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

Glaucochroite

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

Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
© 2007 Peter Cristofono

Show Glaucochroite Photos (7)



Formula:
CaMn
2+
 
SiO
 
4
System:OrthorhombicColour:Bluish-grey, pink, brown ...
Lustre:Vitreous, ResinousHardness:6
Member of:Olivine Group
Name:From the Greek γλαυκός for "sky-blue" and χρώσις "colouring", in allusion to its colour.


Olivine Group.


Classification of Glaucochroite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered" 1975
Strunz 8th edition ID:8/A.05-30
Nickel-Strunz 10th (pending) edition ID:9.AC.05

9 : SILICATES (Germanates)
A : Nesosilicates
C : Nesosilicates without additional anions; cations in octahedral [6] coordination
Dana 8th edition ID:51.3.2.3

51 : NESOSILICATES Insular SiO4 Groups Only
3 : Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Hey's CIM Ref.:14.18.14

14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
mindat.org URL:http://www.mindat.org/min-1708.html
Please feel free to link to this page.

Type Occurrence of Glaucochroite

Type Locality:Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
General Appearance of Type Material:Massive material in franklinite-willemite-zincite ore with hardystonite and calcite.
Year of Discovery:1899

Physical Properties of Glaucochroite

Lustre:Vitreous, Resinous
Diaphaneity (Transparency):Opaque
Colour:Bluish-grey, pink, brown or white.
Hardness (Mohs):6
Cleavage:None Observed

Crystallography of Glaucochroite

Crystal System:Orthorhombic
Cell Parameters:a = 4.92Å, b = 11.14Å, c = 6.5Å
Ratio:a:b:c = 0.442 : 1 : 0.583
Unit Cell Volume:V 356.26 ų (Calculated from Unit Cell)

Optical Data of Glaucochroite

Type:Biaxial (-)
RI values: nα = 1.679 - 1.686 nβ = 1.716 - 1.723 nγ = 1.729 - 1.736
2V:Measured: 61° , Calculated: 60°
Maximum Birefringence:δ = 0.050

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:medium

Chemical Properties of Glaucochroite

Formula:
CaMn
2+
 
SiO
 
4
Essential elements:Ca, Mn, O, Si
All elements listed in formula:Ca, Mn, O, Si
Common Impurities:Fe,Zn,Pb,Mg

Relationship of Glaucochroite to other Species

Member of:Olivine Group
Other Members of Group:

- +
Calcio-Olivine
Ca
 
2
SiO
 
4
Fayalite
Fe
2+
2
SiO
 
4
Forsterite
Mg
 
2
SiO
 
4
Kirschsteinite
CaFe
2+
 
SiO
 
4
Laihunite
Fe
2+
 
Fe
3+
2
(SiO
 
4
)
 
2
Liebenbergite
(Ni,Mg)
 
2
SiO
 
4
Monticellite
CaMgSiO
 
4
Olivine
(Mg,Fe
2+
 
)
 
2
SiO
 
4
Tephroite
Mn
2+
2
SiO
 
4
Related Minerals - Nickel-Strunz Grouping):

- +
9.AC.05Fayalite
Fe
2+
2
SiO
 
4
9.AC.05Forsterite
Mg
 
2
SiO
 
4
9.AC.05Kirschsteinite
CaFe
2+
 
SiO
 
4
9.AC.05Laihunite
Fe
2+
 
Fe
3+
2
(SiO
 
4
)
 
2
9.AC.05Liebenbergite
(Ni,Mg)
 
2
SiO
 
4
9.AC.05Tephroite
Mn
2+
2
SiO
 
4
9.AC.10Monticellite
CaMgSiO
 
4
9.AC.15Ringwoodite
(Mg,Fe
2+
 
)
 
2
SiO
 
4
9.AC.20Chesnokovite
Na
 
2
[SiO
 
2
(OH)
 
2
] · 8H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
14.18.1Nambulite
(Li,Na)Mn
 
4
Si
 
5
O
 
14
(OH)
14.18.2Natronambulite
(Na,Li)(Mn,Ca)
 
4
Si
 
5
O
 
14
OH
14.18.3Zakharovite
Na
 
4
Mn
 
5
Si
 
10
O
 
24
(OH)
 
6
 · 6H
 
2
O
14.18.4Norrishite
KLiMn
3+
2
(Si
 
4
O
 
10
)O
 
2
14.18.5Shafranovskite
(Na,K)
 
6
(Mn,Fe)
 
3
Si
 
9
O
 
24
 · 6H
 
2
O
14.18.6Abswurmbachite
CuMn
3+
6
(SiO
 
4
)O
 
8
14.18.7Donpeacorite
(Mn
2+
 
,Mg)Mg[SiO
 
3
]
 
2
14.18.8Kanoite
Mn
2+
 
(Mg,Mn
2+
 
)Si
 
2
O
 
6
14.18.9Caryopilite
(Mn,Mg)
 
3
(Si
 
2
O
 
5
)(OH)
 
4
14.18.10Gonyerite
(Mn
2+
 
,Mg)
 
5
Fe
3+
 
(Fe
3+
 
Si
 
3
O
 
10
)(OH)
 
8
14.18.11Tirodite
14.18.12Manganhumite
(Mn
2+
 
,Mg)
 
7
(SiO
 
4
)
 
3
(OH)
 
2
14.18.13Bustamite
CaMn
2+
 
(Si
 
2
O
 
6
)
14.18.15Truscottite
(Ca,Mn)
 
14
Si
 
24
O
 
58
(OH)
 
8
 · 2H
 
2
O
14.18.16Santaclaraite
CaMn
 
4
[Si
 
5
O
 
14
OH](OH) · H
 
2
O
14.18.17Ferrobustamite
Ca(Fe
2+
 
,Ca,Mn
2+
 
)(Si
 
2
O
 
6
)
14.18.18Johannsenite
CaMn
2+
 
Si
 
2
O
 
6
14.18.19Neltnerite
CaMn
3+
6
(SiO
 
4
)O
 
8
14.18.20Orlymanite
Ca
 
4
Mn
 
3
Si
 
8
O
 
20
(OH)
 
6
 · 2H
 
2
O
14.18.21Inesite
Ca
 
2
(Mn,Fe)
 
7
Si
 
10
O
 
28
(OH)
 
2
 · 5H
 
2
O
14.18.22Orientite
Ca
 
2
Mn
2+
 
Mn
3+
2
(Si
 
3
O
 
10
)(OH)
 
4
14.18.23Ruizite
Ca
 
2
Mn
3+
2
[(OH)
 
2
|H
 
2
Si
 
4
O
 
13
] · 2H
 
2
O
14.18.24Bostwickite
CaMn
 
6
Si
 
3
O
 
16
 · 7H
 
2
O
14.18.25Kittatinnyite
Ca
 
2
Mn
 
2
Mn(SiO
 
4
)
 
2
(OH)
 
4
 · 9H
 
2
O
14.18.26Lithiomarsturite
LiCa
 
2
Mn
 
2
Si
 
5
O
 
14
(OH)
14.18.27Sérandite
Na(Mn
2+
 
,Ca)
 
2
(HSi
 
3
O
 
9
)
14.18.28Kvanefjeldite
Na
 
4
(Ca,Mn)(Si
 
3
O
 
7
)
 
2
(OH)
 
2
14.18.29Marsturite
NaCaMn
 
3
Si
 
5
O
 
14
(OH)
14.18.30Raite
Na
 
4
Mn
2+
3
Ti
 
0.25
Si
 
8
O
 
20
(OH)
 
2
 · 10H
 
2
O
14.18.31Richterite
{Na}{CaNa}{Mg
 
5
}(Si
 
8
O
 
22
)(OH)
 
2
14.18.32Byelorussite-(Ce)
NaBa
 
2
Ce
 
2
MnTi
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
(F,OH) · H
 
2
O
14.18.33Deerite
(Fe,Mn)
 
6
(Fe,Al)
 
3
[Si
 
6
O
 
17
]O
 
3
(OH)
 
5
14.18.34Calderite
(Mn
2+
 
,Ca)
 
3
(Fe
3+
 
,Al)
 
2
(SiO
 
4
)
 
3
14.18.35Pyroxmangite
MnSiO
 
3
14.18.36Dannemorite
14.18.37Neotocite
(Mn,Fe,Mg)SiO
 
3
 · H
 
2
O
14.18.38Babingtonite
Ca
 
2
(Fe,Mn)FeSi
 
5
O
 
14
(OH)
14.18.39Manganbabingtonite
Ca
 
2
(Mn,Fe)FeSi
 
5
O
 
14
(OH)
14.18.40Örebroite
Mn
2+
3
(Fe
3+
 
,Sb
5+
 
)(SiO
 
4
)(O,OH)
 
3

Other Names for Glaucochroite

Synonyms:
CalcotephroiteGlauchchroite
Other Languages:
German:Calcotephroit
Glaucochroit
Glaukochroit
Russian:Глаукохроит
Spanish:Calcotephroita
Glaucochroita

Other Information

Fluorescence in UV light:None.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Industrial Uses:None.

References for Glaucochroite

Reference List:

- +
American Mineralogist (1978): 63: 930.

American Mineralogist (1987): 72: 423.

Science (1984): 223: 1075.

Internet Links for Glaucochroite

Search Engines:
  • Look for Glaucochroite on Google
  • Look for Glaucochroite images on Google
    • External Links:
  • Look for Glaucochroite on Webmineral
  • Look for Glaucochroite on Athena Mineralogy
  • Look for Glaucochroite on Wikipedia
  • Look for Glaucochroite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Glaucochroite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Buy fine minerals and gemstones from Pala International
  • The Arkenstone - Fine Minerals
  • Search for minerals at Heliodor
  • Find Glaucochroite on www.crystalclassics.co.uk
  • Fine and rare minerals from mintreasure.com
  • Fine Minerals from Weinrich Minerals, Inc.
  • Search for Glaucochroite on Well-Arranged Molecules
  • Fabre Minerals - search for Glaucochroite specimens
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • High-end worldwide specimens & outstanding customer service
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Search for - Glaucochroite - on e-Rocks Mineral Sales & Auctions
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Glaucochroite

    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.
    Japan
     
    • Honshu Island
      • Kanto Region
        • Tochigi Prefecture
          • Kanuma City
    		Kato, A. (1991) Bulletin of the National Science Museum (Tokyo), 17, 119-128.
    Namibia
     
    • Otjozondjupa Region
      • Grootfontein District
        • Kombat
    		Dunn, P.J. (1991), Rare minerals of the Kombat Mine, Mineralogical Record: 22(6): 421-425.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
    		www.koeln.netsurf.de/~w.steffens/khib.htm
    South Africa
     
    • Northern Cape Province
      • Kalahari manganese fields
        • Hotazel
    		[Von Bezing, K. L. et al. (1991) - The Kalahari manganese field : an update, Mineralogical Record, 22 (3), 279-302]
    Sweden
     
    • Värmland
      • Filipstad
        • Nordmark (Nordmarksberg)
    USA
     
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    		Palache (1935): 79; Dunn (1995): Pt3: 343.
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2013. 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: 8th May 2013 03:51:41
    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