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Parvo-manganotremolite

Collectors Summary

Color sehr schwach violettbraun
Cleavages gut (110)
Fracture uneben
Crystal System monoklin, C2/m

Additional information / Summary

Die 2012 herausgebrachte Nomenklatur der Amphibole klassifiziert die Amphibole auf der Grundlage der dominierende Element in jeder Position, sofern nicht anders erforderlich, um die Formel auszubalanzieren. Parvo-Manganotremolit das mit (CaMn2+) in der B-Position definiert ist, wird damit diskreditiert. In der von Oberti et.al. (2006) angegebenen empirischen Formel qualifiziert sich dieses Material als Mn-reichen Tremolit.

Chemism

Chem­ical formula

A☐B(CaMn)Σ2CMg5TSi8O22(OH)2

Addi­tional chem. informa­tion

Amphibol Gruppe

Chem­ical com­po­si­tion

Calcium, Magnesium, Mangan, Silicium, Bor, Kohlenstoff, Sauerstoff, Wasserstoff, Vakanz

Unit weight: 839.23898391 u; Number of atoms in the formula: 43

Info

Empirical formula:

Vc(CaMn)CMg5TSi8O22(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Vacancy

Vc

0.00

1

2.33

0.0000000

0.0000000
Hydrogen

H

0.24

2

4.65

1.0079470

2.0158940
Carbon

C

1.43

1

2.33

12.0107800

12.0107800
Oxygen

O

45.75

24

55.81

15.9994300

383.9863200
Magnesium

Mg

14.48

5

11.63

24.3050600

121.5253000
Silicon

Si

26.77

8

18.60

28.0855300

224.6842400
Calcium

Ca

4.78

1

2.33

40.0784000

40.0784000
Manganese

Mn

6.55

1

2.33

54.9380499

54.9380499

Anal­y­sis wt%

SiO2 : 52.46, Al2O3 : 3.21, MgO : 21.99, MnO : 8.50, CaO : 7.38, Na2O : 1.73, H2O : 2.09 (Ref: American Mineralogist 2006)

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.10-005

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

Clas­sifica­tion by Hölzel

9.DH.160

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

Dana 8th edi­tion

66.01.03b.21

66: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2
01: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2 with P=2 amphibole configuration
03b: Group 3, the sodic-calcic amphiboles

IMA sta­tus

anerkannt 2004, diskreditiert 2012

Min­eral sta­tus

Varietät

Var­i­ety / poly­type of

Tremolite

Optical Properties

Color

sehr schwach violettbraun

max. Birefrin­gence

0.022
Birefringence chart\! Parvo-manganotremolite title=Birefringence chart Parvo-manganotremolite

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

1.620

RI value β

1.632

RI value γ / ε

1.642

Ri mean

1.631

2V angle

Biaxial (-) 85°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell param­e­ters a (Å)

9.7807

Cell param­e­ters b (Å)

18.0548

Cell param­e­ters c (Å)

5.2928

Cell param­e­ters a/b or c/a

0.542

Cell param­e­ters c/b

0.293

Cell param­e­ters α

90°

Cell param­e­ters β

104.19°

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

906.13

X-Ray Pow­der Diffrac­tion

9.027(54), 8.395(62), 3.395(62), 3.269(56), 3.113(80), 2.950(51), 2.713(100), 2.531(59)
XRD chart Parvo-manganotremolite

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

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

3.08 (berechnet)

3.076 ( ρ calc. Mineralienatlas )

Cleav­ages

gut (110)

Frac­ture

uneben

Tenac­ity

spröde

(Co-)Type locality

(Co-)Type locality

USA/New York/St. Lawrence Co./Fowler/Arnold Mine

Preface

Author (Name, Year)

Oberti & Cámara & Della Ventura & Iezzi & Benimoff, 2006

References

Oberti, R., Cámara, F., Della Ventura, G., Iezzi, G., Benimoff, A.I. (2006): "Parvo-mangano-edenite, parvo-manganotremolite und die solide Lösung zwischen Ca und Mn2+ auf der M4 Seite", American Mineralogist: 91: 526-532 (in englisch)

Hawthorne, Frank C., and Roberta Oberti (2006), Über die Klassifizierung der Amphibole: Canadian Mineralogist: 44(1): 1-21

2012 IMA Report: Nomenclature of the Amphibole Supergroup - American Mineralogist, 97 (2012), 2031-2048

Other languages

German

Parvo-Manganotremolit

English

Parvo-manganotremolite

Alternative Name

English

Parvomanganotremolite

CNMNC (IMA)-Number

IMA 2004-045

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

German pages

 DeWikiPedia - search for: Parvo-Manganotremolit
Google-Bilder-Suche - search for: Parvo-Manganotremolit
Mineralienatlas.de (Forum) - search for: Parvo-Manganotremolit

English pages

 Mindat - search for: Parvo-manganotremolite
Webmineral - search for:Parvo-manganotremolite
Handbook-of-Mineralogy - search for: Parvo-manganotremolite
RRUFF - Raman, XRD and other mineral data - search for: Parvo-manganotremolite
RRUFF - References and PDF downloads - search for: Parvo-manganotremolite
American-Mineralogist-Crystal-Structure-Database - search for: Parvo-manganotremolite
Strahlen.org - search for: Parvo-manganotremolite

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Parvo-Manganotremolit
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Edelsteine Neuburg - Gundolf Fischer - search for: Parvo-Manganotremolit

Locations with GPS information