Donate now to keep mindat.org alive!Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on Mindat
The most common minerals on earthMineral PhotographyThe Elements and their Minerals
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralSearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Glaucochroite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
CaMn2+SiO4
Colour:
Bluish-grey, pink, brown or white.
Lustre:
Vitreous, Resinous
Hardness:
6
Crystal System:
Orthorhombic
Member of:
Name:
Named in 1899 by Samuel L. Penfield and Charles H. Warren from the Greek γλαυκός for "sky-blue" and χρώσις "coloring", in allusion to its color.
Isostructural with:
Hide all sections | Show all sections

Classification of GlaucochroiteHide

Approved, 'Grandfathered' (first described prior to 1959)
First Published:
1975
9.AC.05

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

51 : NESOSILICATES Insular SiO4 Groups Only
3 : Insular SiO4 Groups Only with all cations in octahedral [6] coordination
14.18.14

14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe

Physical Properties of GlaucochroiteHide

Vitreous, Resinous
Transparency:
Opaque
Colour:
Bluish-grey, pink, brown or white.
Hardness:
Cleavage:
None Observed

Optical Data of GlaucochroiteHide

Type:
Biaxial (-)
RI values:
nα = 1.679 - 1.686 nβ = 1.716 - 1.723 nγ = 1.729 - 1.736
2V:
Measured: 61° , Calculated: 60°
Max Birefringence:
δ = 0.050
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
medium

Chemical Properties of GlaucochroiteHide

Formula:
CaMn2+SiO4
Common Impurities:
Fe,Zn,Pb,Mg

Crystallography of GlaucochroiteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 4.92 Å, b = 11.14 Å, c = 6.50 Å
Ratio:
a:b:c = 0.442 : 1 : 0.583
Unit Cell V:
356.26 ų (Calculated from Unit Cell)
Z:
4

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.54 (30)
4.23 (40)
3.91 (10)
3.69 (60)
3.25 (20)
2.96 (60)
2.81 (20)
2.69 (80)
2.63 (80)
2.56 (20)
2.44 (30)
2.25 (20)
2.19 (20)
2.03 (20)
1.95 (20)
1.85 (100)
1.79 (20)
1.77 (20)
1.75 (20)
1.72 (20)
1.71 (20)
1.62 (40)
1.61 (40)
1.58 (20)
1.52 (30)
1.43 (20)
1.42 (30)
1.23 (20)
1.19 (20)
1.14 (20)
1.13 (50)
1.11 (50)
1.06 (40)

Type Occurrence of GlaucochroiteHide

General Appearance of Type Material:
Massive material in franklinite-willemite-zincite ore with hardystonite and calcite.

Synonyms of GlaucochroiteHide

Other Language Names for GlaucochroiteHide

Relationship of Glaucochroite to other SpeciesHide

Member of:
Other Members of this group:
Calcio-olivineCa2SiO4Orth. mmm (2/m 2/m 2/m)
FayaliteFe2+2SiO4Orth.
ForsteriteMg2SiO4Orth. mmm (2/m 2/m 2/m)
KirschsteiniteCaFe2+SiO4Orth. mmm (2/m 2/m 2/m) : Pnma
LaihuniteFe2+Fe3+2(SiO4)2Mon.
Liebenbergite(Ni,Mg)2SiO4Orth.
MonticelliteCaMgSiO4Orth.
OlivineEquivalent to Fayalite-Forsterite Series; usually a more or less Fe-bearing forsterite.Orth.
Roepperite (of Brush)(Fe2+2,Mn,Zn)SiO4
TephroiteMn2+2SiO4Orth. mmm (2/m 2/m 2/m)

Common AssociatesHide

Associated Minerals Based on Photo Data:
Willemite13 photos of Glaucochroite associated with Willemite on mindat.org.
Franklinite6 photos of Glaucochroite associated with Franklinite on mindat.org.
Zincite5 photos of Glaucochroite associated with Zincite on mindat.org.
Esperite3 photos of Glaucochroite associated with Esperite on mindat.org.
Hardystonite3 photos of Glaucochroite associated with Hardystonite on mindat.org.
Clinohedrite3 photos of Glaucochroite associated with Clinohedrite on mindat.org.
Leucophoenicite2 photos of Glaucochroite associated with Leucophoenicite on mindat.org.
Calcite2 photos of Glaucochroite associated with Calcite on mindat.org.
Chalcophanite1 photo of Glaucochroite associated with Chalcophanite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.AC.AhrensiteFe2SiO4Iso. m3m (4/m 3 2/m)
9.AC.05FayaliteFe2+2SiO4Orth.
9.AC.05ForsteriteMg2SiO4Orth. mmm (2/m 2/m 2/m)
9.AC.05KirschsteiniteCaFe2+SiO4Orth. mmm (2/m 2/m 2/m) : Pnma
9.AC.05LaihuniteFe2+Fe3+2(SiO4)2Mon.
9.AC.05Liebenbergite(Ni,Mg)2SiO4Orth.
9.AC.05TephroiteMn2+2SiO4Orth. mmm (2/m 2/m 2/m)
9.AC.10MonticelliteCaMgSiO4Orth.
9.AC.15BrunogeieriteFe2+2Ge4+O4Iso. m3m (4/m 3 2/m) : Fd3m
9.AC.15Ringwoodite(Mg,Fe2+)2SiO4Iso. m3m (4/m 3 2/m) : Ia3d
9.AC.20ChesnokoviteNa2[SiO2(OH)2] · 8H2OOrth. mmm (2/m 2/m 2/m) : Ibca

Related Minerals - Dana Grouping (8th Ed.)Hide

51.3.2.1MonticelliteCaMgSiO4Orth.
51.3.2.2KirschsteiniteCaFe2+SiO4Orth. mmm (2/m 2/m 2/m) : Pnma

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.18.1Nambulite(Li,Na)Mn4Si5O14(OH)Tric.
14.18.2Natronambulite(Na,Li)(Mn,Ca)4Si5O14OHTric.
14.18.3ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2OTrig.
14.18.4NorrishiteKLiMn3+2(Si4O10)O2Mon. 2/m : B2/m
14.18.5Shafranovskite(Na,K)6(Mn,Fe)3Si9O24 · 6H2OTrig.
14.18.6AbswurmbachiteCuMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
14.18.7Donpeacorite(Mn2+,Mg)Mg[SiO3]2Orth.
14.18.8KanoiteMn2+(Mg,Mn2+)Si2O6Mon. 2/m : P21/b
14.18.9CaryopiliteMn2+3Si2O5(OH)4Mon.
14.18.10Gonyerite(Mn2+,Mg)5Fe3+(Fe3+Si3O10)(OH)8
14.18.11Tirodite
14.18.12Manganhumite(Mn2+,Mg)7(SiO4)3(OH)2Orth.
14.18.13BustamiteCaMn2+(Si2O6)Tric. 1 : P1
14.18.15Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2OTrig.
14.18.16SantaclaraiteCaMn4[Si5O14OH](OH) · H2OTric.
14.18.17FerrobustamiteCaFe2+(Si2O6)Tric.
14.18.18JohannseniteCaMn2+Si2O6Mon. 2/m : B2/b
14.18.19NeltneriteCaMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
14.18.20OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2OHex.
14.18.21InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2OTric. 1 : P1
14.18.22OrientiteCa8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O Orth.
14.18.23RuiziteCa2Mn3+2[Si4O11(OH)2](OH)2·2H2OMon. 2
14.18.24BostwickiteCaMn6Si3O16 · 7H2OOrth.
14.18.25KittatinnyiteCa2Mn2Mn(SiO4)2(OH)4 · 9H2OHex.
14.18.26LithiomarsturiteLiCa2Mn2Si5O14(OH)Tric.
14.18.27SeranditeNaMn2+2Si3O8(OH)Tric. 1 : P1
14.18.28KvanefjelditeNa4(Ca,Mn)(Si3O7)2(OH)2Orth.
14.18.29MarsturiteNaCaMn3Si5O14(OH)Tric. 1 : P1
14.18.30RaiteNa4Mn2+3Ti0.25Si8O20(OH)2 · 10H2OOrth. 2 2 2 : C2 2 2
14.18.31Richterite{Na}{NaCa}{Mg5}(Si8O22)(OH)2Mon.
14.18.32Byelorussite-(Ce)NaBa2Ce2MnTi2[Si4O12]2O2(F,OH) · H2O
14.18.33Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5Mon.
14.18.34Calderite(Mn2+,Ca)3(Fe3+,Al)2(SiO4)3Iso.
14.18.35PyroxmangiteMnSiO3Tric. 1
14.18.36Dannemorite☐{Mn2+2}{Fe2+5}(Si8O22)(OH)2
14.18.37Neotocite(Mn,Fe,Mg)SiO3 · H2OAmor.
14.18.38BabingtoniteCa2(Fe,Mn)FeSi5O14(OH)Tric. 1 : P1
14.18.39ManganbabingtoniteCa2(Mn,Fe)FeSi5O14(OH)Tric.
14.18.40ÖrebroiteMn2+3(Sb5+,Fe3+)(SiO4)(O,OH)3Hex.

Fluorescence of GlaucochroiteHide

Other InformationHide

Health Risks:
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.

Glaucochroite in petrologyHide

Common component of (items highlighted in red)

References for GlaucochroiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1978): 63: 930.
American Mineralogist (1987): 72: 423.
Science (1984): 223: 1075.

Internet Links for GlaucochroiteHide

Localities for GlaucochroiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
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
    • Murmanskaya Oblast'
www.koeln.netsurf.de/~w.steffens/khib.htm
Chukanov, N. V. (2014), Infrared spectra of mineral species: Extended library. Springer Geochemistry / Mineralogy. 1726 pp.
South Africa
 
  • Northern Cape Province
    • Kalahari manganese field
      • Hotazel
Von Bezing, K. L. et al. (1991) The Kalahari manganese field: An Update, Mineralogical Record 22(4) 279-302;
Sweden
 
  • Värmland
    • Filipstad
      • Nordmark district
        • Jakobsberg ore field
USA (TL)
 
  • New Jersey
    • Sussex Co.
      • Franklin Mining District
        • Franklin
Palache (1935): 79; Dunn (1995): Pt3: 343.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2017, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: November 18, 2017 23:03:02 Page generated: October 26, 2017 22:14:52
Go to top of page