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Segelerite Mineral Data

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General Segelerite Information

Help on Chemical  Formula: Chemical Formula: CaMgFe+++(PO4)2(OH)•4(H2O)
Help on Composition: Composition: Molecular Weight = 399.24 gm
   Calcium     10.04 %  Ca   14.05 % CaO
   Magnesium    6.09 %  Mg   10.10 % MgO
   Iron        13.99 %  Fe   20.00 % Fe2O3
   Phosphorus  15.52 %  P    35.55 % P2O5
   Hydrogen     2.27 %  H    20.31 % H2O
   Oxygen      52.10 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaMgFe3+(PO4)2(OH)•4(H2O)
Help on Environment: Environment: Grainitc pegmatites. Fe analog of overite.
Help on IMA Status: IMA Status: Approved IMA 1974
Help on Locality: Locality: Tip Top pegmatite, near Custer, Custer County, South Dakota, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Curt G. Segeler (1901-1989), amateur mineralogist, New York City.
Help on Name Pronunciation: Name Pronunciation: Segelerite + Pronunciation Say SEGELERITE
Help on Synonym: Synonym: ICSD 10407
  PDF 27-1061
 

Segelerite Image

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  Segelerite

Comments: Yellow, prismatic, striated crystal of Segelerite.
Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Segelerite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7906:1:0.3896
Help on Cell Dimensions: Cell Dimensions: a = 14.826, b = 18.751, c = 7.307, Z = 8; V = 2,031.36 Den(Calc)= 2.61
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pcca
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.828(1), 9.31(0.9), 5.34(0.6),
 

Physical Properties of Segelerite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Green, Chartreuse, Colorless.
Help on Density: Density: 2.67
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: white
 

Optical Properties of Segelerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.037 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.015 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.243,KPDmeas= 0.2376,KC= 0.2468
Ncalc = 1.64 - 1.66
Help on Optical Data: Optical Data: Biaxial (-), a=1.618, b=1.635, g=1.65, bire=0.0320, 2V(Calc)=84, 2V(Meas)=45-70.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): yellow.
 

Calculated Properties of Segelerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.63 gm/cc
note: Specific Gravity of Segelerite =2.61 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0094423091
Boson Index = 0.9905576909
Help on Photoelectric: Photoelectric: PESegelerite = 6.20 barns/electron
U=PESegelerite x rElectron Density= 16.29 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Segelerite is Not Radioactive
 

Segelerite Classification

Help on  Dana Class: Dana Class: 42.11.01.02 (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 Segelerite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Segelerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Segelerite

CaMgFe+++(PO4)2(OH)•4(H2O)
Dana No: 42.11.01.02 Strunz No: 08.DH.20
Locality:

 

Notes:

 

 
   
 


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