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Frondelite Mineral Data

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General Frondelite Information

Help on Chemical  Formula: Chemical Formula: Mn++Fe+++4(PO4)3(OH)5
Help on Composition: Composition: Molecular Weight = 648.28 gm
   Manganese    8.47 %  Mn   10.94 % MnO
   Iron        34.46 %  Fe   49.27 % Fe2O3
   Phosphorus  14.33 %  P    32.84 % P2O5
   Hydrogen     0.78 %  H     6.95 % H2O
   Oxygen      41.96 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+Fe3+4(PO4)3(OH)5
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1949
Help on Locality: Locality: Sapucaia pegmatite, Conselheiro Pe´┐Ża, Galileia, Minas Gerais, Brazil Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Clifford Frondel (1907-2002), one of the founders of Mineralogical Society of America and one of the authors of Dana's Mineralogy, 7th edition.
Help on Name Pronunciation: Name Pronunciation: Frondelite + Pronunciation Say FRONDELITE
 

Frondelite Image

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  Frondelite   Kidwellite

Comments: Root beer colored crystals of frondelite and white kidwellite sticks on matrix.
Location: Sapucaia, Minas Gerais, Brazil. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Frondelite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8138:1:0.3053
Help on Cell Dimensions: Cell Dimensions: a = 13.81, b = 16.968, c = 5.182, Z = 4; V = 1,214.29 Den(Calc)= 3.55
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Bbmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.191(1), 3.381(0.85), 3.615(0.4),
 

Physical Properties of Frondelite

Help on Cleavage: Cleavage: {100} Perfect, {010} Distinct, {001} Distinct
Help on Color: Color: Brown, Brown green, Brownish black, Green black, Dark green.
Help on Density: Density: 3.476
Help on Diaphaneity: Diaphaneity: Subtranslucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: brownish gray
 

Optical Properties of Frondelite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.031 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.051 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2472,KPDmeas= 0.2525,KC= 0.2605
Ncalc = 1.91 - 1.92
Help on Optical Data: Optical Data: Biaxial (-), a=1.86, b=1.88, g=1.893, bire=0.0330
 

Calculated Properties of Frondelite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.38 gm/cc
note: Specific Gravity of Frondelite =3.48 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0075078059
Boson Index = 0.9924921941
Help on Photoelectric: Photoelectric: PEFrondelite = 13.19 barns/electron
U=PEFrondelite x rElectron Density= 44.55 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Frondelite is Not Radioactive
 

Frondelite Classification

Help on  Dana Class: Dana Class: 41.09.02.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.09)where (A B)5 (XO4)3 Zq
  (41.09.02)Rockbridgeite Group
 
41.09.02.01 Rockbridgeite (Fe,Mn)Fe4(PO4)3(OH)5 Bbmm 2/m 2/m 2/m
 
41.09.02.02 Frondelite MnFe4(PO4)3(OH)5 Bbmm 2/m 2/m 2/m
 
41.09.02.03 Plimerite! ZnFe4(PO4)3(OH)5 C mcm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.BC.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BC -With only medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1
 
08.BC.10 Frondelite MnFe4(PO4)3(OH)5 Bbmm 2/m 2/m 2/m
 
08.BC.10 Rockbridgeite (Fe,Mn)Fe4(PO4)3(OH)5 Bbmm 2/m 2/m 2/m
 
08.BC.10 Plimerite! ZnFe4(PO4)3(OH)5 C mcm 2/m 2/m 2/m
 

Other Frondelite Information

Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Frondelite :
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

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Frondelite

Mn++Fe+++4(PO4)3(OH)5
Dana No: 41.09.02.02 Strunz No: 08.BC.10
Locality:

 

Notes:

 

 
   
 


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