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Anandite

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Anandit
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Anandit
schwarze Kristalle von Anandit, Big Creek, Fresno Co, Kalifornien, USA; BB < 5 mm
Copyright: mintreasure.com; Contribution: openpit
Location: USA/Kalifornien (California)/Fresno Co./Big Creek
Mineral: Anandite
Image: 1678228049
License: Usage for Mineralienatlas project only
Anandit

schwarze Kristalle von Anandit, Big Creek, Fresno Co, Kalifornien, USA; BB < 5 mm
Copyright: mintreasure.com
Contribution: openpit 2023-03-07
Locality: Big Creek / Fresno Co. / Kalifornien (California) / USA

Collectors Summary

Color schwarz
Streak color grauweiß
Lustre Glasglanz
Hardness (Mohs) 3.5
Cleavages vollkommen parallel zu {001}
Crystal System monoklin, C2/c

Chemism

Chemical formula

(Ba,K)(Fe2+,Mg)3(Si,Al,Fe)4O10(S,OH)2

Chemical composition

Aluminium, Barium, Eisen, Magnesium, Silicium, Kalium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 595.36828384 u; Number of atoms in the formula: 20.5

Info

Empirical formula:

(Ba0.75K0.25)(Fe0.75Mg0.25)3(Si0.6Al0.3Fe0.1)4O10(S0.75(OH)0.25)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.08

0.5

2.44

1.0079470

0.5039735
Oxygen

O

28.22

10.5

51.22

15.9994300

167.9940150
Magnesium

Mg

3.06

0.75

3.66

24.3050600

18.2287950
Aluminium

Al

5.44

1.2

5.85

26.9815382

32.3778458
Silicon

Si

11.32

2.4

11.71

28.0855300

67.4052720
Sulfur

S

8.08

1.5

7.32

32.0655000

48.0982500
Potassium

K

1.64

0.25

1.22

39.0983100

9.7745775
Iron

Fe

24.86

2.65

12.93

55.8452000

147.9897800
Barium

Ba

17.30

0.75

3.66

137.3277000

102.9957750

Analysis wt%

SiO2 : 25.22, Al2O3 : 5.86, Fe2O3 : 6.47, FeO : 33.42, MnO : 0.70, MgO : 3.18, BaO : 19.60, K2O : 0.95, H2O : 2.13, S : 2.52

Strunz 9th edition incl. updates

9.EC.35

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
C: Schichtsilikate (Phyllosilikate) mit Glimmer Tafeln, zusammengesetzt aus tetrahedralen oder octahedralen Netzen
35:Clintonit-Gruppe

Lapis Classification

VIII/H.12-010

VIII: SILIKATE
H: Schichtsilikate
12: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen; Glimmer-Gruppe; Sprödglimmer (Margarit-Reihe)

Classification by Hölzel

9.EE.250

9: SILICATES
E: Phyllosilicates
E: ~[(OH)2|Al2Si2O10] Margarite-Group

Hey's Chemical Index of Minerals

16.12.15

16: Silicates Containing Aluminum and other Metals
12: Aluminosilicates of Sr, Ba and Zn

Dana 8th edition

71.02.02c.04

71: Phyllosilicate Minerals
02: Phyllosilicates Phyllosilicate Sheets of Six-Membered Rings with 2:1 Layers
02c: Mica Group (Margarite subgroup)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Mica group  ⇒ Brittle micas

Optical Properties

Color

schwarz

Streak color

grauweiß

Diaphaneity (Transparency)

opak

Lustre

Glasglanz

max. Birefringence

0.025 >

RI value α / ω / n

1.855

RI value γ / ε

1.880 >

2V angle

Biaxial (+)

Pleochroism

sichtbar

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell parameters a (Å)

5.412

Cell parameters b (Å)

9.434

Cell parameters c (Å)

19.953

Cell parameters a/b or c/a

0.574

Cell parameters c/b

2.115

Cell parameters α

90°

Cell parameters β

94.87

Cell parameters γ

90°

Z

4

Volume (ų)

1015.059

X-Ray Powder Diffraction

9.92(60),
4.99(90),
3.320(100),
2.716(50),
2.681(40),
2.490(80),
1.991(30),
1.660(30)
XRD chart Anandite

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)

3.5

VHN (Hardness Vickers)

130 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.94 (gemessen) 3.91 (berechnet)

3.896 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen parallel zu {001}

(Co-)Type locality

(Co-)Type locality

Sri Lanka/Nordwestprovinz/Wilagedera

Preface

Author (Name, Year)

Pattiaratchi & Saari & Sahama, 1967

References

Mineralogical Magazine 36 (1967), 1

IMA group assignments

Other languages

German

Anandit

Spanish

Anandita

French

Anandite

English

Anandite

Russian

Анандит

Japanese

ｱﾅﾝﾄﾞ鉱

Japanese

ｱﾅﾝﾄﾞ鉱-2O

Alternative Name

German

Adandit

flasche Schreibweise für Anandit

English

Anandite-2M1

Anandite-2O

CNMNC symbol

Symbol

Ana

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 7rJbOFurTUelAh1CXfOArg
GUID (Global unique identifier) 385BB2EE-AB5B-474D-A502-1D425DF380AE
Database ID 115