IMPORTANT MESSAGE. We need your support now to keep mindat.org running. Click here to find out why.
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for Educators
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch 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 ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Coombsite

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

Watsons Beach, Clutha District, Otago Region, South Island, New Zealand
Coombsite, etc.

Conselheiro Lafaiete, Minas Gerais, Brazil
Coombsite

Watsons Beach, Clutha District, Otago Region, South Island, New Zealand
Coombsite, etc.

Watsons Beach, Clutha District, Otago Region, South Island, New Zealand
Coombsite, etc.

Conselheiro Lafaiete, Minas Gerais, Brazil
Coombsite

Watsons Beach, Clutha District, Otago Region, South Island, New Zealand
Coombsite, etc.

Watsons Beach, Clutha District, Otago Region, South Island, New Zealand
Coombsite, etc.

Conselheiro Lafaiete, Minas Gerais, Brazil
Hide all sections | Show all sections

About CoombsiteHide

Formula:
K(Mn,Fe,Mg)13(Si,Al)18O42(OH)14
Colour:
Pale brownish yellow
Crystal System:
Trigonal
Name:
Named in 1991 by Teruhiko Sameshima and Yosuke Kawachi in honor of Douglas S. Coombs, professor of geology at the University of Otago, New Zealand. Coombs first described progressive mineralogical changes, especially relating to zeolites, due to low grade burial metamorphism. Coombs named wairakite, ferroceladonite, and ferroaluminoceladonite.
Isostructural with:
Zussmanite
Mn-analogue of zussmanite.


Classification of CoombsiteHide

IMA status:
Approved
Strunz 8th ed.:
8/H.40-20
Nickel-Strunz 10th (pending) ed.:
9.EG.35

9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings
Hey's CIM Ref.:
16.16.18

16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn

Physical Properties of CoombsiteHide

Colour:
Pale brownish yellow

Optical Data of CoombsiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.619 nε = 1.600
Max Birefringence:
δ = 0.019
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of CoombsiteHide

Formula:
K(Mn,Fe,Mg)13(Si,Al)18O42(OH)14
IMA Formula:
KMn2+13(Si,Al)18O42(OH)14
Elements listed:
H, K, Mn, O, Si - search for minerals with similar chemistry
Common Impurities:
Ti,Ca,Na

Crystallography of CoombsiteHide

Crystal System:
Trigonal
Cell Parameters:
a = 11.82 Å, c = 29.14 Å
Ratio:
a:c = 1 : 2.465
Unit Cell V:
3,525.78 ų (Calculated from Unit Cell)

Type Occurrence of CoombsiteHide

Type Locality:
ⓘ Watsons Beach, Clutha District, Otago Region, South Island, New Zealand
General Appearance of Type Material:
Aggregates of fibro-lamellar crystals up
to 20 micron in length, and often shows semispherulitic texture.
Geological Setting of Type Material:
A 50 cm thick rhodonite-quartz lens.
Associated Minerals at Type Locality:
RhodoniteQuartzParsettensiteCaryopilite

Synonyms of CoombsiteHide

Other Language Names for CoombsiteHide

German:Coombsit
Spanish:Coombsita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Rhodonite2 photos of Coombsite associated with Rhodonite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.EG.05CymriteBaAl2Si2(O,OH)8 · H2OMon.
9.EG.10Naujakasite(Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26Mon. 2/m : B2/m
9.EG.10ManganonaujakasiteNa6(Mn2+,Fe2+)Al4Si8O26Mon.
9.EG.15DmisteinbergiteCa(Al2Si2O8)Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
9.EG.20KampfiteBa12(Si11Al5)O31(CO3)8Cl5Mon. m
9.EG.25SträtlingiteCa2Al2SiO7 · 8H2OTrig.
9.EG.25VertumniteCa4Al4Si4O6(OH)24 · 3H2OMon. 2/m : P21/m
9.EG.30Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2OMon.
9.EG.30Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2OMon.
9.EG.30Tamaite(Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112 · 21H2OMon.
9.EG.35ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14Trig. 3 : R3
9.EG.40Franklinphilite(K,Na)4(Mn2+,Mg,Zn)48(Si,Al)72(O,OH)216 · 6H2OTric.
9.EG.40LennilenapeiteK6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 · 16H2OTric.
9.EG.40Parsettensite(K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2OMon. 2/m : B2/m
9.EG.40Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2OTric. 1 : P1
9.EG.45Latiumite(Ca,K)4(Si,Al)5O11(SO4,CO3)Mon.
9.EG.45Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2OMon.
9.EG.50JagoitePb18Fe3+4[Si4(Si,Fe3+)6][Pb4Si16(Si,Fe)4]O82Cl6Hex.
9.EG.55WickenburgiteCaPb3Al2Si10O24(OH)6Trig. 3m : P3 1c
9.EG.60HyttsjöitePb18Ba2Ca5Mn2+2Fe3+2Si30O90Cl · 6H2OTrig.
9.EG.65ArmbrusteriteK5Na7Mn15[(Si9O22)4](OH)10 · 4H2OMon. 2/m : B2/m
9.EG.70Britvinite[Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)]Tric. 1 : P1
9.EG.75Bannisterite(Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2OMon. 2/m : B2/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.16.1KanonaiteMn3+Al(SiO4)OOrth. mmm (2/m 2/m 2/m) : Pnnm
16.16.2SpessartineMn2+3Al2(SiO4)3Iso. m3m (4/m 3 2/m) : Ia3d
16.16.3DavreuxiteMnAl6Si4O17(OH)2Mon.
16.16.4SursassiteMn2+2Al3(SiO4)(Si2O7)(OH)3Mon. 2/m : P21/m
16.16.5CarpholiteMn2+Al2(Si2O6)(OH)4Orth.
16.16.6KellyiteMn2+2Al(AlSiO5)(OH)4Hex.
16.16.7PennantiteMn2+5Al(AlSi3O10)(OH)8Tric.
16.16.8AkatoreiteMn2+9Al2Si8O24(OH)8Tric.
16.16.9Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2OMon.
16.16.10Mangano-ferri-eckermannite{Na}{Na2}{Mn2+4Fe3+}Si8O22(OH)2Mon.
16.16.11Masutomilite(K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2Mon.
16.16.13HowieiteNa(Fe,Mn)10(Fe,Al)2Si12O31(OH)13Tric.
16.16.14Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2OMon.
16.16.15Bannisterite(Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2OMon. 2/m : B2/b
16.16.16Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44Tric.
16.16.17ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14Trig. 3 : R3
16.16.19HenritermieriteCa3(Mn3+,Al)2(SiO4)2(OH)4Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
16.16.20MacfalliteCa2Mn3+3(SiO4)(Si2O7)(OH)3Mon.
16.16.21Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2Mon.
16.16.22Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
16.16.23OkhotskiteCa2(Mn,Mg)(Mn3+,Al,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2OMon.
16.16.24Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2OMon.
16.16.25Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)Mon.

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.

References for CoombsiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
New Minerals (1997), New Minerals 1990-1994.
Sameshima, T. and Kawachi, Y. (1991): Coombsite, manganese analogue of zussmanite, and associated Mn-silicates, parsettensite and caryopilite, from southeast Otago, New Zealand Journal of Geology and Geophysics: 34, 329-335.

Internet Links for CoombsiteHide

Localities for CoombsiteHide

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.
Brazil
 
  • Minas Gerais
Farber Minerals
New Zealand (TL)
 
  • South Island
    • Otago Region
      • Clutha District
Sameshima, T., Kawachi, Y. (1991) Coombsite, Mn analogue of zussmanite, and associated Mn-silicates, parsettensite and caryopilite, from southeast Otago, New Zealand. New Zealand Journal of Geology and Geophysics, 34:3, 329-335.
Romania
 
  • Suceava Co.
    • Suceava district
      • Iacobeni (Jakobeny; Jacobeny; Jakabfalva)
http://minerals-of-the-carpathians.eu
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 1993-2018, 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: October 22, 2018 21:42:14 Page generated: July 19, 2018 16:12:11
Go to top of page