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Pharmacoalumite (Alumopharmacosiderit)

Pictures (2 Images total)

Pharmakoalumit
Views (File:
1407941703
): 807
Pharmakoalumit
Bildbreite: 4 mm, Fundort: Emma Luisa Mine, Guanaco, Santa Catalina, Provinz Antofagasta, II. Region, Chile
Copyright: Leonardus; Contribution: thdun5
Location: Chile/Antofagasta, Region (II. Region)/Antofagasta, Provinz/Taltal, Comuna/Santa Catalina/El Guanaco Erzlagerstätte (Huanaco)/Emma Luisa Mine
Mineral: Pharmacoalumite
Image: 1407941703
License: Usage for Mineralienatlas project only
Pharmakoalumit

Bildbreite: 4 mm, Fundort: Emma Luisa Mine, Guanaco, Santa Catalina, Provinz Antofagasta, II. Region, Chile
Copyright: Leonardus
Contribution: thdun5 2014-08-13
Locality: Emma Luisa Mine / El Guanaco Erzlagerstätte (Huanaco) / Santa Catalina / Taltal, Comuna / Antofagasta, Provinz / Antofagasta, Region (II. Region) / Chile
Pharmakoalumit
Views (File:
1467206372
): 563
Pharmakoalumit
von der Chuquicamata Mine bei Calama, Antofagasta, Chile; weiße derbe Kruste auf Quarz mit blauem Coeruleit; BB = 6,0 mm
Copyright: Peter Köhlen; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A000497, Donator: Klaus Fleck
Location: Chile/Antofagasta, Region (II. Region)/El Loa, Provinz/Calama/Chuquicamata District/Chuquicamata Mine
Mineral: Pharmacoalumite
Image: 1467206372
License: Usage for Mineralienatlas project only
Pharmakoalumit (SNr: A000497)

von der Chuquicamata Mine bei Calama, Antofagasta, Chile; weiße derbe Kruste auf Quarz mit blauem Coeruleit; BB = 6,0 mm
Collection: Lithothek der Münchener Micromounter
Copyright: Peter Köhlen
Contribution: Münchener Micromounter 2016-06-29
Locality: Chuquicamata Mine / Chuquicamata District / Calama / El Loa, Provinz / Antofagasta, Region (II. Region) / Chile

You find additional specimen at the Geolitho Museum

Collectors Summary

Color weiß, blass gelb
Streak color weiß
Lustre Subglasglanz, Matt, Wachsglanz
Hardness (Mohs) 2.5
Solubility +++ heiße Säuren
Crystal System kubisch, P43m

Additional information / Summary

Ursprünglich im Jahre 1981 von Karl Schmetzer, Wolfgang Horn, und Hermann Bank, in Anspielung auf Aluminium in der Zusammensetzung und der Beziehung zu Pharmacosiderit, als Alumopharmacosiderit benannt.

Umbenannt von Rumsey et al zu Pharmacoalumit (2010).

Chemism

Chemical formula

KAl4(AsO4)3(OH)4·6.5H2O

Chemical composition

Aluminium, Arsen, Kalium, Sauerstoff, Wasserstoff

Unit weight: 748.9115428 u; Number of atoms in the formula: 47.5

Info

Empirical formula:

KAl4(AsO4)3(OH)4·6.5H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

2.29

17

35.79

1.0079470

17.1350990
Oxygen

O

48.07

22.5

47.37

15.9994300

359.9871750
Aluminium

Al

14.41

4

8.42

26.9815382

107.9261528
Potassium

K

5.22

1

2.11

39.0983100

39.0983100
Arsenic

As

30.01

3

6.32

74.9216020

224.7648060

Analysis wt%

Ø As2O5 : 44.30, Fe2O3 : 3.90, Al2O3 : 24.00, K2O : 7.50, H2O : 20.30 (Ref: Neues Jahrbuch für Mineralogie, (Monatshefte) 81)

Strunz 9th edition incl. updates

8.DK.10

8: Phosphate, Arsenate, Vanadate
D: Phosphate, mit weiteren Anionen, mit H2O
K: Mit großen und mittelgroßen [Kationen], (OH, etc.):RO4 > 1:1 und < 2:1
10:Pharmakosiderit-Gruppe

Lapis Classification

VII/D.47-010

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
D: Wasserhaltige Phosphate, mit fremden Anionen
47: Mittelgroße und sehr große Kationen: Al-Mg und Ca-Na-K

Classification by Hölzel

8.DI.210

8: PHOSPHATES ARSENATES VANADATES
D: Phosphates (+Anions +Water)
I: C large, V=1(2) - C small-medium, V=2,3,4
2: C small-medium, V=3 - XO4/OH<1 PharmacosideriteWardit-Group

Hey's Chemical Index of Minerals

20.04.03

20: Arsenates (also arsenates with phosphate, but without other anions)
04: Arsenates of Group III metals (Al, rare earths)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Pharmacosiderite supergroup  ⇒ Pharmacoalumite group

Optical Properties

Color

weiß, blass gelb

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

Lustre

Subglasglanz, Matt, Wachsglanz

RI value α / ω / n

1.565

Ri mean

1.565

2V angle

Isotropisch

Crystallography

Crystal System

kubisch

Class (H-M)

43m

Space Group number

215

Space Group

P43m

Cell parameters a (Å)

7.745

Cell parameters b (Å)

-

Cell parameters c (Å)

-

Cell parameters a/b or c/a

1

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

1

Volume (ų)

464.584

X-Ray Powder Diffraction

7.77(100),
4.48(50),
3.87(40),
3.16(50),
2.739(60),
2.452(30),
2.335(40),
2.237(20)
XRD chart Pharmacoalumite

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)

2.5

Density (g/cm³)

2.68 (berechnet)

2.677 ( ρ calc. Mineralienatlas )

Tenacity

spröde

Instability

+++ heiße Säuren

(Co-)Type locality

(Co-)Type locality

Chile/Antofagasta, Region (II. Region)/Antofagasta, Provinz/Taltal, Comuna/Santa Catalina/El Guanaco Erzlagerstätte (Huanaco)/Emma Luisa Mine

Preface

Author (Name, Year)

Schmetzer & Horn & Banj, 1981

References

Tschermaks Mineralogische und Petrographische Mitteilungen 1 (1948), 1-13

Neues Jahrbuch für Mineralogie, Monatshefte (1981), 97

IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) NEWSLETTER 2 - Mineralogical Magazine, February 2010, Vol. 74(1), pp. 375-377

IMA group assignments

 
Pharmacosiderite supergroup
 
 
 

 
 
Pharmacoalumite group
 
 
 

 
 
 
Bariopharmacoalumite
Ba0.5Al4[(AsO4)3(OH)4]·4H2O
kubisch
P43m

 
 
 
Calciopharmacoalumite
Ca0.5Al4(AsO4)3(OH)4·5H2O
kubisch
P43m

 
 
 
Hydroniumpharmacoalumite
(H3O)Al4(AsO4)3(OH)4·4.5H2O
kubisch
P43m

 
 
 
Natropharmacoalumite
NaAl4(AsO4)3(OH)4·4H2O
kubisch
P43m

 
 
 
Pharmacoalumite
KAl4(AsO4)3(OH)4·6.5H2O
kubisch
P43m

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Actuality: 09. May 2025 - 19:25:25

Other languages

French

Alumopharmacosiderite

English

Pharmacoalumite

IMA 10-A: Proposal to rename alumopharmacosiderite to pharmacoalumite and establish a formal group nomenclature system for mineral species structurally related to pharmacosiderite.

German

Pharmakoalumit

Alternative Name

Italian

Alumofarmacolita

German

Alumofarmacosiderit

Spanish

Alumofarmacosiderita

Italian

Alumofarmacosiderite

German

Alumopharmacolit

Spanish

Alumopharmacolita

Alumopharmacolite

German

Alumopharmacosiderit

Alumopharmacosiderita

English

Alumopharmacosiderite

German

Alumopharmakosiderit

German

Pharmacoalumit

als neuer Name vorgeschlagen: Mineralogical Magazine, February 2010, Vol. 74(1), pp. 375-377

CNMNC (IMA)-Number

IMA 1980-002

CNMNC symbol

Symbol

Pal

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 5_gDGEsfx0apcLEkxUvE7A
GUID (Global unique identifier) 1803F8E7-1F4B-46C7-A970-B124C54BC4EC
Database ID 93