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Potassic-magnesiohastingsite

Collectors Summary

Color grün-braun
Hardness (Mohs) 6
Cleavages vollkommen (110)
Crystal System monoklin, C2/m
Morphology Körner bis 3 cm

Chemism

Chem­ical formula

(K,Na)Ca2(Mg,Fe2+,Fe3+,Al)5(Si,Al)8O22(OH,Cl)2

Addi­tional chem. informa­tion

Amphibol Gruppe

Chem­ical com­po­si­tion

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

Unit weight: 918.2040565 u; Number of atoms in the formula: 41.5

Info

Empirical formula:

(K0.75Na0.25)Ca2(Mg0.55Fe0.3Fe0.1Al0.05)5(Si0.75Al0.25)8O22((OH)0.75Cl0.25)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.16

1.5

3.61

1.0079470

1.5119205

Oxygen

O

40.95

23.5

56.63

15.9994300

375.9866050

Sodium

Na

0.63

0.25

0.60

22.9897702

5.7474426

Magnesium

Mg

7.28

2.75

6.63

24.3050600

66.8389150

Aluminium

Al

6.61

2.25

5.42

26.9815382

60.7084610

Silicon

Si

18.35

6

14.46

28.0855300

168.5131800

Chlorine

Cl

1.93

0.5

1.20

35.4532000

17.7266000

Potassium

K

3.19

0.75

1.81

39.0983100

29.3237325

Calcium

Ca

8.73

2

4.82

40.0784000

80.1568000

Iron

Fe

12.16

2

4.82

55.8452000

111.6904000

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.10-135

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

Clas­sifica­tion by Hölzel

9.DH.440

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

grün-braun

max. Birefrin­gence

0.020

Birefringence chart\! Potassic-magnesiohastingsite title=Birefringence chart Potassic-magnesiohastingsite

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

1.682

RI value β

1.695

RI value γ / ε

1.702

Ri mean

1.693

2V angle

Biaxial (-) 73°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell param­e­ters a (Å)

9.958

Cell param­e­ters b (Å)

18.037

Cell param­e­ters c (Å)

5.346

Cell param­e­ters a/b or c/a

0.552

Cell param­e­ters c/b

0.296

Cell param­e­ters α

90°

Cell param­e­ters β

105.498

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

925.295

X-Ray Pow­der Diffrac­tion

8.500(60), 3.385(41), 3.282(42), 3.135(100), 2.941(22), 2.720(45), 2.359(35), 2.168(29)

XRD chart Potassic-magnesiohastingsite

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

Morphol­ogy

Körner bis 3 cm

Physical Properties

Hard­ness (Mohs)

6

VHN (Hard­ness Vick­ers)

900 (g nicht angegeben)

Density (g/cm³)

3.295 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen (110)

Preface

Author (Name, Year)

Korinevsky & Korinevsky, 2006

References

Zapiski Vserossiskogo Mineralogicheskogo Obshchetstva 135 (2006) (2), 49

IMA group assignments

Other languages

German

Kalium-Magnesiohastingsit

English

Potassic-magnesiohastingsite

Alternative Name

English

Potassicmagnesiohastingsite

CNMNC (IMA)-Number

IMA 2004-027b

CNMNC symbol

Symbol

Pmhst

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

German pages

DeWikiPedia - search for: Kalium-Magnesiohastingsit
Google-Bilder-Suche - search for: Kalium-Magnesiohastingsit
Mineralienatlas.de (Forum) - search for: Kalium-Magnesiohastingsit

English pages

Mindat - search for: Potassic-magnesiohastingsite
Webmineral - search for:Potassic-magnesiohastingsite
Handbook-of-Mineralogy - search for: Potassic-magnesiohastingsite
RRUFF - Raman, XRD and other mineral data - search for: Potassic-magnesiohastingsite
RRUFF - References and PDF downloads - search for: Potassic-magnesiohastingsite
American-Mineralogist-Crystal-Structure-Database - search for: Potassic-magnesiohastingsite
Strahlen.org - search for: Potassic-magnesiohastingsite

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Kalium-Magnesiohastingsit
Crystal-Treasure.com - search for: Kalium-Magnesiohastingsit
Bosse - search for: Kalium-Magnesiohastingsit
Edelsteine Neuburg - Gundolf Fischer - search for: Kalium-Magnesiohastingsit

Locations with GPS information