Kvanefjeldite
A valid IMA mineral species
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About Kvanefjeldite
The Kvanefjeld Mountain, Greenland.
Kvanefjeld adit, Kvanefjeld deposit, Kuannersuit Plateau, Ilímaussaq complex, Kujalleq, Greenland
Kvanefjeld adit, Kvanefjeld deposit, Kuannersuit Plateau, Ilímaussaq complex, Kujalleq, Greenland
Formula:
Na4(Ca,Mn)(Si3O7)2(OH)2
Colour:
Pink with a distinct violet hue
Lustre:
Vitreous, Pearly
Hardness:
5½ - 6
Specific Gravity:
2.55
Crystal System:
Orthorhombic
Name:
Named after the type locality, Kvanefjeld mountain, Greenland.
This page provides mineralogical data about Kvanefjeldite.
Unique Identifiers
Mindat ID:
2302
Long-form identifier:
mindat:1:1:2302:9
GUID
(UUID V4):
(UUID V4):
fb24ea09-ee7f-4b89-bc1f-a6d977ea01ec
IMA Classification of Kvanefjeldite
Approved
IMA Formula:
Na4CaSi6O14(OH)2
First published:
1984
Classification of Kvanefjeldite
9.DP.30
9 : SILICATES (Germanates)
D : Inosilicates
P : Transitional ino-phyllosilicate structures
9 : SILICATES (Germanates)
D : Inosilicates
P : Transitional ino-phyllosilicate structures
72.5.3.1
72 : PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
5 : Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with corrugated and complex layers
72 : PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
5 : Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with corrugated and complex layers
14.18.28
14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
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 |
---|---|---|
Kva | 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 Kvanefjeldite
Vitreous, Pearly
Transparency:
Transparent
Comment:
almost pearly on the {010} cleavage
Colour:
Pink with a distinct violet hue
Hardness:
5½ - 6 on Mohs scale
Cleavage:
Distinct/Good
Good on f010g; poor on {101}
Good on f010g; poor on {101}
Density:
2.55 g/cm3 (Measured) 2.53 g/cm3 (Calculated)
Optical Data of Kvanefjeldite
Type:
Biaxial (+)
RI values:
nα = 1.522(1) nβ = 1.522(1) nγ = 1.543(1)
Max Birefringence:
δ = 0.021
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:
Low
Dispersion:
r < v distinct
Chemistry of Kvanefjeldite
Mindat Formula:
Na4(Ca,Mn)(Si3O7)2(OH)2
Common Impurities:
Ti,Al,Y,Fe,Mg,K
Crystallography of Kvanefjeldite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 10.213(2) Å, b = 15.878(4) Å, c = 9.058(1) Å
Ratio:
a:b:c = 0.643 : 1 : 0.57
Unit Cell V:
1,468.86 ų (Calculated from Unit Cell)
Z:
4
Comment:
Space Group: Pcab
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) |
---|---|---|---|---|---|---|---|
0014783 | Kvanefjeldite | Johnsen O, Leonardsen E S, Falth L, Annehed H (1983) Crystal structure of kvanefjeldite: The introduction of [Si3O7OH] layers with eight-membered rings Neues Jahrbuch fur Mineralogie, Monatshefte 1983 505-512 | 1983 | Ilimaussaq alkaline intrusion, South Greenland | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.117 Å | (10) |
4.355 Å | (7) |
3.880 Å | (7) |
4.447 Å | (6) |
3.388 Å | (6) |
3.313 Å | (5) |
2.576 Å | (5) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
22 : Hydration and low-𝑇 subsurface aqueous alteration (see also #23) |
Type Occurrence of Kvanefjeldite
General Appearance of Type Material:
Streaks and veinlets
Place of Conservation of Type Material:
University of Copenhagen, Copenhagen, Denmark, 1983.136, GGU 47887; Harvard University, Cambridge, Massachusetts, 127475; National Museum of Natural History, Washington, D.C., USA, 162234.
Geological Setting of Type Material:
Alkaline intrusive complex
Associated Minerals at Type Locality:
Reference:
Petersen, O.V., Johnsen, O., Leonardsen, E.S., Rønsbo, J.G. (1984) Kvanefjeldite, a new mineral species from the Ilímaussaq Alkaline Complex, southwest Greenland. The Canadian Mineralogist: 22: 465-467.
Synonyms of Kvanefjeldite
Other Language Names for Kvanefjeldite
German:Kvanefjeldit
Spanish:Kvanefjeldita
Common Associates
Associated Minerals Based on Photo Data:
2 photos of Kvanefjeldite associated with Villiaumite | NaF |
Related Minerals - Strunz-mindat Grouping
9.DP. | Ferriprehnite | Ca2Fe3+(Si3AlO10)(OH)2 |
9.DP.05 | Meliphanite | (Ca,Na)2(Be,Al)[Si2O6(OH,F)] |
9.DP.15 | Leucosphenite | BaNa4Ti2B2Si10O30 |
9.DP.20 | Prehnite | Ca2Al2Si3O10(OH)2 |
9.DP.25 | Amstallite | CaAl[(Al,Si)4O8(OH)2](OH)2 · (H2O,Cl) |
9.DP.35 | Lemoynite | (Na,K)2CaZr2Si10O26 · 5H2O |
9.DP.35 | Natrolemoynite | Na4Zr2Si10O26 · 9H2O |
9.DP.35 | Hogarthite | (Na,K)2CaTi2Si10O26 · 8H2O |
9.DP.40 | Altisite | Na3K6Ti2Al2Si8O26Cl3 |
9.DP.45 | Chiappinoite-(Y) | Y2Mn(Si3O7)4 |
9.DP.50 | Esquireite | BaSi6O13 · 7H2O |
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 Kvanefjeldite
mindat.org URL:
https://www.mindat.org/min-2302.html
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Please feel free to link to this page.
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References for Kvanefjeldite
Reference List:
Petersen, Ole V., Johnsen, Ole, Leonardsen, Erik S., Ronsbo, Jorn G. (1984) Kvanefjeldite, a new mineral species from the Ilimaussaq alkaline complex, Southwest Greenland. The Canadian Mineralogist, 22 (3) 465-467
Localities for Kvanefjeldite
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.
Greenland | |
| Petersen (2001) |
| Knut Eldjarn collection and photo ID: ... +1 other reference |
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Kvanefjeld adit, Kvanefjeld deposit, Kuannersuit Plateau, Ilímaussaq complex, Kujalleq, Greenland