Mineralogy Database

Eosphorite Mineral Data

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General Eosphorite Information

Help on Chemical  Formula: Chemical Formula: MnAl(PO4)(OH)2•(H2O)
Help on Composition: Composition: Molecular Weight = 228.92 gm
   Manganese   24.00 %  Mn   30.99 % MnO
   Aluminum    11.79 %  Al   22.27 % Al2O3
   Phosphorus  13.53 %  P    31.00 % P2O5
   Hydrogen     1.76 %  H    15.74 % H2O
   Oxygen      48.92 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+Al(PO4)(OH)2•(H2O)
Help on Environment: Environment: Granitic pegmatite. Mn-end member of a series with childrenite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1878
Help on Locality: Locality: Branchville, Fairfield County, Connecticut, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek for "dawn-bearing," in allusion to the pink color.
Help on Name Pronunciation: Name Pronunciation: Eosphorite + Pronunciation Say EOSPHORITE
Help on Synonym: Synonym: ICSD 74292
  PDF 36-402
 

Eosphorite Image

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  Eosphorite   Zanazziite

Comments: Minor crystals of equant, olive green zanazziite and brown, lath-like crystals of eosphorite on quartz.
Location: Taquaral, Minas Gerais, Brazil. Scale: Picture size 1 cm.
© John Veevaert

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  Eosphorite   Vivianite

Comments: Bottle-green translucent vivianite crystal (2cm) associated with reddish, micro eosphorite crystals.
Location: Lavra do Énio pegmatite, Galiléia, Governador Valadares, Rio Doce, Minas Gerais, Brazil. Scale: 3.5 x 3 x 2 cm..
© Tom Loomis / Dakota Matrix

Eosphorite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7733:1:0.513
Help on Cell Dimensions: Cell Dimensions: a = 10.436, b = 13.495, c = 6.923, Z = 8; V = 974.99 Den(Calc)= 3.12
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Bbam
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.81(1), 2.42(0.4), 5.27(0.4),
Help on Forms: Forms:

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Forms: ( 1 2 1) ( 0 1 0) ( 1 1 1) ( 1 1 0) ( 1 0 0)

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Physical Properties of Eosphorite

Help on Cleavage: Cleavage: {100} Indistinct
Help on Color: Color: Light pink, Yellow brown, Light brown, Light yellow, Colorless.
Help on Density: Density: 3.06 - 3.1, Average = 3.08
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.
Help on Habit: Habit: Massive - Fibrous - Distinctly fibrous fine-grained forms.
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: 5 - Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: white
 

Optical Properties of Eosphorite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.027 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2087,KPDmeas= 0.2114,KC= 0.2174
Ncalc = 1.67 - 1.68
Help on Optical Data: Optical Data: Biaxial (-), a=1.628-1.639, b=1.648-1.664, g=1.657-1.671, bire=0.0290-0.0320, 2V(Calc)=54-66, 2V(Meas)=50. Dispersion strong, r < v.
Help on Pleochroism (x): Pleochroism (x): yellow.
Help on Pleochroism (y): Pleochroism (y): pink.
 

Calculated Properties of Eosphorite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.04 gm/cc
note: Specific Gravity of Eosphorite =3.08 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002374739
Boson Index = 0.9997625261
Help on Photoelectric: Photoelectric: PEEosphorite = 7.05 barns/electron
U=PEEosphorite x rElectron Density= 21.42 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Eosphorite is Not Radioactive
 

Eosphorite Classification

Help on  Dana Class: Dana Class: 42.07.01.02 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.07)where (AB)5 (XO4)3 Zq � x(H2O)
  (42.07.01)Childrenite Group
 
42.07.01.01 Childrenite FeAl(PO4)(OH)2•(H2O) Bba2 mm2
 
42.07.01.02 Eosphorite MnAl(PO4)(OH)2•(H2O) Bbam 2/m 2/m 2/m
 
42.07.01.03 Ernstite (Mn1-xFex)Al(PO4)(OH)2-xOx C 2/c or Cc Mono
 
42.07.01.04 Sinkankasite H2MnAl(PO4)2(OH)•6(H2O) P1 1
Help on  Strunz Class: Strunz Class: 08.DD.20 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DD -With only medium-sized cations, (OH, etc.):RO4 = 2:1
 
08.DD.20 Childrenite FeAl(PO4)(OH)2•(H2O) Bba2 mm2
 
08.DD.20 Eosphorite MnAl(PO4)(OH)2•(H2O) Bbam 2/m 2/m 2/m
 
08.DD.20 Ernstite (Mn1-xFex)Al(PO4)(OH)2-xOx C 2/c or Cc Mono
 

Other Eosphorite Information

Help on See Also: See Also: Links to other databases for Eosphorite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Scandinavian mineral gallery
17 - Tradeshop.com - The Rainbow of Gems
18 - WWW-MINCRYST
19 - theimage

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Eosphorite

MnAl(PO4)(OH)2•(H2O)
Dana No: 42.07.01.02 Strunz No: 08.DD.20
Locality:

 

Notes:

 

 


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