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Benstonite

Pictures (2 Images total)

Benstonit XX auf Sphalerit
Views (Image: 1170065224): 2009
Benstonit XX auf Sphalerit

Größe: 7.8 x 4.9 x 4 cm; Fundort: Minerva No. 1 Mine, Cave-in-Rock, Illinois-Kentucky Fluorspar District, Hardin Co., Illinois, USA

Copyright: Rob Lavinsky
Contribution: slugslayer 2007-01-29
Locality: Minerva No. 1 Mine (Ozark Mahoning No.1) / Cave-in-Rock / Cave-in-Rock Sub-District / Illinois-Kentucky Fluorspar District / Hardin Co. / Illinois / USA
Benstonit
Views (Image: 1408010276): 1237
Benstonit

Weiße Benstonit-Kristalle mit Hausmannit. Fundort: Langban, Filipstad, Schweden. Bildbreite: 1,3 mm.

Collection: Ulrich Baumgärtl
Copyright: Ulrich Baumgärtl
Contribution: raritätenjäger 2014-08-14
Locality: Långban, Distrikt / Filipstad, Gemeinde / Värmland, Provinz / Schweden

Collectors Summary

Color schneeweiß, gelbbraun, weiß, hellgelb
Streak color weiß
Hardness (Mohs) 3.5
Solubility +++ Säuren
Crystal System trigonal, R3

Chemism

Chem­ical formula

(Ba,Sr)6(Ca,Mn)6Mg(CO3)13

Chem­ical com­po­si­tion

Barium, Calcium, Magnesium, Mangan, Strontium, Kohlenstoff, Sauerstoff

Unit weight: 1816.58899485 u; Number of atoms in the formula: 65

Info

Empirical formula:

(Ba0.75Sr0.25)6(Ca0.75Mn0.25)6Mg(CO3)13

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Carbon

C

8.60

13

20.00

12.0107800

156.1401400

Oxygen

O

34.35

39

60.00

15.9994300

623.9777700

Magnesium

Mg

1.34

1

1.54

24.3050600

24.3050600

Calcium

Ca

9.93

4.5

6.92

40.0784000

180.3528000

Manganese

Mn

4.54

1.5

2.31

54.9380499

82.4070749

Strontium

Sr

7.24

1.5

2.31

87.6210000

131.4315000

Barium

Ba

34.02

4.5

6.92

137.3277000

617.9746500

Anal­y­sis wt%

BaO : 43.05, SrO : 4.02, CaO : 19.52, MgO : 1.69, CO2 : 31.35 (Ref: American Mineralogist 62)

Strunz 9th edi­tion incl. updates

5.AB.55

5: Carbonate (Carbonate, Nitrate)
A: Carbonate ohne weitere Anionen, ohne H2O
B: Alkali-Erden- (und andere M2*) Carbonate
55:Juangodoyit-Gruppe

Lapis Clas­sifica­tion

V/B.03-080

V: NITRATE, CARBONATE UND BORATE
B: Wasserfreie Carbonate [CO3] 2-, ohne fremde Anionen
3: Dolomit-Gruppe

Clas­sifica­tion by Hölzel

5.AB.390

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
A: Carbonates (-Anions -Water)
B: Carbonates: hexagonal or trigonal
3: Other Double Carbonates

Dana 8th edi­tion

14.02.03.01

14: Anhydrous Carbonates
02: Anhydrous Carbonates with Compound Formula A+ B++ (CO3)2

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

schneeweiß, gelbbraun, weiß, hellgelb

Streak color

weiß

Diaphane­ity (Trans­parency)

durchscheinend

max. Birefrin­gence

0.163

Birefringence chart\! Benstonite title=Birefringence chart Benstonite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.690

RI value γ / ε

1.527

Ri mean

1.636

2V angle

Uniaxial (-)

Optical Data Luminescence

Lumi­nes­cence

phosphoreszierend fluoreszierend

Color LW-UV (365nm)

 

orange

Color SW-UV (254nm)

 

rot

SW-UV Other Col­ors

 

violettrosa

Most Common Acti­vator

Mn2+

After­glow (Per­sistant Lumi­nes­cence)

keine Daten

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3

Space Group number

148

Space Group

R3

Cell param­e­ters a (Å)

18.28

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

8.67

Cell param­e­ters a/b or c/a

0.474

Cell param­e­ters c/b

-

Z

3

Volumne (ų)

2509.008

X-Ray Pow­der Diffrac­tion

4.19(20),
3.92(40),
3.53(10),
3.08(100),
2.536(30),
2.127(20),
1.945(10),
1.905(20)

XRD chart Benstonite

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)

3.596 - 3.66 / Durchschnittlich = 3.62

3.607 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ Säuren

Preface

Author (Name, Year)

Lippmann, 1962

References

American Mineralogist 47 (1962), 585

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

Benstonite

(Ba,Sr)6(Ca,Mn)6Mg(CO3)13

trigonal : 3 : R3

5.AB.55

Juangodoyite

Na2Cu(CO3)2

monoklin : 2/m : P21/a

5.AB.55

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

Dolomite

CaMg(CO3)2

trigonal : 3 : R3

V/B.03-010

Ankerite

Ca(Fe2+,Mg,Mn)(CO3)2

trigonal : 3 : R3

V/B.03-020

Kutnohorite

CaMn2+(CO3)2

trigonal : 3 : R3

V/B.03-030

Minrecordite

CaZn(CO3)2

trigonal : 3 : R3

V/B.03-040

Norsethite

BaMg(CO3)2

trigonal : 3m : R3m

V/B.03-050

Huntite

CaMg3(CO3)4

trigonal : 32 : R32

V/B.03-070

Benstonite

(Ba,Sr)6(Ca,Mn)6Mg(CO3)13

trigonal : 3 : R3

V/B.03-080

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

Khanneshite

(NaCa)3(Ba,Sr,Ce,Ca)3(CO3)5

hexagonal : 6mm : P63mc

5.AB.300

Sanrománite

Na2CaPb3(CO3)5

hexagonal : 6mm : P63mc

5.AB.305

Burbankite

(Na,Ca)3(Sr,Ba,Ce)3(CO3)5

hexagonal : 6mm : P63mc

5.AB.310

Calcioburbankite

Na3(Ca,Ce,La,Sr)3(CO3)5

hexagonal : 6mm : P63mc

5.AB.315

Zemkorite

(Na,K)2Ca(CO3)2

hexagonal : 6mm, 6m2, 6/mmm : P63mc, P62c, P63/mmc

5.AB.320

Fairchildite

K2Ca(CO3)2

hexagonal : 6/mmm : P63/mmc

5.AB.330

Gregoryite

(Na2,K2,Ca)CO3

hexagonal : 6mm : P63mc

5.AB.340

Olekminskite

Sr(Sr,Ca,Ba)(CO3)2

trigonal : 32 : P321

5.AB.360

Paralstonite

BaCa(CO3)2

trigonal : 32 : P321

5.AB.365

Huntite

CaMg3(CO3)4

trigonal : 32 : R32

5.AB.380

Benstonite

(Ba,Sr)6(Ca,Mn)6Mg(CO3)13

trigonal : 3 : R3

5.AB.390

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

Dolomite

CaMg(CO3)2

trigonal : 3 : R3

14.02.01.01

Ankerite

Ca(Fe2+,Mg,Mn)(CO3)2

trigonal : 3 : R3

14.02.01.02

Kutnohorite

CaMn2+(CO3)2

trigonal : 3 : R3

14.02.01.03

Minrecordite

CaZn(CO3)2

trigonal : 3 : R3

14.02.01.04

Norsethite

BaMg(CO3)2

trigonal : 3m : R3m

14.02.02.01

Paralstonite

BaCa(CO3)2

trigonal : 32 : P321

14.02.02.02

Olekminskite

Sr(Sr,Ca,Ba)(CO3)2

trigonal : 32 : P321

14.02.02.03

Benstonite

(Ba,Sr)6(Ca,Mn)6Mg(CO3)13

trigonal : 3 : R3

14.02.03.01

Ewaldite

Ba(Na,Ca,Y,Ce,K)(CO3)2·2.6H2O

hexagonal : 6mm : P63mc

14.02.04.01

Alstonite

BaCa(CO3)2

trigonal : P31m

14.02.05.01

Barytocalcite

BaCa(CO3)2

monoklin : 2/m : P21/m

14.02.06.01

Other languages

German

Benstonit

Spanish

Benstonita

English

Benstonite

French

Benstonite

Russian

Бенстонит

Simplified Chinese

菱碱土矿

CNMNC symbol

Symbol

Ben

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

German pages

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

English pages

Mindat - search for: Benstonite
Webmineral - search for:Benstonite
Handbook-of-Mineralogy - search for: Benstonite
RRUFF - Raman, XRD and other mineral data - search for: Benstonite
RRUFF - References and PDF downloads - search for: Benstonite
American-Mineralogist-Crystal-Structure-Database - search for: Benstonite
Athena - search for: Benstonite
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Mineralienatls.de (Forum) - search for: Benstonit

Russian pages

Webmineral.ru - search for: Бенстонит

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German pages

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