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Irhtemite

Pictures (10 Images total)

Irhtemit
Views (Image: 1217485712): 1329
Irhtemit

Bildbreite: 7 mm; Fundort: Ightem Mine (Irhtem Mine), Ightem, Bou Azzer District, Tazenakht, Marokko
Copyright: Leonardus
Contribution: slugslayer 2008-07-31
Locality: Ightem (Irhtem) / Agdz, Cercle / Zagora, Provinz / Drâa-Tafilalet, Region / Marokko
Irhtemit
Views (Image: 1423322101): 835
Irhtemit

fliederfarben. mit Pikropharmakolith, Pharmakolith; und Erythrin; Bildbreite: 9 mm; Fundort: Wechselschacht, Nentershausen - Süß,; Richelsdorfer Gebirge, Hessen,Deutschland.
Collection: Werner Simon
Copyright: Werner Simon
Contribution: Steinkautz 2015-02-07
Locality: Wechselschacht / Süß / Nentershausen / Richelsdorfer Gebirge / Hersfeld-Rotenburg, Landkreis / Kassel, Bezirk / Hessen / Deutschland
Irhtemit nach Guerinit
Views (Image: 1337933185): 772
Irhtemit nach Guerinit

Bildbreite: 8 mm; Fundort: Wechselschacht, Hohesüßer Revier,; Nentershausen-Süß, Richelsdorfer Gebirge,; Hessen, Deutschland.
Collection: Steinkautz
Copyright: Steinkautz
Contribution: Steinkautz 2012-05-25
Locality: Wechselschacht / Süß / Nentershausen / Richelsdorfer Gebirge / Hersfeld-Rotenburg, Landkreis / Kassel, Bezirk / Hessen / Deutschland
Irhtemit
Views (Image: 1217618509): 995
Irhtemit

Bildbreite: 5 mm; Fundort: Mercur Mine, Mercur District, Oquirrh Mts, Tooele Co., Utah, USA
Copyright: Leonardus
Contribution: slugslayer 2008-08-01
Locality: Mercur Mine / Mercur District / Oquirrh Mts. / Tooele Co. / Utah / USA
Irhtemit
Views (Image: 1350931309): 960
Irhtemit

weiße durchscheinende Irhtemit xx. BB ca. 5 mm; Fundort: Wechselschacht/Richelsdorfer Gebirge/Nordhessen/Hessen/Deutschland
Collection: Detlef Heilwagen (gladhammar)
Copyright: Detlef Heilwagen (gladhammar)
Contribution: gladhammar 2012-10-22
Locality: Wechselschacht / Süß / Nentershausen / Richelsdorfer Gebirge / Hersfeld-Rotenburg, Landkreis / Kassel, Bezirk / Hessen / Deutschland
Irhtemit
Views (Image: 1342981921): 993
Irhtemit

Bildbreite: 7 mm; Fundort: Kurfürsten- Rücken, Friedenschacht,; Bauhäuser Revier, Richelsdorfer Gebirge,; Hessen, Deutschland.
Collection: Werner Simon
Copyright: Werner Simon
Contribution: Steinkautz 2012-07-22
Locality: Friedenschacht / Süß / Nentershausen / Richelsdorfer Gebirge / Hersfeld-Rotenburg, Landkreis / Kassel, Bezirk / Hessen / Deutschland

Collectors Summary

Color farblos, weiß, blass rose, rosa
Streak color weiß
Solubility +++ Säuren
Crystal System monoklin,

Chemism

Chem­ical formula

Ca4MgH2(AsO4)4·4H2O

Chem­ical com­po­si­tion

Arsen, Calcium, Magnesium, Sauerstoff, Wasserstoff

Unit weight: 814.373138 u; Number of atoms in the formula: 39

Info

Empirical formula:

Ca4MgH2(AsO4)4·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.24

10

25.64

1.0079470

10.0794700
Oxygen

O

39.29

20

51.28

15.9994300

319.9886000
Magnesium

Mg

2.98

1

2.56

24.3050600

24.3050600
Calcium

Ca

19.69

4

10.26

40.0784000

160.3136000
Arsenic

As

36.80

4

10.26

74.9216020

299.6864080

Anal­y­sis wt%

As2O5 : 55.50, CaO : 28.20, MgO : 4.40, H2O : 11.50 (Ref: Bulletin de Mineralogie 72)

Strunz 9th edi­tion incl. updates

8.CB.10

8: Phosphate, Arsenate, Vanadate
C: Phosphate ohne weitere Anionen, mit H2O
B: Mit ausschließlich mittelgroßen [Kationen], RO4:H2O = 1:1
10:Huréaulith-Gruppe

Lapis Clas­sifica­tion

VII/C.24-030

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
C: Wasserhaltige Phosphate, ohne fremde Anionen
24: Mittelgroße und große Kationen: Fe-Mn-Zn-Mg und Ca-(NH4) 1+

Clas­sifica­tion by Hölzel

8.CD.550

8: PHOSPHATES ARSENATES VANADATES
C: Phosphates (-Anions +Water)
D: Phosphates, Valency: 1,2 for large, 2 for medsized Cations
5: very large: 1+2 Picropharmakolite-Group

Dana 8th edi­tion

39.02.05.01

39: Hydrated Acid Phosphates, etc
02: Hydrated Acid Phosphates, etc H2 (AB)5 (XO4)4 · x(H2O)

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

farblos, weiß, blass rose, rosa

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent bis durchscheinend

max. Birefrin­gence

0.008
Birefringence chart\! Irhtemite title=Birefringence chart Irhtemite

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

1.634

RI value β

1.642

RI value γ / ε

1.642

Ri mean

1.639

2V angle

Biaxial (-) 25°

Crystallography

Crystal Sys­tem

monoklin

Cell param­e­ters a (Å)

16.736

Cell param­e­ters b (Å)

9.483

Cell param­e­ters c (Å)

10.840

Cell param­e­ters a/b or c/a

1.765

Cell param­e­ters c/b

1.143

Cell param­e­ters α

90°

Cell param­e­ters β

97.25

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

1706.635

X-Ray Pow­der Diffrac­tion

9.42(30),
6.85(30),
5.35(30),
5.08(40),
3.68(40),
3.24(90),
2.97(100),
2.82(90)
XRD chart Irhtemite

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

Physical Properties

Density (g/cm³)

3.09

3.169 ( ρ calc. Mineralienatlas )

Insta­bil­ity

+++ Säuren

(Co-)Type locality

(Co-)Type locality

Marokko/Drâa-Tafilalet, Region/Ouarzazate, Provinz/Amerzgane, Cercle/Ouisselsate, Caïdat/Bou Azzer Mine

Marokko/Drâa-Tafilalet, Region/Zagora, Provinz/Agdz, Cercle/Ightem (Irhtem)

Preface

Author (Name, Year)

Pierrot & Schubnel, 1972

References

Bulletin de la Société Française Minéralogie et de Cristallographie 95 (1972), 365

Other languages

German

Irhtemit

Spanish

Irhtemita

French

Irhtemite

English

Irhtemite

Russian

Иртемит

CNMNC (IMA)-Number

IMA 1971-034

CNMNC symbol

Symbol

Irh

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

German pages

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

English pages

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

Russian pages

 Webmineral.ru - search for: Иртемит

Mineral Dealer

German pages

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

Locations with GPS information