Gjerdingenite-Fe
A valid IMA mineral species
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About Gjerdingenite-Fe
Formula:
K2Fe2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O
Colour:
pale yellow to orange yellow or brownish yellow
Lustre:
Vitreous, Waxy
Hardness:
5
Specific Gravity:
2.82
Crystal System:
Monoclinic
Member of:
Name:
For the type locality and the dominant Fe at a lattice position, according to the labuntsovite nomenclature.
Type Locality:
Unique Identifiers
Mindat ID:
11458
Long-form identifier:
mindat:1:1:11458:5
GUID
(UUID V4):
(UUID V4):
6ac644a1-e024-4289-9d4a-c9bbfb89cf3b
IMA Classification of Gjerdingenite-Fe
Approved
IMA Formula:
K2Fe(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O
Approval year:
2001
First published:
2002
Classification of Gjerdingenite-Fe
9.CE.30c
9 : SILICATES (Germanates)
C : Cyclosilicates
E : [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions
9 : SILICATES (Germanates)
C : Cyclosilicates
E : [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions
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 |
---|---|---|
Gje-Fe | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Gjerdingenite-Fe
Vitreous, Waxy
Transparency:
Translucent
Colour:
pale yellow to orange yellow or brownish yellow
Streak:
White to faintly yellow
Hardness:
5 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.82(2) g/cm3 (Measured) 2.830 g/cm3 (Calculated)
Optical Data of Gjerdingenite-Fe
Type:
Biaxial (+)
RI values:
nα = 1.668(2) nβ = 1.700(4) nγ = 1.794(1)
2V:
Measured: 58.5° , Calculated: 63.7°
Max Birefringence:
δ = 0.126
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Optical Extinction:
Y = b
Pleochroism:
Non-pleochroic
Chemistry of Gjerdingenite-Fe
Mindat Formula:
K2Fe2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O
Common Impurities:
Mn
Crystallography of Gjerdingenite-Fe
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 14.529(2) Å, b = 13.943(2) Å, c = 7.837(2) Å
β = 117.61°
β = 117.61°
Ratio:
a:b:c = 1.042 : 1 : 0.562
Unit Cell V:
1406.8 ų
Z:
2
Morphology:
Pinacoids {100}, {010}, {001}, {201}, prism {021}. The crystals are flattened on {001} and elongated along [010].
Twinning:
twinned according to the (001) plane
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0005798 | Gjerdingenite-Fe | Raade G, Ferraris G, Gula A, Ivaldi G (2002) Gjerdingenite-Fe from Norway, a new mineral species in the labuntsovite group: Description, crystal structure and twinning The Canadian Mineralogist 40 1629-1639 | 2002 | Norway | 0 | 293 |
CIF Raw Data - click here to close
Epitaxial Relationships of Gjerdingenite-Fe
Epitaxial Minerals:
Hydrokenoralstonite | Na0.5(Al,Mg)2(F,OH)6 · H2O |
Elpidite | Na2ZrSi6O15 · 3H2O |
Epitaxy Comments:
May form epitaxic overgrowth on elpidite; Coating of microcrystalline hydrokenoralstonite may occur.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.225 Å | (100) |
6.92 Å | (80) |
3.114 Å | (80) |
4.94 Å | (70) |
6.42 Å | (50) |
2.512 Å | (50) |
3.069 Å | (20) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Gjerdingenite-Fe
General Appearance of Type Material:
Prismatic to lath-shaped crystals up to 1 mm in length.
Place of Conservation of Type Material:
Geological Museum, University of Oslo, Norway (cat. nr 33712, 33713 and 33715).
Geological Setting of Type Material:
In miarolitic cavities in a permian sodic granite (ekerite).
Associated Minerals at Type Locality:
Reference:
Raade, G., Ferraris, G., Gula. A. & Ivaldi, G. (2002): Gjerdingenite-Fe from Norway, a new mineral species in the labuntsovite group: description, crystal structure and twinning. Canadian Mineralogist 40: 1629-1639
Synonyms of Gjerdingenite-Fe
Other Language Names for Gjerdingenite-Fe
Relationship of Gjerdingenite-Fe to other Species
Member of:
Other Members of this group:
Burovaite-Ca | (Na,K)4Ca2(Ti,Nb)8(Si4O12)4(OH,O)8 · 12H2O | Mon. 2/m : B2/m |
Gjerdingenite-Ca | K2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O | Mon. 2/m : B2/m |
Gjerdingenite-Mn | K2Mn2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O | Mon. 2/m : B2/m |
Gjerdingenite-Na | K2Na(Nb,Ti)4(Si4O12)2(OH,O)4 · 5H2O | Mon. 2/m : B2/m |
Karupmøllerite-Ca | (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 7H2O | Mon. 2/m : B2/m |
Kuzmenkoite-Mn | K2Mn2+(Ti,Nb)4(Si4O12)2(OH,O)4 · 5-6H2O | Mon. 2/m : B2/m |
Kuzmenkoite-Zn | K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4 · 6-8H2O | Mon. m : Bm |
Lepkhenelmite-Zn | (Ba,K)2Zn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2O | Mon. m : Bm |
Common Associates
Associated Minerals Based on Photo Data:
3 photos of Gjerdingenite-Fe associated with Kupletskite | (K,Na)3(Mn,Fe)7Ti2Si8O26(OH)4F |
2 photos of Gjerdingenite-Fe associated with Elpidite | Na2ZrSi6O15 · 3H2O |
2 photos of Gjerdingenite-Fe associated with Quartz | SiO2 |
1 photo of Gjerdingenite-Fe associated with Fluorite | CaF2 |
1 photo of Gjerdingenite-Fe associated with Brookite | TiO2 |
1 photo of Gjerdingenite-Fe associated with Gjerdingenite-Mn | K2Mn2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O |
1 photo of Gjerdingenite-Fe associated with Lorenzenite | Na2Ti2(Si2O6)O3 |
Related Minerals - Strunz-mindat Grouping
9.CE. | Dutkevichite-(Ce) | NaZnBa2Ce2Ti2Si8O26F · H2O |
9.CE. | Niobobaotite | Ba4(Ti2.5Fe2+1.5)Nb4Si4O28Cl |
9.CE.05 | Papagoite | CaCu[H3AlSi2O9] |
9.CE.10 | Verplanckite | Ba4Mn2+2Si4O12(OH,H2O)3Cl3 |
9.CE.15 | Baotite | Ba4(Ti,Nb,W)8O16(SiO3)4Cl |
9.CE.20 | Nagashimalite | Ba4(V,Ti)4B2Si8O27(O,OH)2Cl |
9.CE.20 | Taramellite | Ba4(Fe3+,Ti,Fe2+,Mg)4(B2Si8O27)O2Clx |
9.CE.20 | Titantaramellite | Ba4(Ti,Fe3+,Fe2+,Mg)4(B2Si8O27)O2Clx |
9.CE.25 | Bario-orthojoaquinite | (Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O |
9.CE.25 | Byelorussite-(Ce) | NaBa2Ce2MnTi2[Si4O12]2O2(F,OH) · H2O |
9.CE.25 | Joaquinite-(Ce) | NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O |
9.CE.25 | Orthojoaquinite-(Ce) | NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O |
9.CE.25 | Strontiojoaquinite | Sr2Ba2(Na,Fe)2Ti2[Si4O12]2O2(O,OH)2 · H2O |
9.CE.25 | Strontio-orthojoaquinite | (Na,Fe)2Sr2Ba2Ti2[Si4O12]2O2(O,OH)2 · H2O |
9.CE.25 | Orthojoaquinite-(La) | NaBa2La2Fe2+Ti2[Si4O12]2O2(O,OH) · H2O |
9.CE.30a | Unnamed (Ca-Na-ordered analogue of Korobitsynite) | (Ca,Na)2(Ti,Nb)2(Si4O12)(OH,O)2 · 3-4H2O |
9.CE.30e | Labuntsovite-Mn | Na4K4(Ba,K)2Mn2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10-12H2O |
9.CE.30a | Nenadkevichite | (Na,◻)8Nb4(Si4O12)2(O,OH)4 · 8H2O |
9.CE.30d | Lemmleinite-K | K2(Ti,Nb)2(Si4O12)(OH,O)2 · 4H2O |
9.CE.30a | Korobitsynite | Na2(Ti,Nb)2(Si4O12)(OH,O)2 · 3-4H2O |
9.CE.30c | Kuzmenkoite-Mn | K2Mn2+(Ti,Nb)4(Si4O12)2(OH,O)4 · 5-6H2O |
9.CE.30b | Vuoriyarvite-K | K2(Nb,Ti)2(Si4O12)(O,OH)2 · 4H2O |
9.CE.30b | Tsepinite-Na | Na2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O |
9.CE.30c | Karupmøllerite-Ca | (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 7H2O |
9.CE.30e | Labuntsovite-Mg | Na4K4(Ba,K)2Mg(Ti,Nb)8(Si4O12)4(O,OH)8 · 10H2O |
9.CE.30e | Labuntsovite-Fe | Na4K4(Ba,K)2Fe2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10H2O |
9.CE.30d | Lemmleinite-Ba | Na2K2Ba(Ti,Nb)4(Si4O12)2(O,OH)4 · 5H2O |
9.CE.30h | Neskevaaraite-Fe | K3Na2Fe2+(Ti,Nb)4(Si4O12)2(O,OH)4 · 5-6 H2O |
9.CE.30b | Tsepinite-K | K2(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O |
9.CE.30b | Paratsepinite-Ba | Ba4(Ti,Nb)8(Si4O12)4(OH,O)8 · 8H2O |
9.CE.30b | Tsepinite-Ca | Ca(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O |
9.CE.30h | Alsakharovite-Zn | NaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2O |
9.CE.30c | Gjerdingenite-Mn | K2Mn2+(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O |
9.CE.30c | Lepkhenelmite-Zn | (Ba,K)2Zn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2O |
9.CE.30b | Tsepinite-Sr | Sr(Ti,Nb)2(Si4O12)(OH,O)2 · 3H2O |
9.CE.30b | Paratsepinite-Na | (Na,Sr,K,Ca)7(Ti,Nb)8(Si4O12)4(O,OH)8 · nH2O n ~ 8 |
9.CE.30f | Paralabuntsovite-Mg | Na8K8Mg4Ti16(Si4O12)8(OH,O)16 · 20-24H2O |
9.CE.30c | Gjerdingenite-Ca | K2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O |
9.CE.30c | Gjerdingenite-Na | K2Na(Nb,Ti)4(Si4O12)2(OH,O)4 · 5H2O |
9.CE.30h | Gutkovaite-Mn | K2CaMn(Ti,Nb)4(Si4O12)2(O,OH)4 · 5H2O |
9.CE.30c | Kuzmenkoite-Zn | K2Zn(Ti,Nb)4(Si4O12)2(OH,O)4 · 6-8H2O |
9.CE.30g | Organovaite-Mn | K2Mn(Nb,Ti)4(Si4O12)2(O,OH)4 · 5-7H2O |
9.CE.30g | Organovaite-Zn | K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O |
9.CE.30g | Parakuzmenkoite-Fe | (K,Ba)4Fe(Ti,Nb)8(Si4O12)4(O,OH)8 · 14H2O |
9.CE.30c | Burovaite-Ca | (Na,K)4Ca2(Ti,Nb)8(Si4O12)4(OH,O)8 · 12H2O |
9.CE.45 | Komarovite | (Ca,Mn)(Nb,Ti)2[Si2O7](O,F)3 · 3.5H2O |
9.CE.45 | Natrokomarovite | (Na,Ca,H)2Nb2Si2O10(OH,F)2 · H2O |
Fluorescence of Gjerdingenite-Fe
none
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 Gjerdingenite-Fe
mindat.org URL:
https://www.mindat.org/min-11458.html
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References for Gjerdingenite-Fe
Localities for Gjerdingenite-Fe
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.
Norway (TL) | |
| Raade et al. (2002) |
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Gjerdingselva, Lunner, Viken, Norway