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Magnesio-ferri-fluoro-hornblende

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Magnesio-Ferri-Fluoro-Hornblende
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Magnesio-Ferri-Fluoro-Hornblende
Magnesio-Ferri-Fluoro-Hornblende BB ca.10 mm Italien/Sardinien (Sardegna), Region/Sud Sardegna, Provinz/Portoscuso (Portu de Scusi)/2,5km N von Portoscuso (Portu de Scusi)
Copyright: derhesse; Contribution: anatase2
Collection: anatase2
Location: Italien/Sardinien (Sardegna), Region/Sud Sardegna, Provinz/Portoscuso (Portu de Scusi)/2,5km N von Portoscuso (Portu de Scusi)
Mineral: Magnesio-ferri-fluoro-hornblende
Image: 1678707863
License: Usage for Mineralienatlas project only
Magnesio-Ferri-Fluoro-Hornblende

Magnesio-Ferri-Fluoro-Hornblende BB ca.10 mm Italien/Sardinien (Sardegna), Region/Sud Sardegna, Provinz/Portoscuso (Portu de Scusi)/2,5km N von Portoscuso (Portu de Scusi)
Collection: anatase2
Copyright: derhesse
Contribution: anatase2 2023-03-13
Locality: 2,5km N von Portoscuso (Portu de Scusi) / Portoscuso (Portu de Scusi) / Sud Sardegna, Provinz / Sardinien (Sardegna), Region / Italien

Collectors Summary

Crystal System monoklin, C2/m

Chemism

Chemical formula

☐Ca2(Mg4Fe3+)(Si7Al)O22F2

Empirical formula (analysis)

(Na0.15K0.22)Σ0.37 (Na0.25Ca1.66Mn0.09)Σ2.00 (Mg2.20Fe2+1.94Mn0.01Zn0.01Fe 3+0.72Ti0.13)Σ5.01 (Al1.11Si6.89)Σ8.00 O22[F1.55(OH)0.37Cl0.08)]Σ2.00

Chemical composition

Aluminium, Calcium, Eisen, Magnesium, Silicium, Fluor, Sauerstoff, Vakanz

Unit weight: 912.7404458995 u; Number of atoms in the formula: 39.75

Info

Empirical formula:

(Na0.15K0.22)(Na0.25Ca1.66Mn0.09)(Mg2.20Fe1.94Mn0.01Zn0.01Fe0.72Ti0.13)(Al1.11Si6.89)O22[F1.55(OH)0.37Cl0.08)]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.04

0.37

0.93

1.0079470

0.3729404
Oxygen

O

39.21

22.37

56.28

15.9994300

357.9072491
Fluorine

F

3.23

1.55

3.90

18.9984033

29.4475250
Sodium

Na

1.01

0.4

1.01

22.9897702

9.1959081
Magnesium

Mg

5.86

2.2

5.53

24.3050600

53.4711320
Aluminium

Al

3.28

1.11

2.79

26.9815382

29.9495074
Silicon

Si

21.20

6.89

17.33

28.0855300

193.5093017
Chlorine

Cl

0.31

0.08

0.20

35.4532000

2.8362560
Potassium

K

0.94

0.22

0.55

39.0983100

8.6016282
Calcium

Ca

7.29

1.66

4.18

40.0784000

66.5301440
Titanium

Ti

0.68

0.13

0.33

47.8671000

6.2227230
Manganese

Mn

0.60

0.1

0.25

54.9380499

5.4938050
Iron

Fe

16.27

2.66

6.69

55.8452000

148.5482320
Zinc

Zn

0.07

0.01

0.03

65.4094000

0.6540940

Analysis wt%

SiO2 : 45.34, Al2O3 : 6.18, TiO2 : 1.22, FeO : 15.24, Fe2O3 : 6.27, MgO : 9.71, MnO : 0.78, ZnO : 0.06, CaO : 10.18, Na2O : 1.35, K2O : 1.15, F : 3.22, Cl : 0.30, H2O calc : 0.37, Total : 99.95 wt.%

Strunz 9th edition incl. updates

9.DE.10

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
E: Ketten- und Bandsilikate mit 2-periodischen Doppelketten, Si4O11; Amphibol-Familie, Klinoamphibole
10:Amphibole: Ca

Lapis Classification

VIII/F.10-045

VIII: SILIKATE
F: Ketten- und Bandsilikate
10: Zweierbänder [Si4O11] 6-; Amphibol-Gruppe; Ca2-Amphibole

IMA status

anerkannt - CNMNC Newsletter No. 24, April 2015

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Amphibole supergroup  ⇒ (OH,F,Cl)-dominant amphiboles  ⇒ Calcium amphiboles  ⇒ Hornblende Amphibole

Optical Properties

max. Birefringence

0.009
Birefringence chart\! Magnesio-ferri-fluoro-hornblende title=Birefringence chart Magnesio-ferri-fluoro-hornblende

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

α = 1.669

RI value β

β = 1.676

RI value γ / ε

γ = 1.678

Ri mean

1.674

2V angle

Biaxial (-) 74(1)º (gemessen) 56º (berechnet)

Orientation

X ^ a = 47.6° (∠ stumpf), Y // b, Z ^ c = 33.4° (∠ spitz).

Pleochroism

In linear polarisiertem Licht ist Magnesio-Ferri-Fluor-Hornblende pleochroitisch, X = hellgrau (wenigsten), Y = dunkelgrau (die meisten), Z = blass braungrau (dazwischen)

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

9.839(5)

Cell parameters b (Å)

18.078(9)

Cell parameters c (Å)

5.319(3)

Cell parameters a/b or c/a

0.544

Cell parameters c/b

0.294

Cell parameters α

90°

Cell parameters β

104.99(3)º

Cell parameters γ

90°

Z

2

Volume (ų)

913.893

Crystal structure

Struktur bestimmt; Amphibol-Supergruppe

X-Ray Powder Diffraction

8.412(89), 3.389(55), 3.121(64), 2.738(34), 2.711(100), 2.599(45), 2.553(61), 2.164(36)
XRD chart Magnesio-ferri-fluoro-hornblende

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

Physical Properties

Density (g/cm³)

3.315 (berechnet)

3.317 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Italien/Sardinien (Sardegna), Region/Sud Sardegna, Provinz/Portoscuso (Portu de Scusi)/2,5km N von Portoscuso (Portu de Scusi)

Type material

Mineralogical Museum of the Dipartimento di Scienze della Terra e dell’Ambiente, University of Pavia, Italien

Collection number of type material

2014-01

Preface

Author (Name, Year)

Roberta Oberti, Massimo Boiocchi, Frank C. Hawthorne, Neil A. Ball and Luigi Chiappino (2015)

References

Oberti, R., Boiocchi, M., Hawthorne, F.C., Ball, N.A. and Chiappino, L. (2015) Magnesio-ferri-fluoro-hornblende, IMA 2014-091. CNMNC Newsletter No. 24, April 2015, page 248; Mineralogical Magazine, 79, 247-251.

Oberti, Roberta; Boiocchi, Massimo; Hawthorne, Frank C.; Ball, Neil A.; Chiappino, Luigi - Magnesio-ferri-fluoro-hornblende from Portoscuso, Sardinia, Italy: description of a newly approved member of the amphibole supergroup - Mineralogical Magazine [16. Dezember 2015]

IMA group assignments

Other languages

German

Magnesio-Ferri-Fluoro-Hornblende

English

Magnesio-ferri-fluoro-hornblende

Russian

Магнезиоферрифторгорнблендит

CNMNC (IMA)-Number

IMA 2014-091

CNMNC symbol

Symbol

Mffhbl

Locations with GPS information

IDs

GUSID (Global unique identifier short form) abXrcnwEiEOnq5-QSPb1Jg
GUID (Global unique identifier) 72EBB569-047C-4388-A7AB-9F9048F6F526
Database ID 7901