Heterosite Mineral Data

Heterosite Mineral Data +

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General Heterosite Information

Chemical Formula:

Fe+++PO4

Composition:

Molecular Weight = 150.82 gm

Iron 37.03 % Fe 52.94 % Fe₂O₃

Phosphorus 20.54 % P 47.06 % P₂O₅

Oxygen 42.43 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺(PO₄)

Environment:

Forms a series with the Mn+++ end-member Purpurite.

IMA Status:

Valid Species (Pre-IMA) 1826

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 2909

PDF 34-134

Heterosite Image

Images:

Heterosite Alluaudite

Comments: Purple crystalline heterosite with yellow coatings of alluaudite.
Location: Palermo Mine, North Groton, Grafton County, New Hampshire, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Heterosite Graftonite

Comments: Whitish graftonite intergrown with dark purple to brown heterosite.
Location: Grafton, Grafton County, New Hampshire, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Heterosite Crystallography

Axial Ratios:

a:b:c =0.5928:1:0.4872

Cell Dimensions:

a = 5.824, b = 9.823, c = 4.786, Z = 4; V = 273.80 Den(Calc)= 3.66

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmnb

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.452(1), 4.31(0.9), 3.46(0.85),

Crystal Structure:

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Eventoff W , Martin R , Peacor D R , American Mineralogist , 57 (1972) p.45-51, The crystal structure of heterosite

Physical Properties of Heterosite

Cleavage:

[100] Good, [010] Indistinct

Color:

Brownish black, Violet brown, Greenish brown, Dark brown, Dark pink.

Density:

3.409

Diaphaniety:

Subtranslucent to Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Hardness:

4-4.5 - Between Fluorite and Apatite

Luster:

Silky

Streak:

brown red

Optical Properties of Heterosite

Gladstone-Dale:

CI meas= -0.029 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2423,KPDmeas= 0.2601,KC= 0.2529

Optical Data:

Biaxial (+), a=1.86, b=1.89, g=1.91, bire=0.0500

Calculated Properties of Heterosite

Electron Density:

r_electron=3.30 gm/cc
note: r_Heterosite=3.41 gm/cc.

Fermion Index

Fermion Index = 0.00805
Boson Index = 0.99195

Photoelectric:

PE_Heterosite= 12.13 barns/electron
U=PE_Heterosite x r_electron= 40.03 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Heterosite is Not Radioactive

Heterosite Classification

Dana Class:

38.4.1.1 (38)Anhydrous Phosphates, etc

(38.4)A+ XO4

(38.4.1)Dana Group

38.4.1.1 Heterosite FePO4 Pmnb 2/m 2/m 2/m

38.4.1.2 Purpurite MnPO4 Pmnb 2/m 2/m 2/m

Strunz Class:

VII/A.02-50 VII - Phosphates, Arsenates and Vanadates

VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions. cations of medium size: Mostly Fe, Mn

VII/A.02 - Simferrite - Natrophilite series

VII/A.02-05 Simferite Li(Mg,Fe,Mn)2(PO4)2 Pbnm,Pbn21 Ortho

VII/A.02-10 Triphylite LiFePO4 Pbnm 2/m 2/m 2/m

VII/A.02-20 Lithiophilite LiMnPO4 Pmnb 2/m 2/m 2/m

VII/A.02-30 Ferrisicklerite Li(Fe,Mn)PO4 Pmnb 2/m 2/m 2/m

VII/A.02-40 Sicklerite Li(Mn,Fe)PO4 Pmnb 2/m 2/m 2/m

VII/A.02-50 Heterosite FePO4 Pmnb 2/m 2/m 2/m

VII/A.02-60 Purpurite MnPO4 Pmnb 2/m 2/m 2/m

VII/A.02-70 Maricite NaFePO4 Pmnb 2/m 2/m 2/m

VII/A.02-80 Natrophilite NaMnPO4 Pnam 2/m 2/m 2/m

Other Heterosite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Heterosite

Fe+++PO4
Dana No: 38.4.1.1 Strunz No: VII/A.02-50
Locality:

Notes: