https://www.mineraliengrosshandel.com
https://www.edelsteine-neuburg.de
https://www.mineralbox.biz
https://www.mineral-bosse.de
'._('einklappen').'
 

Ferromerrillite

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.05-046

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

Cerite supergroup  ⇒ 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

Volume (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

Other languages

German

Ferromerrillit

English

Ferromerrillite

Russian

Ферромерриллит

CNMNC (IMA)-Number

IMA 2006-039

CNMNC symbol

Symbol

Fmer

Locations with GPS information

IDs

GUSID (Global unique identifier short form) WTw04GN4NkC96d7yv3EXnw
GUID (Global unique identifier) E0343C59-7863-4036-BDE9-DEF2BF71179F
Database ID 4409