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Potassic-fluoro-hastingsite

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Kalium-Fluor-Hastingsit
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Kalium-Fluor-Hastingsit

Kalium-Fluor-Hastingsit; USA/New York/Orange Co./Woodbury Township/Greenwood Mine; 3 x 1,5 x 1,2 mm Größe; Bildausschnitt: ca. 3mm
Copyright: Stefan
Contribution: Stefan 2017-10-26
Locality: Greenwood Mine / Woodbury Township / Orange Co. / New York / USA

Collectors Summary

Color schwarz
Streak color grünlichgrau
Lustre Glasglanz
Hardness (Mohs) 6
Cleavages vollkommen (110)
Fracture muschelig
Crystal System monoklin, C2/m

Chemism

Chem­ical formula

KCa2(Fe2+2Mg2Fe3+)(Si6Al2)O22F2

Chem­ical com­po­si­tion

Aluminium, Calcium, Eisen, Magnesium, Silicium, Fluor, Kalium, Sauerstoff

Unit weight: 947.8613529 u; Number of atoms in the formula: 40

Info

Empirical formula:

KCa2(Fe2Mg2Fe)(Si6Al2)O22F2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

37.13

22

55.00

15.9994300

351.9874600
Fluorine

F

4.01

2

5.00

18.9984033

37.9968065
Magnesium

Mg

5.13

2

5.00

24.3050600

48.6101200
Aluminium

Al

5.69

2

5.00

26.9815382

53.9630764
Silicon

Si

17.78

6

15.00

28.0855300

168.5131800
Potassium

K

4.12

1

2.50

39.0983100

39.0983100
Calcium

Ca

8.46

2

5.00

40.0784000

80.1568000
Iron

Fe

17.68

3

7.50

55.8452000

167.5356000

Strunz 9th edi­tion incl. updates

9.DE.15

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
E: Ketten- und Bandsilikate mit 2-periodischen Doppelketten, Si4O11; Amphibol-Familie, Klinoamphibole
15:Amphibole: Ca > Na

Lapis Clas­sifica­tion

VIII/F.10-144

VIII: SILIKATE
F: Ketten- und Bandsilikate
10: Zweierbänder [Si4O11] 6-; Amphibol-Gruppe; Ca2-Amphibole

Clas­sifica­tion by Hölzel

9.DH.415

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
H: Amphiboles; Calcic Amphiboles
4: Hastingsite-Group

IMA sta­tus

anerkannt 2005

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

 Amphibole supergroup  ⇒ (OH,F,Cl)-dominant amphiboles  ⇒ Calcium amphiboles  ⇒ Hastingsite (Hs) amphiboles

Optical Properties

Color

schwarz

Streak color

grünlichgrau

Diaphane­ity (Trans­parency)

durchscheinend

Lus­tre

Glasglanz

max. Birefrin­gence

0.030
Birefringence chart\! Potassic-fluoro-hastingsite title=Birefringence chart Potassic-fluoro-hastingsite

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

1.668

RI value β

1.688

RI value γ / ε

1.698

Ri mean

1.685

2V angle

Biaxial (-) 55°

Ori­enta­tion

Y = b, Z ^ c = 23°

Pleochro­ism

stark; X = blaugrün, Y = grün zu bräunlich grün, Z = blau zu hellblau

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell param­e­ters a (Å)

9.9480

Cell param­e­ters b (Å)

18.1777

Cell param­e­ters c (Å)

5.3302

Cell param­e­ters a/b or c/a

0.547

Cell param­e­ters c/b

0.293

Cell param­e­ters α

90°

Cell param­e­ters β

105.140

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

930.414

X-Ray Pow­der Diffrac­tion

8.499(100), 3.401(11), 3.299(32), 3.151(76), 2.830(53), 2.722(23), 2.402(17), 1.661(10)
XRD chart Potassic-fluoro-hastingsite

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)

6

Density (g/cm³)

3.289 (gemessen)

3.383 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen (110)

Frac­ture

muschelig

Tenac­ity

spröde

(Co-)Type locality

(Co-)Type locality

USA/New York/Orange Co./Woodbury Township/Greenwood Mine

Preface

Name from

der chemischen Zugehörigkeit zu Hastingsit

Author (Name, Year)

Lupulescu, M.V., Rakovan, J.F., Dyar, M.D., Robinson, G.W., and Hughes, J.M. (2009)

References

Lupulescu, M.V., Rakovan, J.F., Dyar, M.D., Robinson, G.W., and Hughes, J.M. (In Review) Fluoro-potassichastingsite from Greenwood Mine (Orange County, New York, USA): a new end member of the calcic amphiboles. Canadian Mineralogist 44.

IMA group assignments

 
Amphibole supergroup
 
 
 

 
 
(OH,F,Cl)-dominant amphiboles
 
 
 

 
 
 
Calcium amphiboles
 
 
 

 
 
 
 
Hastingsite (Hs) amphiboles
 
 
 

 
 
 
 
 
Hastingsite
NaCa2(Fe2+,Mg)4Fe3+(Si6Al2)O22(OH)2
monoklin
C2/m

 
 
 
 
 
Magnesiohastingsite
NaCa2(Mg,Fe2+)4Fe3+(Si6Al2)O22(OH)2
monoklin
C2/m

 
 
 
 
 
Magnesio-fluoro-hastingsite
NaCa2(Mg4Fe3+)(Si6Al2)O22F2
monoklin
C2/m

 
 
 
 
 
Oxo-magnesio-hastingsite
NaCa2(Mg2Fe3+3)(Si6Al2)O22O2
monoklin
C2/m

 
 
 
 
 
Potassic-chloro-hastingsite
KCa2(Fe2+3MgFe3+)(Si6Al2)O22Cl2
monoklin
C2/m

 
 
 
 
 
Potassic-fluoro-hastingsite
KCa2(Fe2+2Mg2Fe3+)(Si6Al2)O22F2
monoklin
C2/m

 
 
 
 
 
Potassic-hastingsite
KCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2
monoklin
C2/m

 
 
 
 
 
Potassic-magnesiohastingsite
(K,Na)Ca2(Mg,Fe2+,Fe3+,Al)5(Si,Al)8O22(OH,Cl)2
monoklin
C2/m

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Actuality: 01. Jul 2022 - 02:28:02

Other languages

German

Kalium-Fluor-Hastingsit

English

Potassic-fluoro-hastingsite

Russian

Калийфторгастингсит

old name

German

Fluoro-Kaliumhastingsit

English

Fluoro-potassichastingsite

Alternative Name

German

Fluor-Kaliumhastingsit

English

Fluorokaliumhastingsit

CNMNC (IMA)-Number

IMA 2005-006

CNMNC symbol

Symbol

Pfhst

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

German pages

 DeWikiPedia - search for: Kalium-Fluor-Hastingsit
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English pages

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RRUFF - Raman, XRD and other mineral data - search for: Potassic-fluoro-hastingsite
RRUFF - References and PDF downloads - search for: Potassic-fluoro-hastingsite
American-Mineralogist-Crystal-Structure-Database - search for: Potassic-fluoro-hastingsite
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Russian pages

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German pages

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