Colomeraite
A valid IMA mineral species
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Formula:
NaTi3+Si2O6
Crystal System:
Monoclinic
Member of:
Name:
after the parent meteorite
Type Locality:
The NaSi analogue of grossmanite. The Ti3+-analogue of aegirine, jadeite, jervisite, kosmochlor, namansilite, and natalyite.
Known synthetic analogue.
Known synthetic analogue.
Unique Identifiers
Mindat ID:
55612
Long-form identifier:
mindat:1:1:55612:5
GUID
(UUID V4):
(UUID V4):
c41157c9-4292-46b9-b7ba-b8d8c573274e
IMA Classification of Colomeraite
Approved
Approval history:
IMA No. 2021-061
Classification of Colomeraite
9.DA.
9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Colo | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Chemistry of Colomeraite
Mindat Formula:
NaTi3+Si2O6
Elements listed:
Chemical Analysis
Oxide wt%:
1 | |
---|---|
SiO2 | 54.82 % |
Ti2O3 | 17.15 % |
TiO2 | 5.58 % |
Na2O | 12.33 % |
MgO | 3.95 % |
FeO | 3.58 % |
CaO | 1.98 % |
MnO | 0.28 % |
Al2O3 | 0.24 % |
Cr2O3 | 0.13 % |
K2O | 0.02 % |
Total | 100.05 % |
Total: | 200.11 % |
Empirical formulas:
Sample ID | Empirical Formula |
---|---|
1 | (Na0.88Ca0.08Mg0.04)(Ti3+0.53Ti4+0.15Mg0.17Fe0.11Mn0.01Al0.01)Si2.01O6 |
Sample references:
ID | Locality | Reference | Notes |
---|---|---|---|
1 | Colomera meteorite, Colomera, Granada, Andalusia, Spain | by EPMA-WDS; empirical formula basis: 6 O apfu, Ti partitioning based on stoichiometry; ideal formula requires Na2O 13.89, Ti2O3 32.23, SiO2 53.87 wt.% |
Crystallography of Colomeraite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 9.70(1) Å, b = 8.88(1) Å, c = 5.30(1) Å
β = 106.8(1)°
β = 106.8(1)°
Ratio:
a:b:c = 1.092 : 1 : 0.597
Unit Cell V:
437 ų
Z:
4
Comment:
structure determined
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.996 Å | (100) |
2.923 Å | (43) |
2.562 Å | (21) |
2.537 Å | (40) |
2.496 Å | (37) |
1.637 Å | (20) |
1.619 Å | (19) |
1.408 Å | (22) |
Type Occurrence of Colomeraite
General Appearance of Type Material:
subhedral crystals, ~2-6 μm in size, closely associated with albite and K feldspar
Place of Conservation of Type Material:
mineralogical collections of the Smithsonian National Museum of Natural History, 10th St. & Constitution Ave. NW, Washington, DC 20560, USA, catalogue no. USNM 7928
Geological Setting of Type Material:
a single silicate nodule
Associated Minerals at Type Locality:
Synonyms of Colomeraite
Relationship of Colomeraite to other Species
Member of:
Other Members of this group:
Aegirine | NaFe3+Si2O6 | Mon. 2/m : B2/b |
Aegirine-augite | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 | Mon. 2/m : B2/b |
Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 | Mon. 2/m : B2/b |
Burnettite | CaVAlSiO6 | Mon. 2/m : B2/b |
Clinoenstatite | MgSiO3 | Mon. 2/m : P21/b |
Clinoferrosilite | Fe2+2Si2O6 | Mon. 2/m : P21/b |
Davisite | CaScAlSiO6 | Mon. 2/m : B2/b |
Diopside | CaMgSi2O6 | Mon. 2/m : B2/b |
Esseneite | CaFe3+[AlSiO6] | Mon. 2/m : B2/b |
Grossmanite | CaTi3+ AlSiO6 | Mon. 2/m : B2/b |
Hedenbergite | CaFe2+Si2O6 | Mon. 2/m : B2/b |
Jadeite | Na(Al,Fe3+)Si2O6 | Mon. 2/m : B2/b |
Jervisite | NaSc3+Si2O6 | Mon. 2/m : B2/b |
Johannsenite | CaMn2+Si2O6 | Mon. 2/m : B2/b |
Kanoite | Mn2+(Mg,Mn2+)Si2O6 | Mon. 2/m : P21/b |
Kosmochlor | NaCrSi2O6 | Mon. 2/m : B2/b |
Kushiroite | CaAl[AlSiO6] | Mon. 2/m : B2/b |
Namansilite | NaMn3+Si2O6 | Mon. 2/m : B2/b |
Natalyite | NaV3+Si2O6 | Mon. 2/m : B2/b |
Omphacite | (NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6 | Mon. 2/m |
Petedunnite | Ca(Zn,Mn2+,Mg,Fe2+)Si2O6 | Mon. 2/m : B2/b |
Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 | Mon. 2/m : P21/b |
Ryabchikovite | CuMgSi2O6 | Mon. 2/m : P21/b |
Spodumene | LiAlSi2O6 | Mon. 2/m : B2/b |
Tissintite | (Ca,Na,◻)AlSi2O6 | Mon. 2/m : B2/b |
UM2001-19-SiO:AlCaMgNa | (Na,Mg,Ca)(Mg,Al)Si2O6 | Mon. 2/m : B2/b |
UM2003-36-SiO:CaNa | NaCrSi2O6 - CaMgSi2O6 | Mon. 2/m : B2/b |
Related Minerals - Strunz-mindat Grouping
9.DA. | Protoenstatite | Mg2Si2O6 |
9.DA. | Ryabchikovite | CuMgSi2O6 |
9.DA.05 | Donpeacorite | (Mn,Mg)MgSi2O6 |
9.DA.05 | Enstatite | Mg2Si2O6 |
9.DA.05 | Ferrosilite | Fe2+2Si2O6 |
9.DA.10 | Clinoenstatite | MgSiO3 |
9.DA.10 | Clinoferrosilite | Fe2+2Si2O6 |
9.DA.10 | Kanoite | Mn2+(Mg,Mn2+)Si2O6 |
9.DA.10 | Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
9.DA.15 | Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
9.DA.15 | Diopside | CaMgSi2O6 |
9.DA.15 | Esseneite | CaFe3+[AlSiO6] |
9.DA.15 | Hedenbergite | CaFe2+Si2O6 |
9.DA.15 va | Jeffersonite | Ca(Mn,Zn,Fe)Si2O6 |
9.DA.15 | Johannsenite | CaMn2+Si2O6 |
9.DA.15 | Petedunnite | Ca(Zn,Mn2+,Mg,Fe2+)Si2O6 |
9.DA.15 | Davisite | CaScAlSiO6 |
9.DA.15 | Kushiroite | CaAl[AlSiO6] |
9.DA.15 | Grossmanite | CaTi3+ AlSiO6 |
9.DA.20 | Aegirine-augite | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 |
9.DA.20 | Omphacite | (NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6 |
9.DA.25 | Aegirine | NaFe3+Si2O6 |
9.DA.25 | Jadeite | Na(Al,Fe3+)Si2O6 |
9.DA.25 | Jervisite | NaSc3+Si2O6 |
9.DA.25 | Kosmochlor | NaCrSi2O6 |
9.DA.25 | Namansilite | NaMn3+Si2O6 |
9.DA.25 | Natalyite | NaV3+Si2O6 |
9.DA.25 | Tissintite | (Ca,Na,◻)AlSi2O6 |
9.DA.30 | Spodumene | LiAlSi2O6 |
9.DA.35 | Hiroseite | FeSiO3 |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Colomeraite
mindat.org URL:
https://www.mindat.org/min-55612.html
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References for Colomeraite
Reference List:
forum.amiminerals.it (n.d.) http://forum.amiminerals.it/viewtopic.php?f=5&t=18799&sid=50d6db361ecc540a05883c73ce2015fc
Localities for Colomeraite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Spain (TL) | |
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