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Ferromerrillite (IMA 2006-039)

Collectors Summary

Color farblos
Hardness (Mohs) ~5
Cleavages keine beobachtet
Crystal System trigonal, R3c

Chemism

Chem­ical formula

Ca9NaFe(PO4)7

Empir­ical formula (anal­y­sis)

Ca9.00(Na0.60Ca0.07)Σ0.67(Fe2+0.53Mg0.40)Σ0.93P7.08O28

Addi­tional chem. informa­tion

Fe2+-dominierendes Analog von Merrillit

Chem­ical com­po­si­tion

Calcium, Eisen, Natrium, Phosphor, Sauerstoff

Unit weight: 1083.903199416 u; Number of atoms in the formula: 45.68

Info

Empirical formula:

Ca9.00(Na0.60Ca0.07)(Fe0.53Mg0.40)P7.08O28

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

41.33

28

61.30

15.9994300

447.9840400

Sodium

Na

1.27

0.6

1.31

22.9897702

13.7938621

Magnesium

Mg

0.90

0.4

0.88

24.3050600

9.7220240

Phosphorus

P

20.23

7.08

15.50

30.9737612

219.2942293

Calcium

Ca

33.54

9.07

19.86

40.0784000

363.5110880

Iron

Fe

2.73

0.53

1.16

55.8452000

29.5979560

Anal­y­sis wt%

P2O5 : 44.99, FeO : 6.51, CaO : 45.70, Na2O : 2.81 (Ref: berechnet)

Strunz 9th edi­tion incl. updates

8.AC.45

8: Phosphate, Arsenate, Vanadate
A: Phosphate, etc., ohne weitere Anionen, ohne H2O
C: Mit mittelgroßen und großen [Kationen]
45:Whitlockit-Gruppe

Lapis Clas­sifica­tion

VII/A.05-048

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
A: Wasserfreie Phosphate [PO4] 3-, ohne fremde Anionen
5: Mittelgroße Kationen: Fe-Mn vorwiegend

Clas­sifica­tion by Hölzel

8.AC.306

8: PHOSPHATES ARSENATES VANADATES
A: Phosphates (-anions -water)
C: Phosphates, C medium + large
3: Whitlockite-Group

IMA sta­tus

anerkannt 12/2006

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Merrillite group

Optical Properties

Color

farblos

RI value α / ω / n

ω = 1.623(1)

RI value γ / ε

ε = 1.621(1)

2V angle

Uniaxial (-) zu unnormal Biaxial mit 2V bis zu (-)20°

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3m

Space Group number

161

Space Group

R3c

Cell param­e­ters a (Å)

10.372(2)

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

37.217(13)

Cell param­e­ters a/b or c/a

3.588

Cell param­e­ters c/b

-

Z

6

Volumne (ų)

3467.345

X-Ray Pow­der Diffrac­tion

8.13(2), 6.42(2), 3.19(6), 2.990(2), 2.860(10), 2.747(2), 2.594(5), 1.917(2)

XRD chart Ferromerrillite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Physical Properties

Hard­ness (Mohs)

~5

Density (g/cm³)

3.11 (berechnet)

3.114 ( ρ calc. Mineralienatlas )

Cleav­ages

keine beobachtet

(Co-)Type locality

(Co-)Type locality

Indien/Bihar/Gaya, Distrikt/Shergotty Mars-Meteorit

References

SERGEY N. BRITVIN, SERGEY V. KRIVOVICHEV, THOMAS ARMBRUSTER - Ferromerrillite, Ca9NaFe2+(PO4)7, a new mineral from the Martian meteorites, and some insights into merrillite–tuite transformation in shergottites - European Journal of Mineralogy [online: 14. Dezember 2015]

IMA group assignments

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

'Bobdownsite'

Ca9Mg(PO3F)(PO4)6

trigonal : 3m : R3c

8.AC.45

Ferromerrillite

Ca9NaFe(PO4)7

trigonal : 3m : R3c

8.AC.45

Merrillite

Ca9Na(Mg, Fe)(PO4)7

trigonal : 3m : R3c

8.AC.45

Strontiowhitlockite

Sr7(Mg,Ca)3(PO4)6[PO3(OH)]

trigonal : 3m : R3c

8.AC.45

Tuite

gamma-(Ca,Mg,Na)3[PO4]2

trigonal : 3m : R3m

8.AC.45

Whitlockite

Ca9(Mg,Fe2+)[PO3(OH)|(PO4)6]

trigonal : 3m : R3c

8.AC.45

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Farringtonite

Mg3(PO4)2

monoklin : 2/m : P21/n

VII/A.05-010

Stanfieldite

Ca4(Mg,Fe2+)5(PO4)6

monoklin : 2/m : C2/c

VII/A.05-020

Panethite

(Na,Ca,K)1-x(Mg,Fe2+,Mn)PO4

monoklin : 2/m : P21/n

VII/A.05-030

Brianite

Na2CaMg(PO4)2

monoklin : 2/m : P21/a

VII/A.05-040

Tuite

gamma-(Ca,Mg,Na)3[PO4]2

trigonal : 3m : R3m

VII/A.05-045

Ferromerrillite

Ca9NaFe(PO4)7

trigonal : 3m : R3c

VII/A.05-048

Wopmayite

Ca6Na3☐Mn(PO4)3(PO3OH)4

trigonal : 2m : R3c

VII/A.05-048

'Bobdownsite'

Ca9Mg(PO3F)(PO4)6

trigonal : 3m : R3c

VII/A.05-049

Whitlockite

Ca9(Mg,Fe2+)[PO3(OH)|(PO4)6]

trigonal : 3m : R3c

VII/A.05-050

Strontiowhitlockite

Sr7(Mg,Ca)3(PO4)6[PO3(OH)]

trigonal : 3m : R3c

VII/A.05-060

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Whitlockite

Ca9(Mg,Fe2+)[PO3(OH)|(PO4)6]

trigonal : 3m : R3c

8.AC.300

Merrillite

Ca9Na(Mg, Fe)(PO4)7

trigonal : 3m : R3c

8.AC.305

Ferromerrillite

Ca9NaFe(PO4)7

trigonal : 3m : R3c

8.AC.306

Wopmayite

Ca6Na3☐Mn(PO4)3(PO3OH)4

trigonal : 2m : R3c

8.AC.307

'Bobdownsite'

Ca9Mg(PO3F)(PO4)6

trigonal : 3m : R3c

8.AC.308

Strontiowhitlockite

Sr7(Mg,Ca)3(PO4)6[PO3(OH)]

trigonal : 3m : R3c

8.AC.310

Chladniite

Na2CaMg7(PO4)6

trigonal : 3 : R3

8.AC.320

Stornesite-(Y)

(Y,Ca)Na6(Ca,Na)8(Mg,Fe)43(PO4)36

trigonal : 3 : R3

8.AC.325

Fillowite

Na2Ca(Mn,Fe2+)7(PO4)6

trigonal : 3 : R3

8.AC.330

Johnsomervilleite

Na2Ca(Mg,Fe2+,Mn)7(PO4)6

8.AC.340

Galileiite

NaFe2+4(PO4)3

trigonal : 3 : R3

8.AC.350

Xenophyllite

Na4Fe7(PO4)6

triklin : 1, 1 : P1, P1

8.AC.370

Tuite

gamma-(Ca,Mg,Na)3[PO4]2

trigonal : 3m : R3m

8.AC.380

Other languages

German

Ferromerrillit

English

Ferromerrillite

Russian

Ферромерриллит

IMA Number

IMA 2006-039

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Ferromerrillit
Google-Bilder-Suche - search for: Ferromerrillit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Ferromerrillit

English pages

Mindat - search for: Ferromerrillite
Webmineral - search for:Ferromerrillite
Handbook-of-Mineralogy - search for: Ferromerrillite
RRUFF - Raman, XRD and other mineral data - search for: Ferromerrillite
RRUFF - References and PDF downloads - search for: Ferromerrillite
American-Mineralogist-Crystal-Structure-Database - search for: Ferromerrillite
Athena - search for: Ferromerrillite

Russian pages

Webmineral.ru - search for: Ферромерриллит

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Ferromerrillit
Bosse - search for: Ferromerrillit

Locations with GPS information




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