Whiteite-(CaFeMg) Mineral Data

[Mineral Forums] [Minerals for Sale] [About Us] [En Espanol] [Mineral Gallery]
Fabre Minerals - Europe's first Internet mineral dealer, on the web since 1996

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 % Al₂O₃

Iron 5.54 % Fe 7.12 % FeO

Phosphorus 16.38 % P 37.54 % P₂O₅

Hydrogen 2.40 % H 21.44 % H₂O

Oxygen 55.00 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaFe²⁺_0.75Mn²⁺_0.25Mg₂Al₂(PO₄)₄(OH)₂·8(H₂O)

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 - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 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:

PE_{Whiteite-(CaFeMg)}= 3.87 barns/electron
U=PE_{Whiteite-(CaFeMg)} x rElectron 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 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Whiteite-(CaFeMg) using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Whiteite-(CaFeMg) :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Whiteite-(CaFeMg) Mineral Data :

Ask about Whiteite-(CaFeMg) 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 Español

Print or Cut-and-Paste your Whiteite-(CaFeMg) Specimen Label here :

Whiteite-(CaFeMg)

Ca(Fe++,Mn++)Mg2Al2(PO4)4(OH)2•8(H2O)
Dana No: 42.11.03.01 Strunz No: 08.DH.15
Locality:

Notes: