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Magnesio-hornblende

Pictures (9 Images total)

Magnesiohornblende
Views (Image: 1241351526): 3590
Magnesiohornblende

Größe: 3,16 mm; Fundort: Nickenicher Sattel, Nickenich, Eifel, Rheinland-Pfalz, Deutschland

Copyright: Matteo Chinellato
Contribution: Hg 2009-05-03
Locality: Nickenicher Sattel (Eicher Sattel) / Nickenich / Pellenz, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Magnesiohornblende
Views (Image: 1241351626): 4917
Magnesiohornblende

Größe: 4,26 mm; Fundort: Nickenicher Sattel, Nickenich, Eifel, Rheinland-Pfalz, Deutschland

Copyright: Matteo Chinellato
Contribution: Hg 2009-05-03
Locality: Nickenicher Sattel (Eicher Sattel) / Nickenich / Pellenz, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Magnesiohornblende
Views (Image: 1304853172): 1917
Magnesiohornblende

Größe: 1,01 mm; Fundort: Montenero, Onano, Viterbo, Latium, Italien

Copyright: Matteo Chinellato
Contribution: Hg 2011-05-08
Locality: Montenero / Onano / Viterbo, Provinz / Latium (Lazio), Region / Italien
Magnesiohornblende
Views (Image: 1278152180): 3418, Rating: 6
Magnesiohornblende

Kristallgröße: 4 mm, Fundort: Neuer Steinbruch, Ercolano, Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien, Italien

Copyright: Dan Weinrich
Contribution: thdun5 2010-07-03
Locality: Neuer Steinbruch / Ercolano / Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Magnesiohornblende
Views (Image: 1306350526): 2008
Magnesiohornblende

Größe: 6,35 mm; Fundort: Montenero, Onano, Viterbo, Latium, Italien

Copyright: Matteo Chinellato
Contribution: Hg 2011-05-25
Locality: Montenero / Onano / Viterbo, Provinz / Latium (Lazio), Region / Italien
Magnesiohornblende
Views (Image: 1423781124): 733
Magnesiohornblende

Größe: 84x54x34 mm; Fundort: Valberg, Kragerø, Provinz Telemark, Norwegen

Copyright: Bob Griffis Minerals
Contribution: slugslayer 2015-02-12
Locality: Valberg / Kragerø / Vestfold og Telemark, Provinz / Norwegen

Collectors Summary

Color braun, grün, grünlich braun, grünlich schwarz, dunkelgrün
Streak color weiß
Hardness (Mohs) 5.5
Solubility ++ HF nur
Crystal System monoklin, C2/m

Additional information / Summary

Kalzium (Calcium) Amphibole
Kalzium (Calcium) Amphibole

Chemism

Chem­ical formula

☐Ca2(Mg4Al)(Si7Al)O22(OH)2

Chem­ical com­po­si­tion

Aluminium, Calcium, Magnesium, Silicium, Sauerstoff, Wasserstoff, Vakanz

Unit weight: 813.94104041 u; Number of atoms in the formula: 42

Info

Empirical formula:

VcCa2(Mg4Al)(Si7Al)O22(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Vacancy

Vc

0.00

1

2.38

0.0000000

0.0000000

Hydrogen

H

0.25

2

4.76

1.0079470

2.0158940

Oxygen

O

47.18

24

57.14

15.9994300

383.9863200

Magnesium

Mg

11.94

4

9.52

24.3050600

97.2202400

Aluminium

Al

6.63

2

4.76

26.9815382

53.9630764

Silicon

Si

24.15

7

16.67

28.0855300

196.5987100

Calcium

Ca

9.85

2

4.76

40.0784000

80.1568000

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.10-040

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

Clas­sifica­tion by Hölzel

9.DH.700

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
H: Amphiboles; Calcic Amphiboles
7: Hornblende-Group

Dana 8th edi­tion

66.01.03a.04

66: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2
01: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2 with P=2 amphibole configuration
03a: Group 2, the calcic amphiboles

IMA sta­tus

Neudefinition von der CNMNC anerkannt; CNMNC Newsletter No. 39, October 2017

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

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

Optical Properties

Color

braun, grün, grünlich braun, grünlich schwarz, dunkelgrün

Streak color

weiß

Diaphane­ity (Trans­parency)

durchscheinend bis opak

max. Birefrin­gence

0.021

Birefringence chart\! Magnesio-hornblende title=Birefringence chart Magnesio-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

1.645

RI value β

1.658

RI value γ / ε

1.666

Ri mean

1.656

2V angle

Biaxial (-) 67°~

Optical Data Luminescence

Color LW-UV (365nm)

 

grünlich blau

LW-UV Intensity

sehr schwach

After­glow (Per­sistant Lumi­nes­cence)

keine Daten

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell param­e­ters a (Å)

 9.830

Cell param­e­ters b (Å)

18.0659(11)

Cell param­e­ters c (Å)

5.2968(4)

Cell param­e­ters a/b or c/a

0.545

Cell param­e­ters c/b

0.293

Cell param­e­ters α

90°

Cell param­e­ters β

104.771(6)°

Cell param­e­ters γ

90°

Z

2

Kristall struc­ture

Amphibol-Supergruppe; Struktur bestimmt;

X-Ray Pow­der Diffrac­tion

8.412(74),
3.386(48),
3.121(72),
2.709(100),
2.596(45),
2.541(57),
2.338(41),
2.164(39)

XRD chart Magnesio-hornblende

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

5.5

VHN (Hard­ness Vick­ers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3 - 3.47 / Durchschnittlich = 3.23

Insta­bil­ity

++ HF nur

(Co-)Type locality

(Co-)Type locality

Namibia/ǁKaras, Region/ǃNamiǂNûs (Lüderitz), Kreis/Lüderitz/Sanddünen von Lüderitz

Type mate­r­ial

Das Typmaterial ist in den Sammlungen des Museo di Mineralogia, Sistema Museale di Ateneo, Universität Pavia, Italien, Katalognummer 2017-01, hinterlegt.

Preface

Author (Name, Year)

Roberta Oberti, Massimo Boiocchi, Frank C. Hawthorne und Marco E. Ciriotti (2018)

References

Canadian Mineralogist 35 (1997), 219

Ishida, K. and Hawthorne, F.C. Assignment of infrared OH-stretching bands in calcic amphiboles through deuteration and heat treatment. American Mineralogist: 91 (2006) 871-879.

Hawthorne, Frank C., and Roberta Oberti - On the classification of amphiboles: Canadian Mineralogist 44(1) (2006) 1-21.

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

Oberti, R., Boiocchi, M., Hawthorne, F.C. and Ciriotti, M.E. (2017) Magnesio-hornblende, IMA 2017-059. CNMNC Newsletter No. 39, October 2017, page 1284; Mineralogical Magazine, 81, 1279-1286.

R. Oberti, M. Boiocchi, F.C. Hawthorne, and M.E. Ciriotti: Magnesio-hornblende from Lüderitz, Namibia: mineral description and crystal chemistry. Mineralogical Magazine Vol. 82, Nr. 1 (2018) S. 145–157.

IMA group assignments



 
 
 
 
 
 

 
 
 
 
 
 
 

 
 
 
 
 
☐Ca2(Fe2+4Fe3+)(Si7Al)O22(OH)2
monoklin
C2/m

 
 
 
 
 
☐Ca2(Fe2+4Al)(Si7Al)O22(OH)2
monoklin
C2/m

 
 
 
 
 
☐Ca2(Mg4Fe3+)(Si7Al)O22F2
monoklin
C2/m

 
 
 
 
 
Ca2(Mg4Fe3+)[(Si7Al)O22](OH)2
monoklin
C2/m

 
 
 
 
 
☐Ca2(Mg4Al)(Si7Al)O22(OH)2
monoklin
C2/m

 
 
 
 
 
☐Ca2(Mg2Fe3+3)(Si7Al)O22O2
 
 

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Actuality: 23. May 2022 - 05:22:03

Other languages

German

Magnesio-Hornblende

English

Magnesio-hornblende

Spanish

Magnesiohornblenda

French

Magnesiohornblende

Russian

Магнезиогорнблендит

Japanese

マグネシウム角閃石

Alternative Name

Actinolitic hornblende

English

Gamisgradite

Tremolitic hornblende

CNMNC (IMA)-Number

IMA 2017-059

CNMNC symbol

Symbol

Mhbl

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

German pages

DeWikiPedia - search for: Magnesio-Hornblende
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English pages

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Russian pages

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