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Delhayelite

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About DelhayeliteHide

Formula:
(Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3 · 18H2O
Colour:
Colourless; Silver-grey, Greenish-grey
Crystal System:
Orthorhombic
Name:
Named in 1959 by Th. G. Sahama and K. Hytönen after Fernand Delhaye (Clermont-Ferrand February 4 1880 - Saint-Gillis (Brussels) December 15 1946), of Belgian nationality. He worked in Central Africa.
Easily hydrothermally altered to hydrodelhayelite


Classification of DelhayeliteHide

Approved
9.EB.10

9 : SILICATES (Germanates)
E : Phyllosilicates
B : Double nets with 4- and 6-membered rings
72.5.1.4

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
17.10.9

17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate

Physical Properties of DelhayeliteHide

Colour:
Colourless; Silver-grey, Greenish-grey

Optical Data of DelhayeliteHide

Type:
Biaxial (-)
RI values:
nα = 1.532 nβ = 1.532 nγ = 1.532
2V:
Measured: 83°
Max Birefringence:
δ = 0.000
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
weak

Chemical Properties of DelhayeliteHide

Formula:
(Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3 · 18H2O
IMA Formula:
K7Na3Ca5Al2Si14O38F4Cl2
Common Impurities:
Ti,Fe,Mn,Mg

Crystallography of DelhayeliteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 13.06 Å, b = 24.65 Å, c = 7.04 Å
Ratio:
a:b:c = 0.53 : 1 : 0.286
Unit Cell V:
2,266.38 ų (Calculated from Unit Cell)

Type Occurrence of DelhayeliteHide

Place of Conservation of Type Material:
Royal Museum for Central Africa, Tervuren

Other Language Names for DelhayeliteHide

German:Delhayelit
Spanish:Delhayelita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Aegirine8 photos of Delhayelite associated with Aegirine on mindat.org.
Fenaksite3 photos of Delhayelite associated with Fenaksite on mindat.org.
Hisingerite3 photos of Delhayelite associated with Hisingerite on mindat.org.
Microcline2 photos of Delhayelite associated with Microcline on mindat.org.
Canasite1 photo of Delhayelite associated with Canasite on mindat.org.
Titanite1 photo of Delhayelite associated with Titanite on mindat.org.
Fivegite1 photo of Delhayelite associated with Fivegite on mindat.org.
Zircon1 photo of Delhayelite associated with Zircon on mindat.org.
Villiaumite1 photo of Delhayelite associated with Villiaumite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.EB.05MacdonalditeBaCa4Si16O36(OH)2 · 10H2OOrth.
9.EB.05RhodesiteKHCa2Si8O19 · 5H2OOrth. mmm (2/m 2/m 2/m)
9.EB.10HydrodelhayeliteKCa2AlSi7O17(OH)2 · 6H2OOrth.
9.EB.15Monteregianite-(Y)(Na,K)6(Y,Ca)2Si16O38 · 10H2OMon. 2/m
9.EB.20CarletoniteKNa4Ca4Si8O18(CO3)4(OH,F) · H2OTet. 4/mmm (4/m 2/m 2/m) : P4/mbm

Related Minerals - Dana Grouping (8th Ed.)Hide

72.5.1.1RhodesiteKHCa2Si8O19 · 5H2OOrth. mmm (2/m 2/m 2/m)
72.5.1.2Monteregianite-(Y)(Na,K)6(Y,Ca)2Si16O38 · 10H2OMon. 2/m
72.5.1.3MacdonalditeBaCa4Si16O36(OH)2 · 10H2OOrth.
72.5.1.5HydrodelhayeliteKCa2AlSi7O17(OH)2 · 6H2OOrth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.10.1NoseanNa8(Al6Si6O24)(SO4) · H2OIso. 4 3m : P4 3n
17.10.2PitiglianoiteNa6K2(Al6Si6O24)(SO4) · 2H2OHex.
17.10.3Vishnevite(Na,K)8(Al6Si6O24)(SO4,CO3) · 2H2OHex. 6 : P63
17.10.4Haüyne(Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)Iso. 4 3m : P4 3n
17.10.5Liottite(Na,K)16Ca8(Al6Si6O24)3(SO4)5Cl4Hex.
17.10.6Latiumite(Ca,K)4(Si,Al)5O11(SO4,CO3)Mon.
17.10.7Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2OMon.
17.10.8MicrosommiteNa4K2Ca2(Al6Si6O24)(SO4)Cl2Hex.
17.10.10HydrodelhayeliteKCa2AlSi7O17(OH)2 · 6H2OOrth.
17.10.11Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2Hex. 6/m : P63/m
17.10.12Afghanite(Na,K)22Ca10(Si24Al24O96)(SO4)6Cl6Trig. 3m : P3 1c
17.10.13Franzinite(Na,K)6Ca2(Al6Si6O24)(SO4)2 · 0.5H2OHex.
17.10.14Giuseppettite(Na,K,Ca)7-8(Al6Si6O24)(SO4,Cl)1-2Hex.
17.10.15Sacrofanite(Na61K19Ca32)(Si84Al84O336)(SO4)26Cl2F6•2H2OHex.
17.10.16Chessexite(Na,K)4Ca2(Mg,Zn)3Al8(SO4)10(SiO4)2 · 40H2OOrth.
17.10.17InneliteNa2CaBa4Ti3(Si2O7)2(SO4)2O4Tric. 1 : P1
17.10.18ThaumasiteCa3(SO4)[Si(OH)6](CO3) · 12H2OHex. 6 : P63
17.10.19Ellestadite
17.10.20ChlorellestaditeCa5(SiO4)1.5(SO4)1.5ClHex. 6/m : P63/m
17.10.21HydroxylellestaditeCa5(SiO4)1.5(SO4)1.5(OH)Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm
17.10.22FluorellestaditeCa5(SiO4)1.5(SO4)1.5FHex.
17.10.23MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)Hex. 6/m : P63/m
17.10.24QueititePb4Zn2(SO4)(SiO4)(Si2O7)Mon. 2 : P21
17.10.25RoeblingitePb2Ca6Mn2+(Si3O9)2(SO4)2(OH)2 · 4H2OMon. 2/m : B2/m
17.10.26YoshimuraiteBa2Mn2Ti(Si2O7)(PO4)O(OH)Tric. 1 : P1
17.10.27KegelitePb8Al4(Si8O20)(SO4)2(CO3)4(OH)8Mon.
17.10.28Wenkite(Ba,K)4(Ca,Na)6[(SO4)3|(Si,Al)20O39(OH)2] · 0.5H2OHex.
17.10.29MacquartiteCu2Pb7(CrO4)4(SiO4)2(OH)2Mon.
17.10.30WeliniteMn2+6(W6+,Mg)2(SiO4)2(O,OH)6Trig. 3 : P3

Fluorescence of DelhayeliteHide

Orange (from Khibiny, Russia)

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 DelhayeliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist: 44: 1321.

Internet Links for DelhayeliteHide

Localities for DelhayeliteHide

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.
Democratic Republic of the Congo
 
  • Nord-Kivu
    • Goma
Andersen, T., Elburg, M. A., & Erambert, M. (2014). Extreme peralkalinity in delhayelite-and andremeyerite-bearing nephelinite from Nyiragongo volcano, East African Rift. Lithos, 206, 164-178.
Mineralogical Magazine(1959) 32, 6-9
Morocco
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
Berger, J., Ennih, N., Mercier, J. C., Liégeois, J. P., & Demaiffe, D. (2009). The role of fractional crystallization and late-stage peralkaline melt segregation in the mineralogical evolution of Cenozoic nephelinites/phonolites from Saghro (SE Morocco). Mineralogical magazine, 73(1), 59-82.
Russia
 
  • Northern Region
    • Murmanskaya Oblast'
      • Khibiny Massif
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Yakovenchuk, V. N., Ivanyuk, G., Pakhomovsky, Y. & Men'shikov, Y. (2005): Khibiny. Apatity & London (Laplandia Minerals in association with the Mineral. Soc. of GB & Ireland), 468 pp
[World of Stones 95:5-6, p64]
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Takai, Y., Uehara, S., Inoo, T. (2011) Minerals from Khibiny, Kola, Russia. Chigaku Kenkyu, 60 (1), 41-46.; Arzamastsev, A., Yakovenchuk, V., Pakhomovsky, Y., & Ivanyuk, G. (2008). The Khibina and Lovozero alkaline massifs: Geology and unique mineralization. In Guidbook for 33rd International Geological Congress Excursion (No. 47, p. 58).
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Belakovskiy D, Smith D G W, Welch M (2013) New mineral names. American Mineralogist 98, 811-815
          • Rasvumchorr Mine
Pavel Kartashov specimens.; Sokolova et al (2005) New Data on Minerals Vol 40 pp115-118; Pekov I.V., Zubkova N.V., Filinchuk Ya.E., Chukanov N.V., Zadov A.E., Pushcharovsky D.Yu., Gobechiya E.R. (2010): Shlykovite, KCa[Si4O9(OH)]·3H2O, and cryptophyllite, K2Ca[Si4O10]·5H2O, two new mineral species from the Khibiny alkaline complex, Kola Peninsula, Russia. Zapiski RMO, 139(1), 37-50.
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Khomyakov, A. P., Pushcharovskiy, D. Y., & Ronsbo, J. G. (1983). Clinophosinaite, Na3CaPSiO7, a new mineral. International Geology Review, 25(6), 731-734.
Mineral and/or Locality  
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