Schaferite Mineral Data + Say SCHAFERITE


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General Schaferite Information

Help on Chemical  Formula: Chemical Formula: NaCa2Mg2(VO4)3
Help on Composition: Composition: Molecular Weight = 496.57 gm
   Sodium      4.63 %  Na    6.24 % Na2O
   Calcium    16.14 %  Ca   22.59 % CaO
   Magnesium   9.79 %  Mg   16.23 % MgO
   Vanadium   30.78 %  V    54.94 % V2O5
   Oxygen     38.66 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaCa2Mg2(VO4)3
Help on Environment: Environment: Found in a silicate-rich xenolith in leucite tephrite lava. The magnesium dominant analogue of palenzonaite. A member of the Garnet group.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: Bellberg volcano, near Mayen, Laacher See district, Eifel, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Helmut Schäfer (b. 1931), amateur mineralogist from Mayen-Kürrenberg, specialist in the minerals of the Eifel volcanic area, who discovered the mineral.
Help on Synonym: Synonym: IMA1997-048
 

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Schaferite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 12.427, Z = 8; V = 1,919.11 Den(Calc)= 3.44
Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: I a3d
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.779(1), 3.108(0.44), 1.662(0.4),
 

Physical Properties of Schaferite

Help on Cleavage: Cleavage: None
Help on Color: Color: Red, Orange red.
Help on Diaphaniety: Diaphaniety: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Octahedral Crystals - Occurs as octahedral shaped crystals.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: yellow
 

Optical Properties of Schaferite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.019 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2733,KC= 0.2786
Help on Optical Data: Optical Data: Isotropic, n=1.94.
 

Calculated Properties of Schaferite

Help on Electron Density: Electron Density:

relectron=3.33 gm/cc
note: rSchaferite =3.44 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01096
Boson Index = 0.98904
Help on Photoelectric: Photoelectric:

PESchaferite = 8.18 barns/electron
U=PESchaferite x relectron= 27.21 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Schaferite is Not Radioactive

 

Schaferite Classification

Help on  Dana Class: Dana Class: 38.2.1.4 (38)Anhydrous Phosphates, etc
  (38.2)(A+ B++)5 (XO4)3
  (38.2.1)Dana Group
 
38.2.1.1 Berzeliite (Ca,Na)3(Mg,Mn)2(AsO4)3 I a3d 4/m 3 2/m
 
38.2.1.2 Manganberzeliite (Ca,Na)3(Mn,Mg)2(AsO4)3 I a3d 4/m 3 2/m
 
38.2.1.3 Palenzonaite (Ca,Na)3Mn(V,As,Si)3O12 I a3d 4/m 3 2/m
 
38.2.1.4 Schaferite ! NaCa2Mg2(VO4)3 I a3d 4/m 3 2/m
Help on  Strunz Class: Strunz Class: VII/A.08-45 VII - Phosphates, Arsenates and Vanadates
  VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of medium and big size: Mg, Mn,Fe, Cu, Zn, and Ca, Na
  VII/A.08 - Chladniite - Berzeliite - Palenzonaite series
 
VII/A.08-03 Galileiite! NaFe4(PO4)3 R 3 3
 
VII/A.08-05 Chladniite Na2Ca(Mg,Fe)7(PO4)6 R 3 3
 
VII/A.08-10 Johnsomervilleite Na2Ca(Mg,Fe,Mn)7(PO4)6 R 3 3
 
VII/A.08-20 Fillowite Na2Ca(Mn,Fe)7(PO4)6 R 3 3
 
VII/A.08-30 Berzeliite (Ca,Na)3(Mg,Mn)2(AsO4)3 I a3d 4/m 3 2/m
 
VII/A.08-40 Manganberzeliite (Ca,Na)3(Mn,Mg)2(AsO4)3 I a3d 4/m 3 2/m
 
VII/A.08-45 Schaferite NaCa2Mg2(VO4)3 I a3d 4/m 3 2/m
 
VII/A.08-50 Palenzonaite (Ca,Na)3Mn(V,As,Si)3O12 I a3d 4/m 3 2/m
 

Other Schaferite Information

Help on References: References: NAME( CanMin, 8/99) PHYS. PROP.(AmMin, V 84, p 1687) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Schaferite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Schaferite

NaCa2Mg2(VO4)3
Dana No: 38.2.1.4 Strunz No: VII/A.08-45
Locality:

 

Notes:

 

 
   
 
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