Calcioferrite Mineral Data
General Calcioferrite Information
Chemical Formula:
Ca4Fe++(Fe+++,Al)4(PO4)6(OH)4•12(H2O)
Composition:
Molecular Weight = 1,233.18 gm
Calcium 13.00 % Ca 18.19 % CaO
Magnesium 1.97 % Mg 3.27 % MgO
Aluminum 2.19 % Al 4.13 % Al2 O3
Iron 13.59 % Fe 19.42 % Fe2 O3
Phosphorus 15.07 % P 34.53 % P2 O5
Hydrogen 2.29 % H 20.45 % H2 O
Oxygen 51.90 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
•12(H2 O)Ca4 MgFe3+ 3 Al(PO4 )6 (OH)4
Environment:
Found in a bed of Tertiary clay. The Fe-analog of montgomeryite.
IMA Status:
Valid Species (Pre-IMA) 1858
Locality:
Battenberg, Bavaria, Germany. Link to MinDat.org Location Data.
Name Origin:
Named for its composition.
Name Pronunciation:
Calcioferrite + Pronunciation
Calcioferrite Image
Images:
Calcioferrite Crystallography
Axial Ratios:
a:b:c =0.4272:1:0.2607
Cell Dimensions:
a = 10.34, b = 24.2, c = 6.31, Z = 2; beta = 91.5° V = 1,578.40 Den(Calc)= 2.59
Crystal System:
Monoclinic - Sphenoidal H-M Symbol (2) Space Group: C 2
X Ray Diffraction:
By Intensity(I/Io ): 12.1(1), 1.578(0.9), 2.59(0.9), 2.65(0.9), 2.9(0.9), 3.15(0.7), 5.17(0.6), 6.05(0.6),
Physical Properties of Calcioferrite
Cleavage:
{???} Perfect, {???} Very Good
Color:
Greenish yellow, Yellow, Yellow green, Yellowish white.
Density:
2.53
Diaphaneity:
Translucent to Opaque
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Foliated - Two dimensional platy forms.
Habit:
Reniform - "Kidney like" in shape (e.g.. hematite).
Hardness:
2.5 - Finger Nail
Luster:
Pearly
Streak:
yellowish white
Optical Properties of Calcioferrite
Gladstone-Dale:
CI meas = 0.076 (Fair) - where the CI = (1-KPDmeas /KC ) CI calc = 0.097 (Poor) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2232,KPDmeas = 0.2285,KC = 0.2472 Ncalc = 1.63 - 1.64
Optical Data:
Biaxial (-), a=1.572, b=1.579, g=1.583, bire=0.0110, 2V(Calc)=72, 2V(Meas)=75.
Calculated Properties of Calcioferrite
Electron Density:
Bulk Density (Electron Density)=2.55 gm/cc note: Specific Gravity of Calcioferrite =2.53 gm/cc.
Fermion Index:
Fermion Index = 0.0052792049 Boson Index = 0.9947207951
Photoelectric:
PECalcioferrite = 6.39 barns/electronU=PECalcioferrite x r Electron Density= 16.29 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Calcioferrite is Not Radioactive
Calcioferrite Classification
Dana Class:
42.11.08.03 (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 Calcioferrite Information
References:
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Calcioferrite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
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Calcioferrite
Ca4Fe++(Fe+++,Al)4(PO4)6(OH)4•12(H2O)
Dana No: 42.11.08.03 Strunz No: 08.DH.25
Locality:
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