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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

Tausonite

by Kraka Doros
2 08/19/2018 05:45PM
Last Post by Pavel Kartashov

The crystal structures of Pb5Sb4S11 (Boulangerite) – a phase transition explains seemingly contradictory structure models

by Uwe Kolitsch
1 08/18/2018 08:52PM
Last Post by Uwe Kolitsch

Structure of nollmotzite, the first natural uranium-oxide containing fluorine

by Marco E. Ciriotti
3 08/10/2018 11:22AM
Last Post by Marco E. Ciriotti
This topic has been moved.

Chert or something else?

by Norman King
  This topic has been moved.

Dynamic disorder of Fe3+ ions in the crystal structure of natural barioferrite

by Marco E. Ciriotti
1 08/08/2018 10:45AM
Last Post by Marco E. Ciriotti

Crystal structure of titanium-rich eudialyte from the Kovdor Alkaline Massif

by Marco E. Ciriotti
1 08/08/2018 10:43AM
Last Post by Marco E. Ciriotti

Jinshajiangite: structure, twinning and pseudo­symmetry

by Marco E. Ciriotti
1 08/03/2018 02:39PM
Last Post by Marco E. Ciriotti

Kurchatovite and clinokurchatovite: Example of modular polymorphism

by Marco E. Ciriotti
1 08/03/2018 10:06AM
Last Post by Marco E. Ciriotti
This topic has been moved.

Brochantite from Zambia Attachments

by Hans-Jürgen Haas
  This topic has been moved.

Calciobritholite

by Reiner Mielke
12 07/28/2018 10:02AM
Last Post by Johan Kjellman

Crystal structure of hanksite

by Marco E. Ciriotti
1 07/26/2018 09:03AM
Last Post by Marco E. Ciriotti

Re-investigation of shkatulkalite

by Marco E. Ciriotti
1 07/18/2018 05:41PM
Last Post by Marco E. Ciriotti

Vanadium-bearing Oxide Minerals of the Green Giant Vanadium-graphite Deposit, Southwest Madagascar

by Marco E. Ciriotti
1 07/17/2018 06:03PM
Last Post by Marco E. Ciriotti

Edgarite: solution of the crystal structure

by Marco E. Ciriotti
1 07/17/2018 06:01PM
Last Post by Marco E. Ciriotti

The location of Mn (MnO: 2.0 wt%) in fluorapatite from Lavra da Golconda, Brazil

by Marco E. Ciriotti
4 07/09/2018 03:56PM
Last Post by Luís Martins

Crystal structure refinement and chemical formula of prosopite

by Marco E. Ciriotti
2 07/08/2018 03:50PM
Last Post by Uwe Kolitsch

Crystal structures and evolution of structural complexity of quintinite polytypes from the Kovdor alkaline massif

by Marco E. Ciriotti
1 07/04/2018 10:00AM
Last Post by Marco E. Ciriotti

Rare-earth crystal chemistry of thalénite-(Y) from different environments

by Marco E. Ciriotti
1 07/04/2018 09:58AM
Last Post by Marco E. Ciriotti

Zeolitic water in strunzite-group minerals

by Marco E. Ciriotti
1 07/04/2018 09:57AM
Last Post by Marco E. Ciriotti

Embreyite: structure determination, chemical formula

by Marco E. Ciriotti
1 07/04/2018 09:57AM
Last Post by Marco E. Ciriotti
This topic has been moved.

Locality of this 'candle' quartz Attachments

by Anthony Scoffler
  This topic has been moved.

Mertieite-II, Pd8Sb2.5As0.5, crystal structure refinement and formula revision

by Marco E. Ciriotti
1 06/19/2018 11:01AM
Last Post by Marco E. Ciriotti

Britholite Oka Quebec

by Richard Gunter
25 06/18/2018 03:23PM
Last Post by W. Richard Gunter
This topic has been moved.

I made natrolite on accident?!?!?! Attachments

by Nbj1987
  This topic has been moved.

Lonsdaleite

by Reiner Mielke
2 06/06/2018 04:32PM
Last Post by David Von Bargen

Article: Confusion over the description of the quartz structure yet again

by Uwe Kolitsch
1 06/06/2018 11:45AM
Last Post by Uwe Kolitsch

IMA 2016-G = girdite discreditation

by Marco E. Ciriotti
4 06/06/2018 11:06AM
Last Post by Uwe Kolitsch
This topic has been moved.

What's inside this agate slice? Attachments

by Eugene
  This topic has been moved.

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

by Uwe Kolitsch
2 06/04/2018 08:47PM
Last Post by Marco E. Ciriotti

Structure of russellite: Origin of ferroelectricity and the effect of stereoactive lone electron pair on the structure

by Marco E. Ciriotti
2 06/04/2018 02:58PM
Last Post by Uwe Kolitsch
This topic has been moved.

Fluorite location ID Attachments

by Joy Horn
  This topic has been moved.
This topic has been moved.

Help identify some rocks Attachments

by Kayla Marie
  This topic has been moved.
This topic has been moved.

Identification of Indian zeolites

by Becky Coulson
  This topic has been moved.

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

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



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