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Manganilvaite (Manganilvait)

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Manganilvait
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Manganilvait
schwarze Manganilvaite auf Quarz, Dalnegorsk, Ferner osten, Russland; BB ~ 2,5 cm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Russland/Ferner Osten, Föderationskreis/Primorje (Primorskiy), Kray/Dal'negorsk (Dalnegorsk; Tetjuche)
Mineral: Manganilvaite
Image: 1576420546
License: Usage for Mineralienatlas project only
Manganilvait

schwarze Manganilvaite auf Quarz, Dalnegorsk, Ferner osten, Russland; BB 2,5 cm, analysiert
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2019-12-15
Locality: Dal'negorsk (Dalnegorsk; Tetjuche) / Primorje (Primorskiy), Kray / Ferner Osten, Föderationskreis / Russland

Collectors Summary

Color schwarz
Streak color bräunlichschwarz bis schwarz
Lustre Glasglanz
Hardness (Mohs) 5.5 - 6
Cleavages deutlich (100)
Fracture uneben
Solubility +++ HCl, gelatinisiert
Crystal System monoklin, P21/a

Chemism

Chemical formula

CaFe2+Fe3+Mn2+(Si2O7)O(OH)

Chemical composition

Calcium, Eisen, Mangan, Silicium, Sauerstoff, Wasserstoff

Unit weight: 407.8807269 u; Number of atoms in the formula: 16

Info

Empirical formula:

CaFeFeMn(Si2O7)O(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.25

1

6.25

1.0079470

1.0079470
Oxygen

O

35.30

9

56.25

15.9994300

143.9948700
Silicon

Si

13.77

2

12.50

28.0855300

56.1710600
Calcium

Ca

9.83

1

6.25

40.0784000

40.0784000
Manganese

Mn

13.47

1

6.25

54.9380499

54.9380499
Iron

Fe

27.38

2

12.50

55.8452000

111.6904000

Analysis wt%

MgO : 0.48, 0.45;
Al2O3 : 0.20, 0.34;
SiO2 : 29.65, 29.48;
CaO : 12.62, 13.06;
TiO2 : 0.02, 0.04;
MnO : 11.99, 13.54;
FeO : 40.93, 39.31;
H2O* : 2.21;
Total 98.10, 98.43;
(Ref: Canadian Mineralogist 43 (2005), 1027 - 1042) (Ossikovo, Govedarnika); *berechnet

Strunz 9th edition incl. updates

9.BE.07

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
E: Si2O7 Gruppen mit zusätzlichen Anionen; Kationen in oktahedraler [6] und größerer Koordination
07:

Lapis Classification

VIII/C.10-030

VIII: SILIKATE
C: Gruppensilikate
10: Gruppensilikate [Si2O7] 6-, mit tetraederfremden Anionen (O,OH,F)

Classification by Hölzel

9.BE.375

9: SILICATES
B: Sorosilicates
E: Cuspidine-Tilleyite-Group

Dana 8th edition

56.02.03.06

56: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O
02: Sorosilicates Sorosilicate Si2O7 Groups and O, OH, F. and H2O with cations in [4] and/or >[4] coordination
03: Lawsonite - Ilvaite group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

schwarz

Streak color

bräunlichschwarz bis schwarz

Diaphaneity (Transparency)

opak

Lustre

Glasglanz

Pleochroism

moderat, von bläulich grau bis graubraun

Anisotropism

stark in graublau bis blass rötlich braunen Farben und mit roten interne Reflexionen

Reflectivity: (Lambda nm) ↓, ↑, Ø

(400) 8.30, 10.00, 9.15
(420) 8.40, 10.10, 9.25
(440) 8.30, 10.10, 9.20
(460) 8.30, 10.00, 9.15
(480) 8.20, 9.90, 9.05
(500) 8.00, 9.90, 8.95
(520) 7.90, 9.80, 8.85
(540) 7.50, 9.80, 8.65
(560) 7.30, 9.70, 8.50
(580) 7.00, 9.70, 8.35
(589) 6.90, 9.70, 8.30
(620) 6.40, 9.50, 7.95
(640) 6.10, 9.50, 7.80
(650) 6.00, 9.40, 7.70
(680) 5.70, 9.40, 7.55
(700) 5.70, 9.30, 7.50
Reflection chart Manganilvaite

Reflectivity Ø

8.49

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/a

Cell parameters a (Å)

13.025

Cell parameters b (Å)

8.851

Cell parameters c (Å)

5.849

Cell parameters a/b or c/a

1.472

Cell parameters c/b

0.661

Cell parameters α

90°

Cell parameters β

90.17

Cell parameters γ

90°

Z

4

Volume (ų)

674.295

X-Ray Powder Diffraction

2.875(80),
2.848(90),
2.718(100),
2.687(70),
2.442(30),
2.180(50),
2.111(50),
1.475(50)
XRD chart Manganilvaite

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 - 6

VHN (Hardness Vickers)

868 (100g)

Density (g/cm³)

3.92 (gemessen)

4.018 ( ρ calc. Mineralienatlas )

Cleavages

deutlich (100)

Fracture

uneben

Tenacity

spröde

Instability

+++ HCl, gelatinisiert

(Co-)Type locality

(Co-)Type locality

Bulgarien/Smoljan (Smolyan), Oblast/Madan, Obshtina/Madan Erzfeld/Septemvri Mine (Deveti Septemvri Mine)/Grube Mogilata (Mogile; Mogila)

Bulgarien/Smoljan (Smolyan), Oblast/Madan, Obshtina/Madan Erzfeld/Septemvri Mine (Deveti Septemvri Mine)/Grube Osikovo

Preface

Rareness

selten

Author (Name, Year)

Bonev & Vassileva & Zotov & Kouzmanov, 2005

References

Bonev, I.K., Vassileva, R.D., Zotov, N., Kouzmanov, K., "Manganilvaite, CaFe2+Fe3+(Mn,Fe2+)(Si2O7)O(OH), a new mineral species of the ilvaite group, from Pb–Zn skarn deposits in the Rhodope Mountains, Bulgaria", Canadian Mineralogist: 43 (2005), 1027-1042

Zotov, N., Kockelmann, W., Jacobsen, S.D., Mitov, I., Paneva, D., Vassileva, R.D., Bonev, I.K. - "Structure and cation order in manganilvaite: a combined X-ray diffraction, neutron diffraction and Mössbauer study", Canadian Mineralogist: 43 (2005), 1043-1053

Other languages

German

Manganilvait

English

Manganilvaite

Traditional Chinese

錳黑柱石

Simplified Chinese

锰黑柱石

Alternative Name

Russian

Ильваит-Mn

CNMNC (IMA)-Number

IMA 2002-016

CNMNC symbol

Symbol

Mlv

IDs

GUSID (Global unique identifier short form) MK-djB8vxESFwz3KGT0Bbg
GUID (Global unique identifier) 8C9DAF30-2F1F-44C4-85C3-3DCA193D016E
Database ID 2362