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Hydrobiotite

Pictures (1 Images total)

Hydrobiotit
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Hydrobiotit

Fundort: Oaxaca, Mexiko; Stufengröße: 20 x 09 x 3 mm

Copyright: Torben
Contribution: Torben 2006-09-10
Locality: Oaxaca / Mexiko

Collectors Summary

Color schwarz, bräunlich, goldgelb, rosagetönt
Lustre Matt
Hardness (Mohs) 2.5 - 3
Cleavages vollkommen {001}
Crystal System monoklin, C2/m

Chemism

Chem­ical formula

K(Mg,Fe2+)6(Si,Al)8O20(OH)4·nH2O

Addi­tional chem. informa­tion

Eine 1:1-Schichtung von Biotit/Vermiculit. Hydrobiotit entsteht als Verwitterungsprodukt von Biotit und findet sich z.B. in Vermiculit-Vorkommen.

Chem­ical com­po­si­tion

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

Unit weight: 860.7485684 u; Number of atoms in the formula: 46

Info

Empirical formula:

K(Mg0.75Fe0.25)6(Si0.75Al0.25)8O20(OH)4·nH2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.70

6

13.04

1.0079470

6.0476820

Oxygen

O

46.47

25

54.35

15.9994300

399.9857500

Magnesium

Mg

12.71

4.5

9.78

24.3050600

109.3727700

Aluminium

Al

6.27

2

4.35

26.9815382

53.9630764

Silicon

Si

19.58

6

13.04

28.0855300

168.5131800

Potassium

K

4.54

1

2.17

39.0983100

39.0983100

Iron

Fe

9.73

1.5

3.26

55.8452000

83.7678000

Anal­y­sis wt%

SiO2 : 35.60, Al2O3 : 11.85, TiO2 : 1.13, Fe2O3 : 10.28, FeO : 0.81, MgO : 20.17, CaO : 1.44, K2O : 3.17, H2O : 14.76 (Ref: CLM66)

Strunz 9th edi­tion incl. updates

9.EC.60

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

Clas­sifica­tion by Hölzel

9.EG.100

9: SILICATES
E: Phyllosilicates
G: Hydrated Micas
1: Hydromicas

Dana 8th edi­tion

71.02.02d.01

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

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

schwarz, bräunlich, goldgelb, rosagetönt

Diaphane­ity (Trans­parency)

durchscheinend

Lus­tre

Matt

RI value β

1.560 - 1.562

RI value γ / ε

1.565 - 1.567

Ri mean

1.564

2V angle

Biaxial (-) 10° - 13° (gemessen)

Absorp­tion

X > Y > Z

Pleochro­ism

Schattierungen von braun

Image ⇒ Luminescence ⇒ excitation ⇒ UV shortwave ~254nm (1 Images total)

Hydrobiotit
Views (Image: 1401394246): 679
Hydrobiotit (SNr: A003904)

Deckungsgleiche Aufnahmen, braune blättrige Kristalle, das UV-Bild (254nm) zeigt eine grüne Fluoreszenz für Hydrobiotit; BB = 3,8 mm. Fundort: Franklin, Ellijay, District, Cowee Valley, Macon Co., ...

Collection: Lithothek der Münchener Micromounter
Copyright: Bebo
Contribution: Münchener Micromounter 2014-05-29
Locality: Franklin / Ellijay, District / Cowee Valley / Macon Co. / North Carolina / USA

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell param­e­ters a (Å)

5.2

Cell param­e­ters b (Å)

9

Cell param­e­ters c (Å)

24.5

Cell param­e­ters a/b or c/a

0.578

Cell param­e­ters c/b

2.722

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

1146.6

Physical Properties

Hard­ness (Mohs)

2.5 - 3

VHN (Hard­ness Vick­ers)

18 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.49 - 2.64 (gemessen)

2.493 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen {001}

Tenac­ity

spröde bis elastisch

References

Schrauf A (1882) Beiträge zur kenntniss des associationskreises der magnesiasilicate, Zeitschrift für Krystallographie und Mineralogie 6, 321-388

Redefined: Brindley G W, Zalba P E, Bethke C M (1983) Hydrobiotite, a regular 1 : 1 interstratification of biotite and vermiculite layers, American Mineralogist 68, 420-425

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Dozyite

Mg7(Al,Fe3+,Cr)2[(OH)12|Al2Si4O15]

monoklin : m : Cm

9.EC.60

Kulkeite

Na0.35Mg8Al(AlSi7)O20(OH)10

9.EC.60

Tosudite

Na0.5(Al,Mg)6(Si,Al)8O18(OH)12·5H2O

9.EC.60

Aliettite

Ca0.2Mg6(Si,Al)8O20(OH)4·4H2O

9.EC.60

Rectorite

(Na,Ca)Al4(Si,Al)8O20(OH)4·2H2O

9.EC.60

Saliotite

Na0.5Li0.5Al3[(OH)5|AlSi3O10]

monoklin : 2/m : C2/m

9.EC.60

Corrensite

(Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10·nH2O

9.EC.60

'Karpinskite'

(Mg,Ni)2Si2O5(OH)2

9.EC.60

Hydrobiotite

K(Mg,Fe2+)6(Si,Al)8O20(OH)4·nH2O

monoklin : 2/m : C2/m

9.EC.60

Cortesognoite

CaV2Si2O7(OH)2·H2O

orthorhombisch : mmm : Cmcm

9.EC.60

Lunijianlaite

Li0.7Al6.2(Si7AlO20)(OH,O)10

9.EC.60

Brinrobertsite

(Na,K,Ca)0.3(Al,Fe,Mg)4(Si,Al)8O20(OH)4·3.5H2O

9.EC.60

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Hydrobiotite

K(Mg,Fe2+)6(Si,Al)8O20(OH)4·nH2O

monoklin : 2/m : C2/m

9.EG.100

Lennilenapeite

K6-7(Mg,Mn,Fe2+,Fe3+,Zn)48(Si,Al)72(O,OH)216·16H2O

9.EG.140

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Talc

Mg3Si4O10(OH)2

monoklin : 2/m : C2/c

71.02.01.03

Willemseite

(Ni,Mg)3Si4O10(OH)2

monoklin : m : Cc

71.02.01.04

'Glauconite'

(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2

monoklin : 2/m : C2/m

71.02.02a.05

Tobelite

(NH4,K)Al2(Si3Al)O10(OH)2

monoklin : 2/m : C2/m

71.02.02a.07

'Tetraferriannite'

KFe2+3(Si3Fe3+)O10(OH)2

monoklin : 2/m : C2/m

71.02.02b.04

Sokolovaite

CsLi2AlSi4O10F2

71.02.02b.08b

Zinkosite

ZnSO4

orthorhombisch : mmm : Pnma

71.02.02b.10

'Zinnwaldite'

KLiFe2+Al(AlSi3)O10(F,OH)2

monoklin : 2 : C2

71.02.02b.10

'Ephesite'

NaLiAl2(Al2Si2)O10(OH)2

monoklin : m : Cc

71.02.02b.16

Clintonite

Ca(Mg,Al)3(Al3Si)O10(OH)2

monoklin : 2/m, m : C2/m, ?

71.02.02c.02

Anandite

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

monoklin : 2/m : C2/c

71.02.02c.04

Oxykinoshitalite

(Ba,K)(Mg,Fe2+,Ti4+)3(Si,Al)4O10O2

monoklin : 2/m : C2/m

71.02.02c.08

Hydrobiotite

K(Mg,Fe2+)6(Si,Al)8O20(OH)4·nH2O

monoklin : 2/m : C2/m

71.02.02d.01

Cuprorivaite

CaCuSi4O10

tetragonal : 4/mmm : P4/ncc

71.02.03.01

Gillespite

BaFe2+Si4O10

tetragonal : 4/mmm : P4/ncc

71.02.03.02

Effenbergerite

BaCu[Si4O10]

tetragonal : 4/mmm : P4/ncc

71.02.03.03

Wesselsite

Sr0.9Ba0.1CuSi4O10

tetragonal : 4/mmm : P4/ncc

71.02.03.04

Ferrisurite

(Pb,Ca)2-3(Fe3+,Al)2[(OH,F)2.5-3|(CO3)1.5-2|Si4O10]·0.5 H2O

monoklin : 2, 2/m : P21, P21/m

71.02.04.01

Surite

Pb2Ca(Al,Mg)2(Si,Al)4O10(OH)2(CO3,OH)3·0.5 H2O

monoklin : 2 : P21

71.02.04.02

Niksergievite

(Ba, Ca)2Al3[(OH)6|CO3|(Si, Al)4O10]·0.2 H2O

monoklin : 2/m, 2, m : C2/m, C2, Cm

71.02.04.03

Macaulayite

(Fe3+,Al)24Si4O43(OH)2

71.02.05.01

Other languages

German

Hydrobiotit

Spanish

Hydrobiotita

English

Hydrobiotite

Russian

Гидробиотит

Japanese

水硼酸石

Simplified Chinese

水黑云母

Alternative Name

Italian

Hidrobiotita

German

Ledikit

Spanish

Ledikita

English

Ledikite

German

Philadelphit

English

Philadelphite

German

Voigtit

Spanish

Voigtita

English

Voigtite

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

German pages

DeWikiPedia - search for: Hydrobiotit
Google-Bilder-Suche - search for: Hydrobiotit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Hydrobiotit

English pages

Mindat - search for: Hydrobiotite
Webmineral - search for:Hydrobiotite
Handbook-of-Mineralogy - search for: Hydrobiotite
RRUFF - Raman, XRD and other mineral data - search for: Hydrobiotite
RRUFF - References and PDF downloads - search for: Hydrobiotite
American-Mineralogist-Crystal-Structure-Database - search for: Hydrobiotite
Athena - search for: Hydrobiotite

Russian pages

Webmineral.ru - search for: Гидробиотит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Hydrobiotit
Crystal-Treasure.com - search for: Hydrobiotit
Bosse - search for: Hydrobiotit

Locations with GPS information