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Magnesio-ferri-hornblende

Collectors Summary

Hardness (Mohs) ca. 5
Crystal System monoklin, C2/m

Chemism

Chemical formula

Ca2(Mg4Fe3+)[(Si7Al)O22](OH)2

Empirical formula (analysis)

A(☐0.62Na0.23K0.15)Σ1.00B(Ca1.76Na0.21Mn0.02Sr0.01)Σ2.00C(Mg2.79Ti0.17Al0.16Mn0.03)Σ5.00T(Si6.94Al1.06)Σ8.00O22W(OH1.96Cl0.04)Σ2.00

Chemical composition

Aluminium, Calcium, Eisen, Magnesium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 765.3015152132 u; Number of atoms in the formula: 39.15

Info

Empirical formula:

(Vc0.62Na0.23K0.15)(Ca1.76Na0.21Mn0.02Sr0.01)(Mg2.79Ti0.17Al0.16Mn0.03)(Si6.94Al1.06)O22(OH1.96Cl0.04)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Vacancy

Vc

0.00

0.62

1.58

0.0000000

0.0000000
Hydrogen

H

0.26

1.96

5.01

1.0079470

1.9755761
Oxygen

O

48.08

23

58.75

15.9994300

367.9868900
Sodium

Na

1.32

0.44

1.12

22.9897702

10.1154989
Magnesium

Mg

8.86

2.79

7.13

24.3050600

67.8111174
Aluminium

Al

4.30

1.22

3.12

26.9815382

32.9174766
Silicon

Si

25.47

6.94

17.73

28.0855300

194.9135782
Chlorine

Cl

0.19

0.04

0.10

35.4532000

1.4181280
Potassium

K

0.77

0.15

0.38

39.0983100

5.8647465
Calcium

Ca

9.22

1.76

4.50

40.0784000

70.5379840
Titanium

Ti

1.06

0.17

0.43

47.8671000

8.1374070
Manganese

Mn

0.36

0.05

0.13

54.9380499

2.7469025
Strontium

Sr

0.11

0.01

0.03

87.6210000

0.8762100

Analysis wt%

SiO2 47.37, TiO2 1.51, Al2O3 7.07, Fe2O3 3.86, FeO 11.62, MgO 12.77, CaO 11.22, SrO 0.15, MnO 0.39, Na2O 1.54, K2O 0.78, Cl 0.15, F 0, H2O calc 2.01, Cl≡O –0.03, sum 100.41 wt%

IMA status

anerkannt - CNMNC Newsletter 66, Februar 2022 - März 2022

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

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

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

9.8620(3)

Cell parameters b (Å)

18.1060(5)

Cell parameters c (Å)

5.3081(1)

Cell parameters a/b or c/a

0.545

Cell parameters c/b

0.293

Cell parameters α

90°

Cell parameters β

104.848(1)°

Cell parameters γ

90°

Z

2

Volume (ų)

916.173

Crystal structure

Amphibol-Supergruppe; Struktur ermittelt

X-Ray Powder Diffraction

8.397(52), 3.383(41), 2.717(100), 2.597(84), 2.545(61), 1.854(49), 1.585(39), 1.519(62)
XRD chart Magnesio-ferri-hornblende

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

Physical Properties

Hardness (Mohs)

ca. 5

VHN (Hardness Vickers)

389–448 kg/mm2 (VHN load in 100 g)

Density (g/cm³)

3.275(6) gemessen 3.204 berechnet

2.774 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

China/Xinjiang, Provinz/Bortala, Autonomer Bezirk/Jinghe, Kreis/Magnesio-ferri-hornblende Fundstelle

Type material

Das Typmaterial ist in den mineralogischen Sammlungen des Geologischen Museums von China, Nr. 16, Yangrou Hutong, Xisi, Peking 100031, Volksrepublik China, hinterlegt, Katalognummer M16131

Preface

Author (Name, Year)

Yongmei Zhang, Xuexiang Gu, Ting Li, Guang Fan, Yingshuai Zhang, und Jialin Wang (2024)

References

Frank C. Hawthorne, Roberta Oberti, George E. Harlow, Walter V. Maresch, Robert F. Martin, John C. Schumacer, Mark D. Welch - Nomenclature of the amphibole supergroup, American Mineralogist, Volume 97 (2012), pages 2031–2048

Zarubina, E.S., Aksenov, S.M., Chukanov, N.V., Rastsvetaeva, R.K. - Crystal Structure of Magnesio-Ferri-Hornblendite ☐Ca2(Mg4Fe3+)[(Si7Al)O22](OH)2 as a Potentially New Mineral of the Amphibole Supergroup. Doklady Chemistry, 470 (2016), 245–251

Zhang, Y., Gu, X., Li, T., Fan, G., Zhang, Y., and Wang, J.: Magnesio-ferri-hornblende, IMA 2021-100, in: CNMNC Newsletter 66, Eur. J. Mineral., 34, https://doi.org/10.5194/ejm-34-253-2022, 2022.

Yongmei Zhang; Xuexiang Gu; Ting Li; Guang Fan; Yingshuai Zhang; Tao Wang; Jialin Wang: Magnesio-ferri-hornblende, ☐Ca2(Mg4Fe3+)[(Si7Al)O22](OH)2, a new member of the amphibole supergroup. American Mineralogist Vol. 109, Nr. 6 (2024) S. 1074-1084. doi: 10.2138/am-2023-8922

IMA group assignments

Other languages

German

Magnesio-Ferri-Hornblende

English

Magnesio-ferri-hornblende

Russian

Магнезиоферригорнблендит

CNMNC (IMA)-Number

IMA 2021-100

CNMNC symbol

Symbol

Mfhbl

Locations with GPS information

IDs

GUSID (Global unique identifier short form) RRdOZpEU10aplzBNCC7hfQ
GUID (Global unique identifier) 664E1745-1491-46D7-A997-304D082EE17D
Database ID 7911