Mindat Logo

Glaucochroite

Formula:
CaMn
2+
 
[SiO
 
4
]
System:OrthorhombicColour:Bluish-grey, pink, brown ...
Lustre:Vitreous, ResinousHardness:6


Olivine Group.

Massive material in franklinite-willemite-zincite ore with hardystonite and calcite.

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
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:Mn, O, Si
All elements listed in formula:Ca, Mn, O, Si
Common Impurities:Fe,Zn,Pb,Mg

Relationship of Glaucochroite to other Species

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
CaMg[SiO
 
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
2+
2
[(OH)
 
2
|Si
 
4
O
 
10
]
14.18.5Shafranovskite
(Na,K)
 
6
(Mn,Fe)
 
3
Si
 
9
O
 
24
·6H
 
2
O
14.18.6Abswurmbachite
CuMn
3+
6
O
 
8
(SiO
 
4
)
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,Mg)
 
5
Fe(Si
 
3
Fe)O
 
10
(OH)
 
8
14.18.11 Tirodite
14.18.12Manganhumite
(Mn
2+
 
,Mg)
 
7
[(OH)
 
2
|(SiO
 
4
)
 
3
]
14.18.13Bustamite
(Mn
2+
 
,Ca)[SiO
 
3
]
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
[O
 
8
|SiO
 
4
]
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
MnMn
 
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,Ca)
 
4
(Mn,Ti,Fe)
 
3
Si
 
8
O
 
16
(OH)
 
12
·5H
 
2
O
14.18.31Richterite
Na[CaNa][Mg
 
5
][(OH)
 
2
|Si
 
8
O
 
22
]
14.18.32Byelorussite-(Ce)
Ba
 
2
NaCe
 
2
MnTi
 
2
Si
 
8
O
 
26
(F,OH) · H
 
2
O
14.18.33Deerite
(Fe,Mn)
 
6
(Fe,Al)
 
3
Si
 
6
O
 
20
(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+
 
)[(O,OH)
 
3
|SiO
 
4
]

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.

Articles/Blogs about Glaucochroite

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
  • Search for Glaucochroite in the Natural History Museum (London) online catalogue
  • Glaucochroite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Search for Glaucochroite on minvision.com
  • Fine Minerals from Dan Weinrich Minerals
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Buy Minerals and Crystals from Crystalarium.com
  • Buy Fine Minerals from mineralsweb.com
  • Lapis Mineral Magazin
  • Buy from David K Joyce minerals
  • Find Glaucochroite on www.crystalclassics.co.uk
  • rare and unusual minerals mainly crystallized
  • Buy fine minerals and gemstones from Pala International
  • Search for - Glaucochroite - on e-Rocks Mineral Sales & Auctions
  • Rare and Unusual minerals at Mineralogical Research Company
  • Jobs:
  • Mining & Geology Jobs
  • Page Sponsor

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

    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.
    These maps work faster with Firefox!
    (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
    Kato, A. (1991) Bulletin of the National Science Museum (Tokyo), 17, 119-128.
    Namibia
     
    • Otjozondjupa Region
      • Grootfontein District
        • Kombat
    Mineralogical Record: 22: 421.
    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
    USA
     
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
    Palache (1935): 79; Dunn (1995): Pt3: 343.
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon & Ida Ralph 1993-2008. 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. If you would like to add information to improve the quality of our database, then click here to register.