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Ferromerrillite Mineral Data
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General Ferromerrillite Information
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Chemical Formula: |
Ca9NaFe(PO4)7 |
Composition: |
Molecular Weight = 1,095.41 gm |
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Sodium 1.09 % Na 1.47 % Na2O |
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Calcium 33.29 % Ca 46.59 % CaO |
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Magnesium 0.44 % Mg 0.74 % MgO |
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Manganese 0.35 % Mn 0.45 % MnO |
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Iron 4.13 % Fe 5.31 % FeO |
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Phosphorus 19.79 % P 45.35 % P2O5 |
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Oxygen 40.90 % O |
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______ ______ |
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100.00 % 99.91 % = TOTAL OXIDE |
Empirical Formula: |
Ca9.1Na0.52Fe2+0.81Mg0.2Mn2+0.07(PO4)7 |
Environment: |
Whitlockite group. |
IMA Status: |
Approved IMA 2006 (Dana # Added) |
Locality: |
Shergotty meteorite, Gaya, Bihar, India. Link to MinDat.org Location Data. |
Name Origin: |
Named as the Fe analog of merrillite. |
Synonym: |
IMA2006-039 |
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Merrillite-Fe |
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Ferromerrillite Image |
Images:
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Ferromerrillite
Comments: Polished section grain mount of ferromerrillite with analysis..
Location: Meteorite Los Angeles, Shergotite, Martian basalt.
Scale: See Image.
© Diederik Visser |
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Ferromerrillite Crystallography
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Axial Ratios: |
a:c = 1:3.58821 |
Cell Dimensions: |
a = 10.372, c = 37.217, Z = 6; V = 3,467.35 Den(Calc)= 3.15 |
Crystal System: |
Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3c |
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), |
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Physical Properties of Ferromerrillite
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Habit: |
Anhedral Grains - Granular minerals without the expression of crystal shapes |
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Optical Properties of Ferromerrillite
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Optical Data: |
NCalc= 1.62 - from Gladstone-Dale relationship (KC = 0.196) where Ncalc=Dcalc*KC+1 |
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Calculated Properties of Ferromerrillite
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Electron Density: |
Bulk Density (Electron Density)=3.12 gm/cc note: Specific Gravity of Ferromerrillite =3.15 gm/cc. |
Fermion Index: |
Fermion Index = 0.0019650188 Boson Index = 0.9980349812 |
Photoelectric: |
PEFerromerrillite = 6.38 barns/electron U=PEFerromerrillite x rElectron Density= 19.90 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Ferromerrillite is Not Radioactive |
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Ferromerrillite Classification
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Dana Class: |
38.03.04.06 (38)Anhydrous Phosphates, etc |
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(38.03)(A+ B++)3 (XO4)2 |
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(38.03.04)Whitlockite group |
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38.03.04.01 Whitlockite Ca9(Mg,Fe)(PO4)6(PO3OH) R 3c 3m |
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38.03.04.02 Strontiowhitlockite Sr7(Mg,Ca)3(PO4)6[PO3(OH)] R 3c 3m |
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38.03.04.03 Merrillite-(Ca)* (Ca,[])19Mg2(PO4)14 R 3c 3m |
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38.03.04.04 Merrillite Ca18Na2Mg2(PO4)14 R 3c 3m |
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38.03.04.05 Merrillite-(Y)* Ca16Y2Mg2(PO4)14 R 3c 3m |
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38.03.04.06 Ferromerrillite! Ca9NaFe(PO4)7 R 3c 3m |
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38.03.04.07 Tuite! Ca3(PO4)2 R 3m 3m |
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38.03.04.08 Bobdownsite! Ca9Mg(PO3F)(PO4)6 R 3c 3m |
Strunz Class: |
08.AC.45 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.A - Phosphates, etc. without additional anions, without H2O |
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08.AC -With medium-sized and large cations |
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08.AC.45 Merrillite-(Ca)* (Ca,[])19Mg2(PO4)14 R 3c 3m |
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08.AC.45 Merrillite Ca18Na2Mg2(PO4)14 R 3c 3m |
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08.AC.45 Merrillite-(Y)* Ca16Y2Mg2(PO4)14 R 3c 3m |
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08.AC.45 Strontiowhitlockite Sr7(Mg,Ca)3(PO4)6[PO3(OH)] R 3c 3m |
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08.AC.45 Whitlockite Ca9(Mg,Fe)(PO4)6(PO3OH) R 3c 3m |
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08.AC.45 Ferromerrillite! Ca9NaFe(PO4)7 R 3c 3m |
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08.AC.45 Tuite! Ca3(PO4)2 R 3m 3m |
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08.AC.45 Bobdownsite! Ca9Mg(PO3F)(PO4)6 R 3c 3m |
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Other Ferromerrillite Information
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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:
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