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Juonniite Mineral Data

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General Juonniite Information

Help on Chemical  Formula: Chemical Formula: CaMgSc(PO4)2(OH)•4(H2O)
Help on Composition: Composition: Molecular Weight = 388.35 gm
   Calcium     10.32 %  Ca   14.44 % CaO
   Magnesium    6.26 %  Mg   10.38 % MgO
   Scandium    11.58 %  Sc   17.76 % Sc2O3
   Phosphorus  15.95 %  P    36.55 % P2O5
   Hydrogen     2.34 %  H    20.88 % H2O
   Oxygen      53.56 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaMgSc(PO4)2(OH)•4(H2O)
Help on Environment: Environment: Metasomatically reworked calcite-phlogopite-clinohumite-magnetite ores in a calcite-dolomite carbonatitic stockwork zone. The scandium dominant analog of overite and segelerite.
Help on IMA Status: IMA Status: Approved IMA 1997 (Dana # Added)
Help on Locality: Locality: Kovdor ultramafic alkaline complex, Yona or Juonni River (from the Russian or Finnish), Kola Peninsula, Russia). Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name alludes to the locality. Pronounced YO'NAITE.
Help on Name Pronunciation: Name Pronunciation: Juonniite + Pronunciation Say JUONNIITE
Help on Synonym: Synonym: IMA1996-060
 

Juonniite Image

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  Juonniite

Comments: Brownish grain of juonniite on matrix.
Location: Kovdor Mine, Kovdor massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Juonniite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7931:1:0.4005
Help on Cell Dimensions: Cell Dimensions: a = 15.03, b = 18.95, c = 7.59, Z = 8; V = 2,161.77 Den(Calc)= 2.39
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P bca
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.49(1), 2.912(0.44), 2.89(0.35),
 

Physical Properties of Juonniite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, Light yellow, Yellowish brown, Gray, Bright orange.
Help on Density: Density: 2.43
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 4-4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Juonniite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.015 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.242,KPDmeas= 0.238,KC= 0.2346
Ncalc = 1.56 - 1.57
Help on Optical Data: Optical Data: Biaxial (-), a=1.574, b=1.579, g=1.582, bire=0.0080
 

Calculated Properties of Juonniite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.45 gm/cc
note: Specific Gravity of Juonniite =2.43 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0066584309
Boson Index = 0.9933415691
Help on Photoelectric: Photoelectric: PEJuonniite = 3.78 barns/electron
U=PEJuonniite x rElectron Density= 9.28 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Juonniite is Not Radioactive
 

Juonniite Classification

Help on  Dana Class: Dana Class: 42.11.01.07 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.11)where (AB)4 (XO4)3 Zq � x(H2O)
  (42.11.01)Overite Group
 
42.11.01.01 Overite CaMgAl(PO4)2(OH)•4(H2O) Pcca 2/m 2/m 2/m
 
42.11.01.02 Segelerite CaMgFe(PO4)2(OH)•4(H2O) Pcca 2/m 2/m 2/m
 
42.11.01.03 Manganosegelerite (Mn,Ca)(Mn,Fe,Mg)Fe(PO4)2(OH)•4(H2O) P bca 2/m 2/m 2/m
 
42.11.01.04 Lunokite (Mn,Ca)(Mg,Fe,Mn)Al(PO4)2(OH)•4(H2O) P bca 2/m 2/m 2/m
 
42.11.01.05 Wilhelmvierlingite CaMnFe(PO4)2(OH)•2(H2O) P bca 2/m 2/m 2/m
 
42.11.01.06 Kaluginite* (Mn,Ca)MgFe(PO4)2(OH)•4(H2O) C cca 2/m 2/m 2/m
 
42.11.01.07 Juonniite! CaMgSc(PO4)2(OH)•4(H2O) P bca 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.DH.20 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DH -With large and medium-sized cations, (OH, etc.):RO4 < 1:1
 
08.DH.20 Manganosegelerite (Mn,Ca)(Mn,Fe,Mg)Fe(PO4)2(OH)•4(H2O) P bca 2/m 2/m 2/m
 
08.DH.20 Juonniite! CaMgSc(PO4)2(OH)•4(H2O) P bca 2/m 2/m 2/m
 
08.DH.20 Overite CaMgAl(PO4)2(OH)•4(H2O) Pcca 2/m 2/m 2/m
 
08.DH.20 Segelerite CaMgFe(PO4)2(OH)•4(H2O) Pcca 2/m 2/m 2/m
 
08.DH.20 Wilhelmvierlingite CaMnFe(PO4)2(OH)•2(H2O) P bca 2/m 2/m 2/m
 

Other Juonniite Information

Help on References: References: NAME( AmMin) PHYS. PROP.(Min.Mag.,Vol.61,p736,1997) OPTIC PROP.(AmMin)
Help on See Also: See Also: Links to other databases for Juonniite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Juonniite

CaMgSc(PO4)2(OH)•4(H2O)
Dana No: 42.11.01.07 Strunz No: 08.DH.20
Locality:

 

Notes:

 

 
   
 


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