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Ferriandrosite-(La) (Ferriandrosit-(La))

Additional Functions

Collectors Summary

Color schwarz, dunkelbraun
Crystal System monoklin, P21/m

Chemism

Chemical formula

Mn2+LaFe3+AlMn2+(Si2O7)(SiO4)O(OH)

Additional chem. information

Fe3+ Analog von Androsit

Chemical composition

Aluminium, Eisen, Lanthanum, Mangan, Silicium, Sauerstoff, Wasserstoff

Unit weight: 624.865485 u; Number of atoms in the formula: 22

Info

Empirical formula:

MnLaFeAlMn(Si2O7)(SiO4)O(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.16

1

4.55

1.0079470

1.0079470

Oxygen

O

33.29

13

59.09

15.9994300

207.9925900

Aluminium

Al

4.32

1

4.55

26.9815382

26.9815382

Silicon

Si

13.48

3

13.64

28.0855300

84.2565900

Manganese

Mn

17.58

2

9.09

54.9380499

109.8760998

Iron

Fe

8.94

1

4.55

55.8452000

55.8452000

Lanthanum

La

22.23

1

4.55

138.9055200

138.9055200

Strunz 9th edition incl. updates

9.BG.05

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
G: Gruppen(Soro)-Silikate mit gemischten SiO4 und Si2O7 Gruppen; Kationen in oktahedraler [6] und größerer Koordination
05:Epidot-Gruppe

Lapis Classification

VIII/C.23-071

VIII: SILIKATE
C: Gruppensilikate
23: Mischstrukturen mit [SiO4] 4--Inseln und [Si2O7] 6--Gruppen; Epidot-Gruppe

IMA status

anerkannt - CNMNC Newsletter No. 20, June 2014, page 551

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Epidote supergroup  ⇒ Allanite group

Optical Properties

Color

schwarz, dunkelbraun

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

11

Space Group

P21/m

Cell parameters a (Å)

8.8779(1)

Cell parameters b (Å)

5.7399(1)

Cell parameters c (Å)

10.0875(2)

Cell parameters a/b or c/a

1.547

Cell parameters c/b

1.757

Cell parameters α

90°

Cell parameters β

113.899°

Cell parameters γ

90°

Z

2

Volume (ų)

469.968

Crystal structure

Epidot-Supergruppe, Struktur bestimmt

X-Ray Powder Diffraction

9.223(23), 3.510(46), 2.900(100), 2.870(40), 2.710(35), 2.706(35), 2.615(53), 2.573(26)

XRD chart Ferriandrosite-(La)

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

Physical Properties

Density (g/cm³)

4.415 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Japan/Honshū (Honschu), Insel/Kinki, Region (Kansai Zweckverband)/Mie, Präfektur/Ise, Stadt

Japan/Honshū (Honschu), Insel/Kinki, Region (Kansai Zweckverband)/Mie, Präfektur/Ise, Stadt/Shobu/Unbenannte Mangan-Lagerstätte

Type material

National Museum of Nature and Science, Tsukuba, Japan

Collection number of type material

NSM M-43920

Preface

Author (Name, Year)

Nagashima M., Nishio-Hamane D., N. Tomita, Minakawa T., S. Inaba (2013)

References

Nagashima, M., Nishio-Hamane, D., Tomita, N., Minakawa, T. and Inaba, S. (2014) Ferriandrosite-(La), IMA 2013-127. CNMNC Newsletter No. 20, June 2014, page 551; Mineralogical Magazine, 78, 549-558.

Nagashima, M., Nishio-Hamane, D., Tomita, N., Minakawa, T., Inaba, S. - Ferriakasakaite-(La) and ferriandrosite-(La): new epidote-supergroup minerals from Ise, Mie Prefecture, Japan. Mineralogical Magazine, 79 (2015), 735-753.

IMA group assignments

Other languages

German

Ferriandrosit-(La)

English

Ferriandrosite-(La)

Russian

Ферриандросит-(La)

Japanese

ランタンフェリアンドロス石

CNMNC (IMA)-Number

IMA 2013-127

CNMNC symbol

Symbol

Fea-La

IDs

GUSID (Global unique identifier short form) 6pPGvzrCt0egcSwhymjEyw
GUID (Global unique identifier) BFC693EA-C23A-47B7-A071-2C21CA68C4CB
Database ID 7750