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Juonniite

A valid IMA mineral species
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08190220014948062681071.jpg
Juonniite

Kovdor Zheleznyi Mine, Kovdor Massif, Murmansk Oblast, Russia
02349520014962174028080.jpg
Juonniite

Kovdor Zheleznyi Mine, Kovdor Massif, Murmansk Oblast, Russia
01607080014947075426494.jpg
Juonniite

Kovdor Zheleznyi Mine, Kovdor Massif, Murmansk Oblast, Russia
08190220014948062681071.jpg
Juonniite

Kovdor Zheleznyi Mine, Kovdor Massif, Murmansk Oblast, Russia
01084880014961058775359.jpg
Juonniite

Kovdor Zheleznyi Mine, Kovdor Massif, Murmansk Oblast, Russia
01607080014947075426494.jpg
Juonniite

Kovdor Zheleznyi Mine, Kovdor Massif, Murmansk Oblast, Russia
08190220014948062681071.jpg
Juonniite

Kovdor Zheleznyi Mine, Kovdor Massif, Murmansk Oblast, Russia
02349520014962174028080.jpg
Juonniite

Kovdor Zheleznyi Mine, Kovdor Massif, Murmansk Oblast, Russia
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About JuonniiteHide

Formula:
CaMgSc(PO4)2(OH) · 4H2O
Colour:
Gray to bright orange
Lustre:
Vitreous
Hardness:
4 - 4½
Specific Gravity:
2.43
Crystal System:
Orthorhombic
Name:
The name alludes to the type locality, near the Yona or Juonni River (from the Russian or Finnish, respectively). Pronounced YO'NAITE.
Unique combination of elements.


Unique IdentifiersHide

Mindat ID:
7126
Long-form identifier:
mindat:1:1:7126:6
GUID
(UUID V4):
144397c1-a0b6-4e3e-86f5-56bc8fd8050e

IMA Classification of JuonniiteHide

Classification of JuonniiteHide

Strunz-mindat (2023):
8.DH.20

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
H : With large and medium-sized cations, (OH, etc.):RO4 < 1:1

Mineral SymbolsHide

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

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

Physical Properties of JuonniiteHide

Lustre:
Vitreous
Transparency:
Translucent
Colour:
Gray to bright orange
Streak:
White
Hardness:
4 - 4½ on Mohs scale
Hardness:
VHN20=330 kg/mm2 - Vickers
Cleavage:
None Observed
Density:
2.43(3) g/cm3 (Measured)    2.44 g/cm3 (Calculated)
Comment:
Calculated density 2.39–2.47.

Optical Data of JuonniiteHide

Type:
Biaxial (-)
RI values:
nα = 1.574(1) nβ = 1.579(1) nγ = 1.582(2)
2V:
Calculated: 70°
Max Birefringence:
δ = 0.008
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
none

Chemistry of JuonniiteHide

Mindat Formula:
CaMgSc(PO4)2(OH) · 4H2O
Elements listed:
Ca, H, Mg, O, P, Sc - search for minerals with similar chemistry

Crystallography of JuonniiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pbca
Setting:
Pbca
Cell Parameters:
a = 15.03(5) Å, b = 18.95(4) Å, c = 7.59(1) Å
Ratio:
a:b:c = 0.793 : 1 : 0.401
Unit Cell V:
2,161.77 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Platy crystals, subparallel, curved, to 12 µm, in spherulites
Comment:
Space Group: by analogy to overite

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.49 Å(100)
4.75 Å(17)
3.440 Å(31)
2.942 Å(27)
2.912 Å(44)
2.890 Å(35)
2.018 Å(15)

Geological EnvironmentHide

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

Type Occurrence of JuonniiteHide

Type Locality:
ⓘ Kovdor Zheleznyi Mine, Kovdor Massif, Murmansk Oblast, Russia
General Appearance of Type Material:
Spherulites, to 0.8 mm across, consisting of subparallel, commonly curved, plates up to 12 mm across and 2 mm thick.
Place of Conservation of Type Material:
St. Petersburg Mining Institute, St. Petersburg, Russia.
Geological Setting of Type Material:
Incrustations in cavities and along contacts with ore minerals in metasomatically reworked calcite-phlogopite-clinohumite-magnetite ores in a calcite-dolomite carbonatitic stockwork zone.
Associated Minerals at Type Locality:
ZirconTalcStrontiowhitlockitePyriteMagnesite
KovdorskiteHydrotalcite-2HHydrotalciteGypsumCollinsite
CollinsiteChlorite GroupBobierriteBobierriteBaryte
BaddeleyiteApatite
Reference:
Liferovich, R.P., Yakovenchuk, V.N., Pakhomovsky, Y.A., Bogdanova, A.N., Britvin, S.N. (1997) Juonniite, a new mineral of scandium from dolomitic carbonatites of the Kovdor massif. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 126(4): 80-88.

Synonyms of JuonniiteHide

Other Language Names for JuonniiteHide

German:Juonniit
Simplified Chinese:水磷钪钙镁石
Spanish:Juonniita
Traditional Chinese:水磷鈧鈣鎂石

Related Minerals - Strunz-mindat GroupingHide

8.DH.FerroberauniteFe2+Fe3+5(PO4)4(OH)5 · 6H2OMon. 2/m : B2/b
8.DH.Rowleyite[Na(NH4,K)9Cl4][V5+,4+2(P,As)O8]6 · n[H2O,Na,NH4,K,Cl]Iso.
8.DH.Ammoniotinsleyite(NH4)Al2(PO4)2(OH) · 2H2OMon. 2/m : P21/m
8.DH.Thebaite-(NH4)(NH4)3Al(C2O4)(PO3OH)2(H2O)Mon. 2/m : P21/b
8.DH.Dendoraite-(NH4)(NH4)2NaAl(C2O4)(PO3OH)2(H2O)2Mon. 2/m
8.DH.Whiteite-(MnMnMn)Mn2+Mn2+Mn2+2Al2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.Whiteite-(CaMnFe)CaMnFe2Al2(PO4)4(OH)2 · 8H2OMon. 2/m
8.DH.HochleitneriteMn2Ti3(PO4)4O2(H2O)2 · 14H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.RegeriteKFe6(PO4)4(OH)7(H2O)6 · 4H2OMon. 2/m : P21/b
8.DH.05MinyuliteKAl2(PO4)2F · 4H2OOrth. mm2 : Pba2
8.DH.10LeucophosphiteKFe3+2(PO4)2(OH) · 2H2OMon. 2/m : P21/b
8.DH.10Spheniscidite(NH4,K)(Fe3+,Al)2(PO4)2(OH) · 2H2OMon. 2/m
8.DH.10TinsleyiteKAl2(PO4)2(OH) · 2H2OMon.
8.DH.15Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnMn){Ca}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15KeckiteCaMn2+(Fe3+Mn2+)Fe3+2(PO4)4(OH)3 · 7H2OMon. 2/m : P2/b
8.DH.15Rittmannite{(Mn2+,Ca)}{Mn2+}{(Fe2+,Mn2+,Mg)2}{(Al,Fe3+)2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Whiteite-(CaFeMg){Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15Whiteite-(CaMnMg){Ca}{Mn2+}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m
8.DH.15Whiteite-(MnFeMg){(Mn2+,Ca)}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15Jahnsite-(MnMnMn){Mn2+}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P21/b
8.DH.15Kaluginite(Mn2+,Ca)MgFe3+(PO4)2(OH) · 4H2OOrth.
8.DH.15Jahnsite-(CaFeFe){Ca}{Fe2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon.
8.DH.15Jahnsite-(NaFeMg)NaFe3+Mg2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(NaMnMg){(Na,Ca)}{(Mn2+,Fe3+)}{(Mg,Fe3+)2}{Fe3+2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMgMg){Ca}{Mg}{Mg2}{Fe3+2}(PO4)4(OH)2 · 8H2O
8.DH.15Whiteite-(CaMnMn){Ca}{Mn2+}{Mn2}{Al2}(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Whiteite-(MnMnMg)MnMnMg2Al2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(MnMnMg)Mn2+Mn2+Mg2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaFeMg)CaFe2+Mg2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(MnMnFe)Mn2+Mn2+Fe2+2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Whiteite-(CaMgMg)CaMg3Al2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(MnMnZn)Mn2+Mn2+Zn2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(NaMnMn)NaMn2+(Mn2+Fe3+)Σ2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.15Jahnsite-(CaMnZn)CaMn2+Zn2Fe3+2(PO4)4(OH)2 · 8H2OMon. 2/m : P2/b
8.DH.20Lun'okite(Mn,Ca)(Mg,Fe,Mn)Al(PO4)2OH · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.20Manganosegelerite(Mn2+,Ca)(Mn2+,Fe2+,Mg)Fe3+(PO4)2(OH) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.20OveriteCaMgAl(PO4)2(OH) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.20SegeleriteCa2 Mg2 Fe3+2(PO4)4(OH)2 · 8H2OOrth. mmm (2/m 2/m 2/m) : Pcca
8.DH.20WilhelmvierlingiteCaMnFe3+(PO4)2(OH) · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.25CalcioferriteCa2Fe3+2(PO4)3(OH) · 7H2OMon. 2/m : B2/b
8.DH.25KingsmountiteCa3MnFeAl4(PO4)6(OH)4 · 12H2OTric. 1 : P1
8.DH.25MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2OMon. 2 : B2
8.DH.25ZodaciteCa4Mn2+Fe3+4(PO4)6(OH)4 · 12H2OMon.
8.DH.25FanfaniiteCa4MnAl4(PO4)6(OH)4 · 12H2OMon. 2/m : B2/b
8.DH.30ArseniosideriteCa2Fe3+3(AsO4)3O2 · 3H2OMon. 2/m : B2/b
8.DH.30KolfaniteCa2Fe3+3O2(AsO4)3 · 2H2OMon.
8.DH.30MitridatiteCa2Fe3+3(PO4)3O2 · 3H2OMon. 2/m : B2/b
8.DH.30PararobertsiteCa2Mn3+3(PO4)3O2 · 3H2OMon. 2/m : P21/b
8.DH.30RobertsiteCa2Mn3+3(PO4)3O2 · 3H2OMon. m : Bb
8.DH.30Sailaufite(Ca,Na,◻)2Mn3+3(AsO4)2(CO3)O2 · 3H2OMon. m : Bm
8.DH.35MantienneiteKMg2Al2Ti(PO4)4(OH)3 · 15H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.35PaulkerriteK(Mg,Mn2+)2(Fe3+,Al,Ti,Mg)2Ti(PO4)4(OH)3 · 15H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.35Benyacarite(H2O)2Mn2Ti2Fe3+(PO4)4(OF)(H2O)10 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
8.DH.40XanthoxeniteCa4Fe3+2(PO4)4(OH)2 · 3H2OTric. 1 : P1
8.DH.45MahnertiteNaCu3(AsO4)2Cl · 5H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
8.DH.50AndyrobertsiteKCdCu5(AsO4)4(H2AsO4) · 2H2OMon. 2/m : P21/m
8.DH.50CalcioandyrobertsiteKCaCu5(AsO4)4(H2AsO4) · 2H2OMon. 2/m : P21/m
8.DH.55EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2OMon. 2/m
8.DH.60BouazzeriteBi6(Mg,Co)11Fe3+14(AsO4)18(OH)4O12 · 86H2OMon. 2/m
8.DH.65GalliskiiteCa4Al2(PO4)2F8 · 5H2OTric. 1 : P1
8.DH.70JoteiteCa2CuAl(AsO4)[AsO3(OH)]2(OH)2 · 5H2OTric. 1 : P1
8.DH.75KampeliteBa6Mg3Sc8(PO4)12(OH)6 · 7H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.DH.80KapundaiteNaCaFe4(PO4)4(OH)3 · 5H2OTric. 1 : P1
8.DH.85VaniniiteCa2Mn2+3Mn3+2O2(AsO4)4 · 2H2OMon. 2/m : P21/b

Fluorescence of JuonniiteHide

Other InformationHide

IR Spectrum:
Absorption bands at 435, 447, 546, 582, 641, 878, 1022, 1050, 1120, 1435, 1663, 3025, 3130, 3410, and 3500 cm-1, corresponding to (H2O)4, (OH)-, and (PO4)3- groups.
Notes:
Slowly soluble in 10% HCl
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 JuonniiteHide

References for JuonniiteHide

Reference List:
Mineralogical Record: 29: 473.
Liferovich, R. P., Yakovenchuk, V. N., Pakhomovsky, Y. A., Bogdanova, A. N., Britvin, S. N. (1997) Juonniite, a new mineral of scandium from dolomitic carbonatites of the Kovdor massif. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 126 (4) 80-88
Jambor, J.L., Pertsev, N.N., Roberts, A.C. (1998) New mineral names. American Mineralogist: 83: 907-911.

Localities for JuonniiteHide

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.
Russia
 
  • Murmansk Oblast
Ivanyuk, Gregory Yu., Andrey O. Kalashnikov, Yakov A. Pakhomovsky, Ayya V. Bazai, Pavel M. Goryainov, Julia A. Mikhailova, Victor N. Yakovenchuk, and Nataly G. Konopleva. 2017. "Subsolidus Evolution of the Magnetite-Spinel-UlvöSpinel Solid Solutions in the Kovdor Phoscorite-Carbonatite Complex, NW Russia" Minerals 7, no. 11: 215. https://doi.org/10.3390/min7110215
The Mineralogical Record, 32, 413.
Liferovich, R. P., Yakovenchuk, V. N., Pakhomovsky, Y. A., Bogdanova, A. N., Britvin, S. N. (1997) Juonniite, a new mineral of scandium from dolomitic carbonatites of the Kovdor massif. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 126 (4) 80-88
Pekov, Igor V. (1998) Minerals first discovered on the territory of the former Soviet Union. Ocean Pictures, Moscow. 369pp.
Yakovenchuk, V. N., Ivanyuk, G. Yu., Mikhailova, Y. A., Selivanova, E. A., Krivovichev, S. V. (2006) Pakhomovskyite, Co3(PO4)2·8H2O, a new mineral species from Kovdor, Kola Peninsula, Russia. The Canadian Mineralogist, 44 (1) 117-123 doi:10.2113/gscanmin.44.1.117
Mikhailova, J. A., Kalashnikov, A. O., Sokharev, V. A., Pakhomovsky, Y. A., Konopleva, N. G., Yakovenchuk, V. N., ... & Ivanyuk, G. Y. (2016). 3D mineralogical mapping of the Kovdor phoscorite–carbonatite complex (Russia). Mineralium Deposita, 51(1), 131-149.
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