Whiteite-(CaFeMg) Mineral Data
General Whiteite-(CaFeMg) Information
Chemical Formula:
Ca(Fe++,Mn++)Mg2Al2(PO4)4(OH)2•8(H2O)
Composition:
Molecular Weight = 756.29 gm
Calcium 5.30 % Ca 7.41 % CaO
Magnesium 6.43 % Mg 10.66 % MgO
Manganese 1.82 % Mn 2.34 % MnO
Aluminum 7.14 % Al 13.48 % Al2 O3
Iron 5.54 % Fe 7.12 % FeO
Phosphorus 16.38 % P 37.54 % P2 O5
Hydrogen 2.40 % H 21.44 % H2 O
Oxygen 55.00 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
CaFe2+ 0.75 Mn2+ 0.25 Mg2 Al2 (PO4 )4 (OH)2 �8(H2 O)
Environment:
Found in pegmatites.
IMA Status:
Approved IMA 1978
Locality:
Ilha de Taquaral, Minas Gerias, Brazil. Link to MinDat.org Location Data.
Name Origin:
Named for John S. White, Jr. (1933-), former editor of the Mineralogical Record and professional curator of minerals and gems.
Name Pronunciation:
Whiteite-(CaFeMg)
Whiteite-(CaFeMg) Image
Images:
Whiteite-(CaFeMg)
Comments: Blocky, beige-pink whiteite-(CaFeMg) crystals on matrix.
Location: Cross-cut Creek, Yukon Territory, Canada.
Scale: Crystal size 2x3x3.5 cm.
© Dave Barthelmy
Whiteite-(CaFeMg) Crystallography
Axial Ratios:
a:b:c =2.1346:1:1.4512
Cell Dimensions:
a = 14.9, b = 6.98, c = 10.13, Z = 2; beta = 113.12° V = 968.92 Den(Calc)= 2.59
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21 /a
X Ray Diffraction:
By Intensity(I/Io ): 9.27(1), 2.781(0.8), 2.941(0.7),
Physical Properties of Whiteite-(CaFeMg)
Cleavage:
{???} Perfect
Color:
Yellow, Yellow brown.
Density:
2.58
Diaphaneity:
Transparent
Habit:
Aggregates - Made of numerous individual crystals or clusters.
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
4 - Fluorite
Luster:
Vitreous - Dull
Streak:
white
Optical Properties of Whiteite-(CaFeMg)
Gladstone-Dale:
CI meas = -0.01 (Superior) - where the CI = (1-KPDmeas /KC ) CI calc = -0.007 (Superior) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2259,KPDmeas = 0.2267,KC = 0.2244 Ncalc = 1.58
Optical Data:
Biaxial (+), a=1.58, b=1.585, g=1.59, bire=0.0100, 2V(Calc)=88, 2V(Meas)=40-50.
Calculated Properties of Whiteite-(CaFeMg)
Electron Density:
Bulk Density (Electron Density)=2.61 gm/cc note: Specific Gravity of Whiteite-(CaFeMg) =2.59 gm/cc.
Fermion Index:
Fermion Index = 0.0079406591 Boson Index = 0.9920593409
Photoelectric:
PEWhiteite-(CaFeMg) = 3.87 barns/electronU=PEWhiteite-(CaFeMg) x r Electron Density= 10.12 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Whiteite-(CaFeMg) is Not Radioactive
Whiteite-(CaFeMg) Classification
Dana Class:
42.11.03.01 (42) Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
(42.11) where (AB)4 (XO4)3 Zq � x(H2O)
(42.11.03) Whiteite Group
42.11.03.01 Whiteite-(CaFeMg) Ca(Fe,Mn)Mg2Al2(PO4)4(OH)2•8(H2O) P 21 /a 2/m
42.11.03.02 Whiteite-(MnFeMg) (Mn,Ca)(Fe,Mn)Mg2Al2(PO4)4(OH)2•8(H2O) P 2/a 2/m
42.11.03.03 Whiteite-(CaMnMg) CaMnMg2Al2(PO4)4(OH)2•8(H2O) P 2/a 2/m
42.11.03.04 Rittmannite MnMnFeAl2(OH)2(PO4)4•8(H2O) P 2/a 2/m
42.11.03.05 Jahnsite-(CaFeFe) ! (Ca,Mn)(Fe,Mn)Fe2Fe2(PO4)4(OH)2•8(H2O) P 2/a 2/m
42.11.03.06 Jahnsite-(NaFeMg) ! NaFeMg2Fe2(PO4)4(OH)2•8H2O P 2/a 2/m
42.11.03.07 Jahnsite-(CaMgMg) ! CaMgMg2Fe2(PO4)4(OH)2•8H2O P 2/a 2/m
42.11.03.08 Jahnsite-(NaMnMg) ! NaMnMg2Fe2(PO4)4(OH)2•8H2O P 2/a 2/m
Strunz Class:
08.DH.15 08 - PHOSPHATES, ARSENATES, VANADATES
08.D - Phosphates, etc
08.DH -With large and medium-sized cations, (OH, etc.):RO4 < 1:1
08.DH.15 Keckite Ca(Mn,Zn)2Fe3(PO4)4(OH)3•2(H2O) P 21 /a 2/m
08.DH.15 Jahnsite-(CaMnFe) CaMnFe2Fe2(PO4)4(OH)2•8(H2O) P 2/a 2/m
08.DH.15 Jahnsite-(CaMnMg) CaMnMg2Fe2(PO4)4(OH)2•8(H2O) P 2/a 2/m
08.DH.15 Jahnsite-(CaMnMn) CaMnMn2Fe2(PO4)4(OH)2•8(H2O) P 2/a 2/m
08.DH.15 Jahnsite-(MnMnMn) * MnMnMn2Fe2(PO4)4(OH)2•8(H2O) P 2/a 2/m
08.DH.15 Kaluginite * (Mn,Ca)MgFe(PO4)2(OH)•4(H2O) C cca 2/m 2/m 2/m
08.DH.15 Rittmannite MnMnFeAl2(OH)2(PO4)4•8(H2O) P 2/a 2/m
08.DH.15 Whiteite-(MnFeMg) (Mn,Ca)(Fe,Mn)Mg2Al2(PO4)4(OH)2•8(H2O) P 2/a 2/m
08.DH.15 Whiteite-(CaFeMg) Ca(Fe,Mn)Mg2Al2(PO4)4(OH)2•8(H2O) P 21 /a 2/m
08.DH.15 Whiteite-(CaMnMg) CaMnMg2Al2(PO4)4(OH)2•8(H2O) P 2/a 2/m
08.DH.15 Jahnsite-(CaFeFe) ! (Ca,Mn)(Fe,Mn)Fe2Fe2(PO4)4(OH)2•8(H2O) P 2/a 2/m
08.DH.15 Jahnsite-(NaFeMg) ! NaFeMg2Fe2(PO4)4(OH)2•8H2O P 2/a 2/m
08.DH.15 Jahnsite-(CaMgMg) ! CaMgMg2Fe2(PO4)4(OH)2•8H2O P 2/a 2/m
08.DH.15 Jahnsite-(NaMnMg) ! NaMnMg2Fe2(PO4)4(OH)2•8H2O P 2/a 2/m
Other Whiteite-(CaFeMg) Information
References:
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Whiteite-(CaFeMg) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Whiteite-(CaFeMg)
Ca(Fe++,Mn++)Mg2Al2(PO4)4(OH)2•8(H2O)
Dana No: 42.11.03.01 Strunz No: 08.DH.15
Locality:
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