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Parvo-mangano-edenite

Collectors Summary

Color sehr blass pink-braun
Lustre Glasglanz
Cleavages gut (110)
Fracture uneben
Crystal System monoklin, C2/m

Chemism

Chemical formula

Na(CaMn)Mg5(Si7Al)O22(OH)2

Additional chem. information

Amphibol-Supergruppe

Chemical composition

Aluminium, Calcium, Magnesium, Mangan, Natrium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 849.1139823 u; Number of atoms in the formula: 42

Info

Empirical formula:

Na(CaMn)Mg5(Si7Al)O22(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.24

2

4.76

1.0079470

2.0158940

Oxygen

O

45.22

24

57.14

15.9994300

383.9863200

Sodium

Na

2.71

1

2.38

22.9897702

22.9897702

Magnesium

Mg

14.31

5

11.90

24.3050600

121.5253000

Aluminium

Al

3.18

1

2.38

26.9815382

26.9815382

Silicon

Si

23.15

7

16.67

28.0855300

196.5987100

Calcium

Ca

4.72

1

2.38

40.0784000

40.0784000

Manganese

Mn

6.47

1

2.38

54.9380499

54.9380499

Analysis wt%

SiO2 : 49.33, Al2O3 : 6.24, FeO : 0.74, MgO : 21.14, MnO : 8.45, CaO : 8.30, Na2O : 2.65, H2O : 2.10 (Ref: American Mineralogist 2006)

Strunz 9th edition incl. updates

9.DE.15

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

Lapis Classification

VIII/F.10-085

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

Classification by Hölzel

9.DH.250

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

Dana 8th edition

66.01.03b.20

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

diskreditiert 2012

Mineral status

Mineralstatus fragwürdig

IMA Classification

IMA Classification

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

Optical Properties

Color

sehr blass pink-braun

Diaphaneity (Transparency)

durchscheinend

Lustre

Glasglanz

max. Birefringence

0.022

Birefringence chart\! Parvo-mangano-edenite title=Birefringence chart Parvo-mangano-edenite

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 (-) 84°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

9.795,

Cell parameters b (Å)

18.047

Cell parameters c (Å)

5.287

Cell parameters a/b or c/a

0.543

Cell parameters c/b

0.293

Cell parameters α

90°

Cell parameters β

104.28°

Cell parameters γ

90°

Z

2

Volumne (ų)

905.708

X-Ray Powder Diffraction

10.53(50), 3.39(59), 3.27(48), 3.12(61), 2.948(47), 2.720(46), 2.711(100), 2.594(49)

XRD chart Parvo-mangano-edenite

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

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

3.113 ( 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

American Mineralogist 91 (2006), 526

IMA group assignments

Other languages

German

Parvo-Mangano-Edenit

English

Parvo-mangano-edenite

Alternative Name

English

Parvomanganoedenite

CNMNC (IMA)-Number

IMA 2003-062

Locations with GPS information