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Agrellite

A valid IMA mineral species
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About AgrelliteHide

02770000015367868351244.jpg
Stuart O. Agrell
Formula:
NaCa2Si4O10F
Colour:
White to greyish or greenish white.
Lustre:
Pearly
Hardness:
Specific Gravity:
2.902
Crystal System:
Triclinic
Name:
Named in honor of Stuart Olof Agrell (5 March 1913, Ruislip, Middlesex, UK – 29 January 1996), British mineralogist and meteoricist at Cambridge University. He was popular in the United Kingdom for his public television and radio appearances discussing the collection of lunar rocks and soils during the Apollo missions.
This page provides mineralogical data about Agrellite.


Unique IdentifiersHide

Mindat ID:
57
Long-form identifier:
mindat:1:1:57:0
GUID
(UUID V4):
b045fa9a-8d29-4cd7-aee0-06130926dfa2

IMA Classification of AgrelliteHide

Classification of AgrelliteHide

9.DH.75

9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
70.1.1.4

70 : INOSILICATES Column or Tube Structures
1 : Column or Tube Structures with columnar silicate units
17.1.3

17 : Silicates Containing other Anions
1 : Silicates with fluoride (not containing Al)

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
AreIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of AgrelliteHide

Pearly
Transparency:
Transparent, Translucent
Comment:
Pearly on cleavages.
Colour:
White to greyish or greenish white.
Streak:
White
Hardness:
5½ on Mohs scale
Cleavage:
Perfect
Excellent on {110} and {110}, poor on {010}
Density:
2.902 g/cm3 (Measured)    2.887 g/cm3 (Calculated)

Optical Data of AgrelliteHide

Type:
Biaxial (-)
RI values:
nα = 1.567 nβ = 1.579 nγ = 1.581
2V:
Calculated: 47°
Max Birefringence:
δ = 0.014
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r > v strong

Chemistry of AgrelliteHide

Mindat Formula:
NaCa2Si4O10F

Crystallography of AgrelliteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.759(2) Å, b = 18.946(3) Å, c = 6.986(1) Å
α = 89.88(2)°, β = 116.65(2)°, γ = 94.32(2)°
Ratio:
a:b:c = 0.41 : 1 : 0.369
Unit Cell V:
914.67 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals elongated k [001], to 10 cm; platy aggregates.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0000722AgrelliteGhose S, Wan C (1979) Agrellite, Na(Ca,RE)2Si4O10F: A layer structure with silicate tubes American Mineralogist 64 563-57219790293
0019049AgrelliteRozhdestvenskaya I V, Nikishova L V (1998) Crystal structure of Na(Ca,Sr)2Si4O10F strontium agrellite from Yakutian charoitites: agrellite polytypes Crystallography Reports 43 589-5971998Sirenevyi Kamen deposit, Murunskii massif, Yakutia, Russia0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.19 Å(vs)
3.14 Å(vs)
3.44 Å(s)
3.33 Å(s)
2.58 Å(s)
2.31 Å(s)
2.04 Å(ms)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of AgrelliteHide

Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa;
University of Toronto, Toronto;
Royal Ontario Museum, Toronto, Canada, M34496;
Harvard University, Cambridge, Massachusetts, 117050; National Museum of Natural History, Washington, D.C., USA, 127007;
Cambridge Un
Geological Setting of Type Material:
In pegmatite lenses and pods and in mafic gneisses in a regionally metamorphosed agpaitic alkalic rock complex
Associated Minerals at Type Locality:
Reference:
Gittins, J., Bown, M.G., Sturman, D. (1976) Agrellite, a new rock-forming mineral in regionally metamorphosed agpaitic alkalic rocks. The Canadian Mineralogist: 14: 120-126.

Synonyms of AgrelliteHide

Other Language Names for AgrelliteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
107 photos of Agrellite associated with EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
60 photos of Agrellite associated with AlbiteNa(AlSi3O8)
27 photos of Agrellite associated with VlasoviteNa2ZrSi4O11
25 photos of Agrellite associated with Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
17 photos of Agrellite associated with CalciteCaCO3
15 photos of Agrellite associated with NephelineNa3K(Al4Si4O16)
12 photos of Agrellite associated with GittinsiteCaZrSi2O7
12 photos of Agrellite associated with ThoriteTh(SiO4)
9 photos of Agrellite associated with FluoriteCaF2
8 photos of Agrellite associated with AegirineNaFe3+Si2O6

Related Minerals - Strunz-mindat GroupingHide

9.DH.Gageite-2M(Mn,Mg,Zn)42Si16O54(OH)40Mon. 2/m
9.DH.BavsiiteBa2V2O2[Si4O12]Tet. 4/m : I4/m
9.DH.DevilliersiteCa4Ca2Fe3+10O4[(Fe3+10Si2)O36]Tric. 1 : P1
9.DH.YuzuxiangiteSr3Fe3+(Si2O6)2(OH) · 3H2OMon. 2/m : P21/m
9.DH.LouisfuchsiteCa2(Mg4Ti2)(Al4Si2)O20Tric. 1 : P1
9.DH.05LeucophaniteNaCaBeSi2O6FOrth. 2 2 2 : P21 21 21
9.DH.10OhmiliteSr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2OMon. 2/m : P21/m
9.DH.15HaradaiteSrVSi2O7Orth. mmm (2/m 2/m 2/m)
9.DH.15SuzukiiteBaVSi2O7Orth.
9.DH.20BatisiteBaNaNaTi2(Si4O12)O2Orth. mmm (2/m 2/m 2/m) : Imma
9.DH.20Shcherbakovite(K,Ba)KNa(Ti,Nb)2(Si4O12)O2Orth. mmm (2/m 2/m 2/m) : Imma
9.DH.20NoonkanbahiteBaKNaTi2(Si4O12)O2Orth. mmm (2/m 2/m 2/m) : Imma
9.DH.25TaikaniteSr3BaMn2+2(Si4O12)O2Mon. 2 : B2
9.DH.30KrauskopfiteBaSi2O5 · 3H2OMon. 2/m : P21/b
9.DH.35Balangeroite(Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40Mon. 2/m
9.DH.35GageiteMn21(Si4O12)2O3(OH)20Mon. 2/m
9.DH.40AenigmatiteNa4[Fe2+10Ti2]O4[Si12O36]Tric. 1 : P1
9.DH.40DorriteCa4(Mg3Fe3+9)O4(Si3Al8Fe3+O36)Tric.
9.DH.40HĂžgtuvaiteCa4[Fe2+6Fe3+6]O4[Si8Be2Al2O36]Tric. 1 : P1
9.DH.40KrinoviteNa2Mg4Cr3+2(Si6O18)O2Tric. 1 : P1
9.DH.40Makarochkinite(Ca,Na)4[Fe2+8Fe3+2Ti2]O4[Si8Be2Al2O36]Tric. 1 : P1
9.DH.40RhöniteCa4[Mg8Fe3+2Ti2]O4[Si6Al6O36]Tric. 1 : P1
9.DH.40SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]Tric. 1 : P1
9.DH.40WelshiteCa4Mg9Sb3O4[Si6Be3AlFe2O36]Tric. 1 : P1
9.DH.40WilkinsoniteNa2Fe2+4Fe3+2(Si6O18)O2Tric. 1 : P1
9.DH.40LeucorhöniteCa2(Mg,Fe3+,Al)6(Si,Al)6O20Tric.
9.DH.40KuratiteCa2(Fe2+5Ti)O2[Si4Al2O18]Tric. 1 : P1
9.DH.40KhesiniteCa4(Mg3Fe3+9)O4(Fe3+9Si3)O36Tric. 1 : P1
9.DH.40UM1991-29-SiO:FeMgNaNa4(Mg5Fe3+7)O4[Si9Fe3+3O36]
9.DH.45SapphirineMg4(Mg3Al9)O4[Si3Al9O36]Mon. 2/m : P21/b
9.DH.50Khmaralite(Mg,Al,Fe)16[(Al,Si,Be)12O36]O4Mon. 2/m : P21/b
9.DH.55Surinamite(Mg,Fe)3Al4BeSi3O16Mon. 2/m
9.DH.55UM1988-26-SiO:AlMgMg4Al2O[Si3Al2O15]
9.DH.60Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5Mon. 2/m : P21/b
9.DH.65HowieiteNa(Fe,Mn)10(Fe,Al)2Si12O31(OH)13Tric.
9.DH.65Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44Tric.
9.DH.70JohninnesiteNa2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2Tric.

Fluorescence of AgrelliteHide

Fluoresces bright pink under LW UV and duller pink under SW UV.

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.

Internet Links for AgrelliteHide

References for AgrelliteHide

Localities for AgrelliteHide

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 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.
Canada (TL)
 
  • QuĂ©bec
    • Abitibi-TĂ©miscamingue
      • TĂ©miscamingue RCM
        • Les Lacs-du-TĂ©miscamingue
Smithsonian Museum USNM NUMBER: 169743 +1 other reference
China
 
  • Liaoning
    • Dandong
      • Kuandian County
- (1978) +3 other references
Russia
 
  • Aldan Shield
    • Chara and Tokko Rivers Confluence
[Lapis 1993:4 p.13-20]
Konev et al. (1996)
Dokuchits et al. (2022)
Konev et al. (1996)
  • Murmansk Oblast
Yakovenchuk et al. (2005)
    • Lovozersky District
Pakhomovsky et al. (2014)
Tajikistan
 
  • Districts of Republican Subordination
Agakhanov et al. (2008)
USA
 
  • Wisconsin
    • Marathon County
Rocks and Minerals (1987)
Rocks & Min.: 62: 190-193.
 
Mineral and/or Locality  
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