Mineralogy Database

Lunokite Mineral Data

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General Lunokite Information

Help on Chemical  Formula: Chemical Formula: (Mn,Ca)(Mg,Fe++,Mn)Al(PO4)2(OH)•4(H2O)
Help on Composition: Composition: Molecular Weight = 396.13 gm
   Calcium      2.02 %  Ca    2.83 % CaO
   Magnesium    2.45 %  Mg    4.07 % MgO
   Manganese   15.26 %  Mn   19.70 % MnO
   Aluminum     7.49 %  Al   14.16 % Al2O3
   Iron         2.82 %  Fe    3.63 % FeO
   Phosphorus  15.64 %  P    35.83 % P2O5
   Hydrogen     2.21 %  H    19.78 % H2O
   Oxygen      52.10 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+0.8Ca0.2Mg0.4Fe2+0.2Mn2+0.3Al1.1(PO4)2(OH)1.1�3.8(H2O)
Help on Environment: Environment: In fractures and on crusts of mitridatite in granite pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: On Mt. Vasin-Myl'k, Voron'i massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the Lun'ok River, nearby Mt. Vasin-Myl'k, Russia.
Help on Synonym: Synonym: Lun'okite
 

Lunokite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.799:1:0.3719
Help on Cell Dimensions: Cell Dimensions: a = 14.95, b = 18.71, c = 6.96, Z = 8; V = 1,946.81 Den(Calc)= 2.70
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): 2.809(1), 9.39(0.9), 2.92(0.7),
 

Physical Properties of Lunokite

Help on Cleavage: Cleavage: {010} Perfect, {001} Imperfect
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.66
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Lunokite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.032 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2256,KPDmeas= 0.2289,KC= 0.2219
Ncalc = 1.59 - 1.6
Help on Optical Data: Optical Data: Biaxial (+), a=1.603, b=1.608, g=1.616, bire=0.0130, 2V(Calc)=78, 2V(Meas)=70. Dispersion r > v.
 

Calculated Properties of Lunokite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.70 gm/cc
note: Specific Gravity of Lunokite =2.70 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.003332756
Boson Index = 0.996667244
Help on Photoelectric: Photoelectric: PELunokite = 5.92 barns/electron
U=PELunokite x rElectron Density= 15.96 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lunokite is Not Radioactive
 

Lunokite Classification

Help on  Dana Class: Dana Class: 42.11.01.04 (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.30 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DH -With large and medium-sized cations, (OH, etc.):RO4 < 1:1
 
08.DH.30 Arseniosiderite Ca2Fe3(AsO4)3O2•3(H2O) A2/a 2/m
 
08.DH.30 Pararobertsite Ca2Mn3(PO4)3O2•3(H2O) P 21/c 2/m
 
08.DH.30 Kolfanite Ca2Fe3O2(AsO4)3•2(H2O) A2/a 2/m
 
08.DH.30 Lunokite (Mn,Ca)(Mg,Fe,Mn)Al(PO4)2(OH)•4(H2O) P bca 2/m 2/m 2/m
 
08.DH.30 Robertsite Ca6Mn9(PO4)9O6(H2O)6•3(H2O) A2/a 2/m
 
08.DH.30 Mitridatite Ca2Fe3(PO4)3O2•3(H2O) A2/a 2/m
 
08.DH.30 Sailaufite! Ca2Mn3O2(AsO4)2(CO3)•3(H2O) Cm m
 

Other Lunokite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(AntBidBlaNic4) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Lunokite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Print or Cut-and-Paste your Lunokite Specimen Label here :

Lunokite

(Mn,Ca)(Mg,Fe++,Mn)Al(PO4)2(OH)•4(H2O)
Dana No: 42.11.01.04 Strunz No: 08.DH.30
Locality:

 

Notes:

 

 
   
 


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