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Brinrobertsite

Collectors Summary

Color grau, gelbgrau
Streak color grau
Lustre matt, Glasglanz
Hardness (Mohs) 1
Cleavages vollkommen {001}
Crystal System monoklin,
Morphology Anhedrale Körner in Aggregaten bis zu 0,02 mm Durchmesser. Einzelne Körner weniger als 1 μm.

Chemism

Chem­ical formula

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

Chem­ical com­po­si­tion

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

Unit weight: 823.899312616 u; Number of atoms in the formula: 50.8

Info

Empirical formula:

(Na0.6K0.3Ca0.1)0.3(Al0.6Fe0.3Mg0.1)4(Si0.75Al0.25)8O20(OH)4·3.5H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.35

11

21.65

1.0079470

11.0874170

Oxygen

O

53.40

27.5

54.13

15.9994300

439.9843250

Sodium

Na

0.50

0.18

0.35

22.9897702

4.1381586

Magnesium

Mg

1.18

0.4

0.79

24.3050600

9.7220240

Aluminium

Al

14.41

4.4

8.66

26.9815382

118.7187681

Silicon

Si

20.45

6

11.81

28.0855300

168.5131800

Potassium

K

0.43

0.09

0.18

39.0983100

3.5188479

Calcium

Ca

0.15

0.03

0.06

40.0784000

1.2023520

Iron

Fe

8.13

1.2

2.36

55.8452000

67.0142400

Anal­y­sis wt%

SiO2 74.82, Al2O3 12.01, TiO2 0.17, Fe2O3 7.66, MgO 1.03, CaO 0.17, Na2O 1.03, K2O 0.31, MnO 0.06, P2O5 0.02, LOI 3.01, gesamt 100.30 Gewicht%

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

Lapis Clas­sifica­tion

VIII/H.19-010

VIII: SILIKATE
H: Schichtsilikate
19: Tonminerale, regulär geschichtet; Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen; Montmorillonit-Gruppe

Clas­sifica­tion by Hölzel

9.EB.210

9: SILICATES
E: Phyllosilicates
B: ~[(OH)2|Si4O10] Pyrophyllite-Talc-Group

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

grau, gelbgrau

Streak color

grau

Diaphane­ity (Trans­parency)

durchscheinend

Lus­tre

matt, Glasglanz

Optical Data Luminescence

Lumi­nes­cence

keine Fluoreszenz bekannt

Crystallography

Crystal Sys­tem

monoklin

Cell param­e­ters a (Å)

5.2

Cell param­e­ters b (Å)

9.1

Cell param­e­ters c (Å)

24.4

Cell param­e­ters a/b or c/a

0.571

Cell param­e­ters c/b

2.681

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

1154.608

X-Ray Pow­der Diffrac­tion

22.3(50),
11.0(100),
7.32(10),
5.48(10),
4.47(10),
3.17(30),
2.01(10)

XRD chart Brinrobertsite

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

Morphol­ogy

Anhedrale Körner in Aggregaten bis zu 0,02 mm Durchmesser. Einzelne Körner weniger als 1 μm.

Physical Properties

Hard­ness (Mohs)

1

Density (g/cm³)

2.37 (Original aus Mangel an reinem Material keine Dichte bestimmt)

2.37 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen {001}

(Co-)Type locality

(Co-)Type locality

UK/Wales/Gwynedd/Bangor/Aber-Ogwen/Nant Ffrancon Formation

Preface

Name from

Dr. Brin Roberts, Birkbeck College, Universität von London, UK

Author (Name, Year)

Dong & Peacor & Merriman & Kamp, 2002

References

DONG, H., PEACOR, D.R., MERRIMAN, R.J. & KEMP, S.J. (2002): Brinrobertsite, a new RI interstratified pyrophyllite/smectite-like clay mineral: characterization and geological origin. Mineralogical Magazine 66, 605-617.

American Mineralogist 88 (2003), 931

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

Brinrobertsite

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

VIII/H.19-010

Montmorillonite

(Na,Ca)0.3(Al,Mg)2Si4O10(OH)2·nH2O

monoklin : 2/m : C2/m

VIII/H.19-020

Beidellite

(Na,Ca0.5)0.3Al2(Si,Al)4O10(OH)2·4H2O

VIII/H.19-030

Nontronite

Na0.3Fe23+(Si,Al)4O10(OH)2·4H2O

VIII/H.19-040

Volkonskoite

Ca0.3(Cr3+,Mg,Fe3+)2(Si,Al)4O10(OH)2·4H2O

VIII/H.19-050

Swinefordite

(Ca,Na)0.3(Al,Li,Mg)2(Si,Al)4O10(OH,F)2·2H2O

VIII/H.19-060

Yakhontovite

(Ca,Na,K)0.3(CuFe2+Mg)2Si4O10(OH)2·3H2O

VIII/H.19-070

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

Pyrophyllite

Al2Si4O10(OH)2

monoklin : 2/m : C2/c

9.EB.200

Brinrobertsite

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

9.EB.210

Ferripyrophyllite

Fe3+Si2O5(OH)

monoklin : 2/m : C2/c

9.EB.220

Other languages

German

Brinrobertsit

Spanish

Brinrobertsita

French

Brinrobertsite

English

Brinrobertsite

Russian

Бринробертсит

Simplified Chinese

叶腊石间蒙皂石

Traditional Chinese

葉臘石間蒙皂石

IMA Number

IMA 1997-040

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Бринробертсит

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Brinrobertsit
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Locations with GPS information