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Juanite

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Compare also cebollite.


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Classification of JuaniteHide

IMA status:
Approved, 'Grandfathered' (first described prior to 1959), Questionable
Strunz 8th ed.:
8/D.17-10
Nickel-Strunz 10th (pending) ed.:
9.HA.70

9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
Dana 8th ed.:
78.7.6.1

78 : Unclassified Silicates
7 :
Hey's CIM Ref.:
16.11.6

16 : Silicates Containing Aluminum and other Metals
11 : Aluminosilicates of Ca and Mg with or without alkalis

Optical Data of JuaniteHide

Type:
Biaxial (+)
RI values:
nα = 1.640 nβ = 1.642 nγ = 1.647
2V:
Measured: 50° , Calculated: 66°
Max Birefringence:
δ = 0.007
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively weak

Chemical Properties of JuaniteHide

Formula:
Ca10Mg4Al2Si11O39 · 4H2O or near
IMA Formula:
Ca10(Mg,Fe2+)4(Si,Al)13(O,OH)39 · 4H2O (?)
Elements listed:
Al, Ca, Fe, H, Mg, O, Si - search for minerals with similar chemistry
Common Impurities:
Fe,Mn,Na,K,P

Type Occurrence of JuaniteHide

Other Language Names for JuaniteHide

German:Juanit
Spanish:Juanita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Alumoåkermanite2 photos of Juanite associated with Alumoåkermanite on mindat.org.
Cebollite2 photos of Juanite associated with Cebollite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.HA.05ErtixiiteNa2Si4O9
9.HA.10KenyaiteNa2Si22O41(OH)8 · 6H2OMon.
9.HA.20WawayandaiteCa6Mn2BBe9Si6O23(OH,Cl)15Mon.
9.HA.25MagbasiteKBaFe3+Mg7Si8O22(OH)2F6Orth. mmm (2/m 2/m 2/m) : Cmma
9.HA.30AfanasyevaiteCa8[Si2O7]OCl2
9.HA.40IgumnoviteCa3Al2(SiO4)2Cl4Iso.
9.HA.50RudenkoiteSr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2OMon.
9.HA.55FoshallasiteCa3[Si2O7] · 3H2O(?)
9.HA.60NagelschmidtiteCa7(SiO4)2(PO4)2Hex. 6 : P61
9.HA.65Caryochroite(Na,Sr)3(Fe3+,Mg)10[(O,OH)9|Ti2Si12O37] · (H2O,O,OH)17Mon.
9.HA.75TacharaniteCa12Al2Si18O33 (OH)36Mon.
9.HA.80OyeliteCa10Si8B2O29 · 12.5H2OOrth.
9.HA.85DenisoviteK14+x(Ca,Na,Mn,Fe)48[Si60O162]F16(Ox,OH4−x)·2H2OMon.
9.HA.90Tiettaite(Na,K)17FeTiSi16O29(OH)30 · 2H2OOrth. mmm (2/m 2/m 2/m) : Cmcm

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.11.1MadisoniteCa2Mg2Al2Si3O13 or near
16.11.3Alumino-magnesio-hornblende☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
16.11.4Tschermakite☐(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m
16.11.5ClintoniteCa(Mg,Al)3(Al3SiO10)(OH)2Mon. 2/m : B2/m
16.11.7Pumpellyite-(Mg)Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2OMon.
16.11.8TacharaniteCa12Al2Si18O33 (OH)36Mon.
16.11.9Aluminobarroisite☐{CaNa}{Mg3Al2}(AlSi7O22)(OH)2Mon.
16.11.10Taramite{Na}{CaNa}{Mg3Al2}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
16.11.12Edenite{Na}{Ca2}{Mg5}(AlSi7O22)(OH)2Mon.
16.11.13Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2Mon.
16.11.14Katophorite{Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2Mon. 2/m : B2/m
16.11.15Beidellite(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2OMon.
16.11.15Magnesiosadanagaite{Na}{Ca2}{Mg3Al2}(Al3Si5O22)(OH)2Mon. 2/m
16.11.16Sadanagaite{Na}{Ca2}{Mg3Al2}(Si5Al3O22)(OH)2Mon.

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 JuaniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1932): 17: 343.
Rodygina, V.G. (1971): The first find of juanite and cebollite in the Kuznetsk Alatau. Geologiya i Geofizika 12, 62-70. (Institute of Geology and Geophysics, Novosibirsk)

Internet Links for JuaniteHide

Localities for JuaniteHide

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.
Russia
 
  • Eastern-Siberian Region
    • Krasnoyarsk Krai
      • Maimecha and Kotui Rivers Basin
Pavel M. Kartashov data
    • Transbaikalia (Zabaykalye)
      • Yeniseisk Autonomous Oblast'
  • Northern Region
    • Murmanskaya Oblast'
Subbotin, R. P. L. V. V., & Pakhomovsky, Y. A. (1998). A new type of scandium mineralization in phoscorites and carbonatites of the Kovdor massif, Russia. Canadian Mineralogist 36:971-980.
USA (TL)
 
  • Colorado
    • Gunnison Co.
      • White Earth District (Powderhorn District)
"Minerals of Colorado, updated & revised", p. 17, by Eckel, Edwin B., 1997; USGS ProfessionaL Paper 197A
Mineral and/or Locality  
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