Mindat Logo
Home Page Log In Messageboard The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Edgrewite

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



Formula:
Ca
 
9
(SiO
 
4
)
 
4
F
 
2
System:Monoclinic
Member of:Humite Group
Name:
Named for the mineralogist Edward S. Grew, University of Maine.
This page provides mineralogical data about Edgrewite.

Classification of Edgrewite

IMA status:Approved 2011
mindat.org URL:http://www.mindat.org/min-42491.html
Please feel free to link to this page.

Type Occurrence of Edgrewite

Type Locality:Lakargi Mt., Verkhnechegemskaya caldera (Verkhni Chegem caldera; Upper Chegem caldera), Kabardino-Balkarian Republic, Northern Caucasus Region, Russia
Place of Conservation of Type Material:Type material is deposited in the collections of the Museum of Natural History, Bern, Switzerland, catalogue number NMBE 41086.

Crystallography of Edgrewite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b {P1 1 21/b} {P21/c} {P1 21/c 1} {P21/a}
Cell Parameters:a = 5.0687(1) Å, b = 11.3579(1) Å, c = 15.4004(2) Å
α = 100.598(1)°
Ratio:a:b:c = 0.446 : 1 : 1.356
Unit Cell Volume:V 0.00 ų (Calculated from Unit Cell)
Comment:Non-standard space-group setting P21/b.
X-Ray Powder Diffraction:
d-spacingIntensity
3.542 (51)
3.029 (100)
2.863 (42)
2.823 (79)
2.765 (64)
2.657 (44)
2.625 (55)
1.907 (59)

Chemical Properties of Edgrewite

Formula:
Ca
 
9
(SiO
 
4
)
 
4
F
 
2
Essential elements:Ca, F, O, Si
All elements listed in formula:Ca, F, O, Si

Relationship of Edgrewite to other Species

Member of:Humite Group
Other Members of Group:

- +
Alleghanyite
Mn
2+
5
(SiO
 
4
)
 
2
(OH)
 
2
Chegemite
Ca
 
7
(SiO
 
4
)
 
3
(OH)
 
2
Chondrodite
(Mg,Fe
2+
 
)
 
5
(SiO
 
4
)
 
2
(F,OH)
 
2
Clinohumite
(Mg,Fe
2+
 
)
 
9
(SiO
 
4
)
 
4
(F,OH)
 
2
Humite
(Mg,Fe
2+
 
)
 
7
(SiO
 
4
)
 
3
(F,OH)
 
2
Hydroxylchondrodite
Mg
 
5
(SiO
 
4
)
 
2
(OH)
 
2
Hydroxylclinohumite
Mg
 
9
(SiO
 
4
)
 
4
(OH,F)
 
2
Jerrygibbsite
Mn
2+
9
(SiO
 
4
)
 
4
(OH)
 
2
Kumtyubeite
Ca
 
5
(SiO
 
4
)
 
2
F
 
2
Leucophoenicite
Mn
2+
7
(SiO
 
4
)
 
3
(OH)
 
2
Manganhumite
(Mn
2+
 
,Mg)
 
7
(SiO
 
4
)
 
3
(OH)
 
2
Norbergite
Mg
 
3
(SiO
 
4
)(F,OH)
 
2
Reinhardbraunsite
Ca
 
5
(SiO
 
4
)
 
2
(OH,F)
 
2
Ribbeite
(Mn
2+
 
,Mg)
 
5
(SiO
 
4
)
 
2
(OH)
 
2
Sonolite
Mn
2+
9
(SiO
 
4
)
 
4
(OH,F)
 
2
Unnamed (Ca-analogue of Humite)
Ca
 
7
(SiO
 
4
)
 
4
F
 
2
Unnamed (F-analogue of Chegemite)
Ca
 
7
(SiO
 
4
)
 
3
(F,OH)
 
2

Other Names for Edgrewite

Synonyms:
IMA2011-058
Other Languages:

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Edgrewite

Reference List:

- +
Galuskin, E.V., Armbruster, T., Pertsev, N.N., Galuskina, I.O., Lazic, B., Gazeev, V.M., Włodyka, R., Dulski, M., Dzierzanowski, P., Zadov, A.E. and Dubrovinsky, L. (2011) Edgrewite, IMA 2011-058. CNMNC Newsletter No. 11, December 2011, page 2888; Mineralogical Magazine, 75, 2887-2893.

Internet Links for Edgrewite

Search Engines:
  • Look for Edgrewite on Google
  • Look for Edgrewite images on Google
    • External Links:
  • Look for Edgrewite on Webmineral
  • Look for Edgrewite on Athena Mineralogy
  • Look for Edgrewite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
    • Mineral Dealers:
  • Buy from David K Joyce minerals
  • Fine Minerals from Weinrich Minerals, Inc.
  • Find Edgrewite on www.crystalclassics.co.uk
  • Fine and rare minerals from mintreasure.com
  • Top quality minerals from Kristalle of California
  • Fabre Minerals - search for Edgrewite specimens
  • Buy RARE Minerals from Rocks of Africa
  • Rare and Unusual minerals at Mineralogical Research Company
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • rare and unusual minerals mainly crystallized
  • Search for Edgrewite on Well-Arranged Molecules
  • Minerals from Darwin Natural History
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Edgrewite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Russia
     
    • Northern Caucasus Region
      • Kabardino-Balkarian Republic
        • Verkhnechegemskaya caldera (Verkhni Chegem caldera; Upper Chegem caldera)
    		Galuskin, E.V., Armbruster, T., Pertsev, N.N., Galuskina, I.O., Lazic, B., Gazeev, V.M., Włodyka, R., Dulski, M., Dzierzanowski, P., Zadov, A.E. and Dubrovinsky, L. (2011) Edgrewite, IMA 2011-058. CNMNC Newsletter No. 11, December 2011, page 2888; Mineralogical Magazine, 75, 2887-2893.; Galuskin, E.V. et al (2011) Mineralogical Magazine, 75, 2888
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: 21st Dec 2012 19:39:23
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds