Zodacite Mineral Data

General Zodacite Information

Chemical Formula:

Ca4Mn++Fe+++4(PO4)6(OH)4•12(H2O)

Composition:

Molecular Weight = 1,292.68 gm

Calcium 12.40 % Ca 17.35 % CaO

Manganese 4.25 % Mn 5.49 % MnO

Iron 17.28 % Fe 24.71 % Fe₂O₃

Phosphorus 14.38 % P 32.94 % P₂O₅

Hydrogen 2.18 % H 19.51 % H₂O

Oxygen 49.51 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₄Mn²⁺Fe³⁺₄(PO₄)₆(OH)₄•12(H₂O)

IMA Status:

Approved IMA 1988

Locality:

Mangualde pegmatite, Beira, Portugal. Link to MinDat.org Location Data.

Name Origin:

Named for Peter Zodac (1894-1967), founder and editor of Rocks and Minerals.

Name Pronunciation:

Zodacite

Zodacite Image

Images:

Zodacite

Comments: SEM image of a divergent spray of zodacite crystals. (AmMin, v73:1179).
Location: Mangualde, Portugal. Scale: See Image.
© American Mineralogist

Zodacite Crystallography

Axial Ratios:

a:b:c =0.4205:1:0.2613

Cell Dimensions:

a = 10.152, b = 24.14, c = 6.308, Z = 2; beta = 91.14° V = 1,545.59 Den(Calc)= 2.78

Crystal System:

Monoclinic Space Group: C 2/c,Cc

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

By Intensity(I/I_o): 5.18(1), 12(0.6), 2.907(0.5),

Physical Properties of Zodacite

Cleavage:

{010} Good

Color:

Light yellow, Medium yellow, Colorless.

Density:

2.68

Diaphaneity:

Transparent

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

4 - Fluorite

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

yellow white

Optical Properties of Zodacite

Gladstone-Dale:

CI meas= 0.11 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.142 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2159,KPDmeas= 0.224,KC= 0.2517
Ncalc = 1.67 - 1.7

Optical Data:

Biaxial (-), a=1.598, b=1.601, g=1.602, bire=0.0040, 2V(Calc)=58, 2V(Meas)=83.

Pleochroism (x):

colorless.

Pleochroism (y):

very pale green.

Pleochroism (z):

pale green.

Calculated Properties of Zodacite

Electron Density:

Bulk Density (Electron Density)=2.68 gm/cc
note: Specific Gravity of Zodacite =2.68 gm/cc.

Fermion Index:

Fermion Index = 0.0040719072
Boson Index = 0.9959280928

Photoelectric:

PE_Zodacite= 8.34 barns/electron
U=PE_Zodacite x rElectron Density= 22.37 barns/cc.

Radioactivity:

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

Zodacite Classification

Dana Class:

42.11.08.04 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.11)where (AB)4 (XO4)3 Zq � x(H2O)

(42.11.08)Montgomeryite group

42.11.08.01 Montgomeryite Ca4MgAl4(PO4)6(OH)4•12(H2O) C 2/c 2/m

42.11.08.02 Kingsmountite (Ca,Mn)4(Fe,Mn)Al4(PO4)6(OH)4•12(H2O) C 2 2

42.11.08.03 Calcioferrite Ca4Fe(Fe,Al)4(PO4)6(OH)4•12(H2O) C 2 2

42.11.08.04 Zodacite Ca4MnFe4(PO4)6(OH)4•12(H2O) C 2/c,Cc Mono

42.11.08.05 Angastonite! CaMgAl2(PO4)2(OH)4?7H2O P1 1

Strunz Class:

08.DH.25 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DH -With large and medium-sized cations, (OH, etc.):RO4 < 1:1

08.DH.25 Calcioferrite Ca4Fe(Fe,Al)4(PO4)6(OH)4•12(H2O) C 2 2

08.DH.25 Kingsmountite (Ca,Mn)4(Fe,Mn)Al4(PO4)6(OH)4•12(H2O) C 2 2

08.DH.25 Montgomeryite Ca4MgAl4(PO4)6(OH)4•12(H2O) C 2/c 2/m

08.DH.25 Zodacite Ca4MnFe4(PO4)6(OH)4•12(H2O) C 2/c,Cc Mono

Other Zodacite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.73,p1179-1181,1988) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Zodacite :
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

Search for Zodacite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Zodacite :

Ask about Zodacite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

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

Zodacite

Ca4Mn++Fe+++4(PO4)6(OH)4•12(H2O)
Dana No: 42.11.08.04 Strunz No: 08.DH.25
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.