1 01/31/2018 08:51PM
Last Post by Marco E. Ciriotti

Unnamed BiS

by Uwe Kolitsch
1 01/26/2018 11:55AM
Last Post by Uwe Kolitsch
This topic has been moved.

Rare Mineral? Karelianite titanian

by Mark Casto
  This topic has been moved.

A novel sheet topology in the structure of kamitugaite

by Marco E. Ciriotti
1 01/17/2018 06:20PM
Last Post by Marco E. Ciriotti

Second global occurrence of middlebackite near the Passo di San Lugano (Carano, Trento, Italy)

by Marco E. Ciriotti
1 01/15/2018 02:38PM
Last Post by Marco E. Ciriotti

The Mineral Stützite: a Zintl-Phase or Polar Intermetallic?

by Marco E. Ciriotti
4 01/09/2018 02:07PM
Last Post by Uwe Kolitsch

Ti- and Nb-rich osbornite from impactite in Scotland

by Uwe Kolitsch
3 01/02/2018 07:03PM
Last Post by Pavel Kartashov

Crystal structure of epifanovite

by Marco E. Ciriotti
1 12/26/2017 10:52AM
Last Post by Marco E. Ciriotti

Nickellotharmeyerite missing in Tsumcorite group

by Hartmut Hensel
2 12/19/2017 05:29PM
Last Post by Uwe Kolitsch

Revision of the crystal structure and chemical formula of zvyaginite

by Marco E. Ciriotti
1 12/18/2017 06:00PM
Last Post by Marco E. Ciriotti

Nomenclature and classification of the seidozerite-supergroup with some renamings

by Marco E. Ciriotti
1 12/18/2017 03:13PM
Last Post by Marco E. Ciriotti

Crystal structure determination of a ginorite specimen from Larderello type-locality

by Marco E. Ciriotti
1 12/17/2017 10:45AM
Last Post by Marco E. Ciriotti

Vesuvianite from the Somma-Vesuvius Complex: New Data and Revised Formula

by Marco E. Ciriotti
1 12/16/2017 11:52AM
Last Post by Marco E. Ciriotti

Alteration of steenstrupine-(Ce) from the Ilímaussaq alkaline complex, South Greenland

by Marco E. Ciriotti
1 12/13/2017 08:40AM
Last Post by Marco E. Ciriotti

Denisovite structure

by Marco E. Ciriotti
1 12/12/2017 10:59AM
Last Post by Marco E. Ciriotti

On the crystal-chemistry of rosasite and parádsasvárite

by Marco E. Ciriotti
2 12/11/2017 10:26AM
Last Post by Uwe Kolitsch

Nanocrystalline structure of "basaluminite", an aluminum hydroxide sulfate from acid mine drainage

by Marco E. Ciriotti
2 12/07/2017 02:56PM
Last Post by Uwe Kolitsch

Whole‐nanoparticle atomistic modeling of the schwertmannite structure from total scattering data

by Marco E. Ciriotti
2 12/06/2017 02:58PM
Last Post by Uwe Kolitsch

Crystal structure of vanuralite

by Marco E. Ciriotti
1 11/29/2017 12:21PM
Last Post by Marco E. Ciriotti

Magnesio-riebeckite from the Varenche mine (Aosta Valley, Italy): crystal-chemical characterization of a grandfathered end-member

by Marco E. Ciriotti
2 11/22/2017 06:32PM
Last Post by Uwe Kolitsch

Structural, chemical and spectroscopic re-examination of type uklonskovite leads to its redefinition

by Marco E. Ciriotti
1 11/22/2017 05:23PM
Last Post by Marco E. Ciriotti

Crystal-structure refinement and high-temperature X-ray diffraction study of batisite

by Marco E. Ciriotti
1 11/20/2017 09:57AM
Last Post by Marco E. Ciriotti

Crystal structure of loparite: a new acentric variety

by Marco E. Ciriotti
1 11/20/2017 09:56AM
Last Post by Marco E. Ciriotti

The type locality of barringerite

by Jolyon & Katya Ralph
7 11/12/2017 03:10PM
Last Post by Kevin Conroy

Fake localities

by Jolyon & Katya Ralph
3 11/12/2017 01:29PM
Last Post by Alfredo Petrov

Crystal-chemical aspects of the roméite group

by Marco E. Ciriotti
1 10/31/2017 10:53AM
Last Post by Marco E. Ciriotti
This topic has been moved.

Please help ID this pressumed sulphide. Attachments

by mark gallimore
  This topic has been moved.
This topic has been moved.

Is this gwindel quartz? Attachments

by Rien Hartman
  This topic has been moved.

New data on hemihedrite from Arizona

by Marco E. Ciriotti
1 10/27/2017 09:38AM
Last Post by Marco E. Ciriotti

Refinement of the crystal structure of sieleckiite and revision of its symmetry

by Marco E. Ciriotti
1 10/27/2017 09:37AM
Last Post by Marco E. Ciriotti

Commensurately modulated structure of parabutlerite

by Marco E. Ciriotti
1 10/19/2017 08:31AM
Last Post by Marco E. Ciriotti

Crystal structure determination of karibibite

by Marco E. Ciriotti
2 10/18/2017 10:49AM
Last Post by Uwe Kolitsch

IMA 2016-G = girdite discreditation

by Marco E. Ciriotti
2 10/18/2017 10:44AM
Last Post by Uwe Kolitsch

Cancrinite-vishnevite solid solution from Cinder Lake (Manitoba, Canada)

by Marco E. Ciriotti
2 10/16/2017 09:08PM
Last Post by Rob Woodside
This topic has been moved.

what to do about 'vulcanite' Attachments

by Dona Leicht
  This topic has been moved.

Crystal structure of the OH-dominant gadolinite-(Y) analogue

by Marco E. Ciriotti
1 10/03/2017 02:21PM
Last Post by Marco E. Ciriotti

A commensurately modulated structure of parabutlerite

by Marco E. Ciriotti
1 10/03/2017 02:19PM
Last Post by Marco E. Ciriotti

Multidimensional structural variation in the cyano­trichite family of merotypes: camérolaite-3b-F-1

by Marco E. Ciriotti
1 10/03/2017 02:16PM
Last Post by Marco E. Ciriotti

Unnamed Au1.5Pb and AuPb

by Uwe Kolitsch
4 09/30/2017 07:13PM
Last Post by Uwe Kolitsch



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