Phosphophyllite Mineral Data

General Phosphophyllite Information

Chemical Formula:

Zn2(Fe++,Mn)(PO4)2•4(H2O)

Composition:

Molecular Weight = 448.40 gm

Manganese 3.06 % Mn 3.95 % MnO

Zinc 29.17 % Zn 36.30 % ZnO

Iron 9.34 % Fe 12.02 % FeO

Phosphorus 13.82 % P 31.66 % P₂O₅

Hydrogen 1.80 % H 16.07 % H₂O

Oxygen 42.82 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Zn₂Fe²⁺_0.75Mn²⁺_0.25(PO₄)₂•4(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1920

Locality:

Hagendorf, Waidhaus, Oberpfalz, Bayern (Bavaria), Germany Link to MinDat.org Location Data.

Name Origin:

Named after its chemical composition containing phosphorus and the Greek fyllon - meaning "leaf."

Name Pronunciation:

Phosphophyllite

Synonym:

ICSD 100078

PDF 29-1427

Phosphophyllite Image

Images:

Phosphophyllite

Comments: Transparent, blue crystal of phosphophyllite.
Location: Hagendorf, Bavaria, Germany. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Phosphophyllite Crystallography

Axial Ratios:

a:b:c =2.0403:1:2.076

Cell Dimensions:

a = 10.377, b = 5.086, c = 10.559, Z = 2; beta = 121.1° V = 477.18 Den(Calc)= 3.12

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 4.438(1), 8.86(0.85), 3.383(0.6),

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

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Physical Properties of Phosphophyllite

Cleavage:

{100} Perfect, {010} Distinct, {102} Distinct

Color:

Blue green, Colorless, Light green.

Density:

3.1

Diaphaneity:

Transparent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Phosphophyllite

Gladstone-Dale:

CI meas= 0.02 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.027 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.195,KPDmeas= 0.1962,KC= 0.2003
Ncalc = 1.62

Optical Data:

Biaxial (-), a=1.595, b=1.614, g=1.616, bire=0.0210, 2V(Calc)=34, 2V(Meas)=44.3.

Pleochroism (x):

colorless.

Pleochroism (y):

pale blue green.

Pleochroism (z):

pale blue green.

Calculated Properties of Phosphophyllite

Electron Density:

Bulk Density (Electron Density)=3.04 gm/cc
note: Specific Gravity of Phosphophyllite =3.10 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Phosphophyllite}= 18.48 barns/electron
U=PE_{Phosphophyllite} x rElectron Density= 56.16 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Phosphophyllite is Not Radioactive

Phosphophyllite Classification

Dana Class:

40.02.07.01 (40)Hydrated Phosphates, etc

(40.02)where A++ (B++)2 (XO4) ï¿½ x(H2O)

(40.02.07)Dana Group

40.02.07.01 Phosphophyllite Zn2(Fe,Mn)(PO4)2•4(H2O) P 2₁/c 2/m

Strunz Class:

08.CA.40 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CA -With small and large/medium cations

08.CA.40 Phosphophyllite Zn2(Fe,Mn)(PO4)2•4(H2O) P 2₁/c 2/m

Other Phosphophyllite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Phosphophyllite :
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 - WWW-MINCRYST

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

Phosphophyllite

Zn2(Fe++,Mn)(PO4)2•4(H2O)
Dana No: 40.02.07.01 Strunz No: 08.CA.40
Locality:

Notes:

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