Ferromerrillite Mineral Data (original) (raw)

General Ferromerrillite Information

Help on Chemical Formula: Chemical Formula:

Ca9NaFe(PO4)7

Help on Composition: Composition:

Molecular Weight = 1,095.41 gm

Sodium 1.09 % Na 1.47 % Na2O

Calcium 33.29 % Ca 46.59 % CaO

Magnesium 0.44 % Mg 0.74 % MgO

Manganese 0.35 % Mn 0.45 % MnO

Iron 4.13 % Fe 5.31 % FeO

Phosphorus 19.79 % P 45.35 % P2O5

Oxygen 40.90 % O

______ ______

100.00 % 99.91 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Ca9.1Na0.52Fe2+0.81Mg0.2Mn2+0.07(PO4)7

Help on Environment: Environment:

Whitlockite group.

Help on IMA Status: IMA Status:

Approved IMA 2006 (Dana # Added)

Help on Locality: Locality:

Shergotty meteorite, Gaya, Bihar, India. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named as the Fe analog of merrillite.

Help on Synonym: Synonym:

IMA2006-039

Merrillite-Fe

Ferromerrillite Image

Click Here for Larger Ferromerrillite Image in a New Browser Window Images:

Click Here for Larger Ferromerrillite Image Ferromerrillite Comments: Polished section grain mount of ferromerrillite with analysis.. Location: Meteorite Los Angeles, Shergotite, Martian basalt.Scale: See Image. © Diederik Visser

Ferromerrillite Crystallography

Help on Axial Ratios: Axial Ratios:

a:c = 1:3.58821

Help on Cell Dimensions: Cell Dimensions:

a = 10.372, c = 37.217, Z = 6; V = 3,467.35 Den(Calc)= 3.15

Help on Crystal System: Crystal System:

Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: R 3c

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.86(1), 3.19(0.6), 2.594(0.5),1.917(0.2), 2.747(0.2), 2.99(0.2), 6.42(0.2), 8.13(0.2),

Physical Properties of Ferromerrillite

Help on Habit: Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Optical Properties of Ferromerrillite

Help on Optical Data: Optical Data:

NCalc= 1.62 - from Gladstone-Dale relationship (KC = 0.196) where Ncalc=Dcalc*KC+1

Calculated Properties of Ferromerrillite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.12 gm/cc
note: Specific Gravity of Ferromerrillite =3.15 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0019650188
Boson Index = 0.9980349812

Help on Photoelectric: Photoelectric:

PEFerromerrillite = 6.38 barns/electron
U=PEFerromerrillite x rElectron Density= 19.90 barns/cc.

Help on Radioactivity: Radioactivity:

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

Ferromerrillite Classification

Help on Dana Class: Dana Class:

38.03.04.06 (38)Anhydrous Phosphates, etc

(38.03)(A+ B++)3 (XO4)2

(38.03.04)Whitlockite group

38.03.04.01 Whitlockite Ca9(Mg,Fe)(PO4)6(PO3OH) R 3c 3m

38.03.04.02 Strontiowhitlockite Sr7(Mg,Ca)3(PO4)6[PO3(OH)] R 3c 3m

38.03.04.03 Merrillite-(Ca)* (Ca,[])19Mg2(PO4)14 R 3c 3m

38.03.04.04 Merrillite Ca18Na2Mg2(PO4)14 R 3c 3m

38.03.04.05 Merrillite-(Y)* Ca16Y2Mg2(PO4)14 R 3c 3m

38.03.04.06 Ferromerrillite! Ca9NaFe(PO4)7 R 3c 3m

38.03.04.07 Tuite! Ca3(PO4)2 R 3m 3m

38.03.04.08 Bobdownsite! Ca9Mg(PO3F)(PO4)6 R 3c 3m

Help on Strunz Class: Strunz Class:

08.AC.45 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AC -With medium-sized and large cations

08.AC.45 Merrillite-(Ca)* (Ca,[])19Mg2(PO4)14 R 3c 3m

08.AC.45 Merrillite Ca18Na2Mg2(PO4)14 R 3c 3m

08.AC.45 Merrillite-(Y)* Ca16Y2Mg2(PO4)14 R 3c 3m

08.AC.45 Strontiowhitlockite Sr7(Mg,Ca)3(PO4)6[PO3(OH)] R 3c 3m

08.AC.45 Whitlockite Ca9(Mg,Fe)(PO4)6(PO3OH) R 3c 3m

08.AC.45 Ferromerrillite! Ca9NaFe(PO4)7 R 3c 3m

08.AC.45 Tuite! Ca3(PO4)2 R 3m 3m

08.AC.45 Bobdownsite! Ca9Mg(PO3F)(PO4)6 R 3c 3m

Other Ferromerrillite Information

Help on See Also: See Also:

Links to other databases for Ferromerrillite :
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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Print or Cut-and-Paste your Ferromerrillite Specimen Label here :

Ferromerrillite

Ca9NaFe(PO4)7
Dana No: 38.03.04.06 Strunz No: 08.AC.45
Locality:

Notes: