Juanite
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Formula:
Ca10Mg4Al2Si11O39 · 4H2O or near
Classification of Juanite
Approved, 'Grandfathered' (first described prior to 1959), Questionable
8/D.17-10
9.HA.70
9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
78.7.6.1
78 : Unclassified Silicates
7 :
78 : Unclassified Silicates
7 :
16.11.6
16 : Silicates Containing Aluminum and other Metals
11 : Aluminosilicates of Ca and Mg with or without alkalis
16 : Silicates Containing Aluminum and other Metals
11 : Aluminosilicates of Ca and Mg with or without alkalis
Optical Data of Juanite
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.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively weak
Chemical Properties of Juanite
Formula:
Ca10Mg4Al2Si11O39 · 4H2O or near
IMA Formula:
Ca10(Mg,Fe2+)4(Si,Al)13(O,OH)39 · 4H2O (?)
Common Impurities:
Fe,Mn,Na,K,P
Type Occurrence of Juanite
Other Language Names for Juanite
Common Associates
Associated Minerals Based on Photo Data:
| 2 photos of Juanite associated with Alumoåkermanite | (Ca,Na)2(Al,Mg,Fe2+)(Si2O7) |
| 2 photos of Juanite associated with Cebollite | Ca5Al2(SiO4)3(OH)4 |
Related Minerals - Nickel-Strunz Grouping
| 9.HA.05 | Ertixiite | Na2Si4O9 | Iso. |
| 9.HA.10 | Kenyaite | Na2Si22O41(OH)8 · 6H2O | Mon. |
| 9.HA.20 | Wawayandaite | Ca6Mn2BBe9Si6O23(OH,Cl)15 | Mon. |
| 9.HA.25 | Magbasite | KBaFe3+Mg7Si8O22(OH)2F6 | Orth. mmm (2/m 2/m 2/m) : Cmma |
| 9.HA.30 | Afanasyevaite | Ca8[Si2O7]OCl2 | |
| 9.HA.40 | Igumnovite | Ca3Al2(SiO4)2Cl4 | Iso. |
| 9.HA.50 | Rudenkoite | Sr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2O | Mon. |
| 9.HA.55 | Foshallasite | Ca3[Si2O7] · 3H2O(?) | |
| 9.HA.60 | Nagelschmidtite | Ca7(SiO4)2(PO4)2 | Hex. 6 : P61 |
| 9.HA.65 | Caryochroite | (Na,Sr)3(Fe3+,Mg)10[Ti2Si12O37] · (H2O,O,OH)17 | Mon. |
| 9.HA.75 | Tacharanite | Ca12Al2Si18O33 (OH)36 | Mon. |
| 9.HA.80 | Oyelite | Ca10Si8B2O29 · 12.5H2O | Orth. |
| 9.HA.85 | Denisovite | K14+x(Ca,Na,Mn,Fe)48[Si60O162]F16(Ox,OH4−x)·2H2O | Mon. |
| 9.HA.90 | Tiettaite | (Na,K)17FeTiSi16O29(OH)30 · 2H2O | Orth. mmm (2/m 2/m 2/m) : Cmcm |
Related Minerals - Hey's Chemical Index of Minerals Grouping
| 16.11.1 | Madisonite | Ca2Mg2Al2Si3O13 or near | |
| 16.11.3 | Alumino-magnesio-hornblende | ☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2 | |
| 16.11.4 | Tschermakite | ☐(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2 | Mon. 2/m : B2/m |
| 16.11.5 | Clintonite | Ca(Mg,Al)3(Al3SiO10)(OH)2 | Mon. 2/m : B2/m |
| 16.11.7 | Pumpellyite-(Mg) | Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O | Mon. |
| 16.11.8 | Tacharanite | Ca12Al2Si18O33 (OH)36 | Mon. |
| 16.11.9 | Aluminobarroisite | ☐{CaNa}{Mg3Al2}(AlSi7O22)(OH)2 | Mon. |
| 16.11.10 | Taramite | {Na}{CaNa}{Mg3Al2}(Al2Si6O22)(OH)2 | Mon. 2/m : B2/m |
| 16.11.12 | Edenite | {Na}{Ca2}{Mg5}(AlSi7O22)(OH)2 | Mon. |
| 16.11.13 | Pargasite | {Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2 | Mon. 2/m : B2/m |
| 16.11.14 | Katophorite | {Na}{CaNa}{Mg4Al}[(AlSi7)O22](OH)2 | Mon. 2/m : B2/m |
| 16.11.15 | Beidellite | (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O | Mon. |
| 16.11.15 | Magnesiosadanagaite | {Na}{Ca2}{Mg3Al2}(Al3Si5O22)(OH)2 | Mon. 2/m |
| 16.11.16 | Sadanagaite | {Na}{Ca2}{Mg3Al2}(Si5Al3O22)(OH)2 | Mon. |
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.
References for Juanite
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 Juanite
mindat.org URL:
https://www.mindat.org/min-2119.html
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Localities for Juanite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Russia | |
| Pavel M. Kartashov data |
| 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) | |
| "Minerals of Colorado, updated & revised", p. 17, by Eckel, Edwin B., 1997; USGS ProfessionaL Paper 197A |