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Atencioite (Atencioit)

Pictures (3 Images total)

Atencioit
Views (File:
1217199057
): 1491
Atencioit
Fundort: Linopolis, Divino das Laranjeiras, Minas Gerais, Brasilien; Bildbreite: 7 mm
Copyright: Leonardus; Contribution: Philip Blümner
Location: Brasilien/Südosten (Região Sudeste)/Minas Gerais/Doce-Tal/Galiléia/Laranjeiras/Linópolis (Linopolis)
Mineral: Atencioite
Image: 1217199057
Rating: 10 (votes: 1)
License: Usage for Mineralienatlas project only
Atencioit

Fundort: Linopolis, Divino das Laranjeiras, Minas Gerais, Brasilien; Bildbreite: 7 mm
Copyright: Leonardus
Contribution: Philip Blümner 2008-07-27
Locality: Linópolis (Linopolis) / Laranjeiras / Galiléia / Doce-Tal / Minas Gerais / Südosten (Região Sudeste) / Brasilien
Atencioit
Views (File:
1375638562
): 2316
Atencioit
Bildbreite: 1,3 mm; Fundort: Lavra do Poco d'Antas, Piauí-Tal, Itinga, Minas Gerais, Brasilien
Copyright: Christian Rewitzer; Contribution: Hg
Location: Brasilien/Südosten (Região Sudeste)/Minas Gerais/Itinga/Taquaral/Piaui-Tal/Lavra do Poco d'Antas
Mineral: Atencioite
Image: 1375638562
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Atencioit

Bildbreite: 1,3 mm; Fundort: Lavra do Poco d'Antas, Piauí-Tal, Itinga, Minas Gerais, Brasilien
Copyright: Christian Rewitzer
Contribution: Hg 2013-08-04
Locality: Lavra do Poco d'Antas / Piaui-Tal / Taquaral / Itinga / Minas Gerais / Südosten (Região Sudeste) / Brasilien
Atencioit xx
Views (File:
1527090490
): 498
Atencioit xx
Linopolis,Divino das Laranjeiras/Minas Gerais,Brasilien; Bildbreite ca. 2,5 cm
Copyright: Haubi; Contribution: Haubi
Collection: Haubi
Location: Brasilien/Südosten (Região Sudeste)/Minas Gerais/Doce-Tal/Galiléia/Laranjeiras/Linópolis (Linopolis)
Mineral: Atencioite
Image: 1527090490
License: Usage for Mineralienatlas project only
Atencioit xx

Linopolis,Divino das Laranjeiras/Minas Gerais,Brasilien; Bildbreite ca. 2,5 cm
Collection: Haubi
Copyright: Haubi
Contribution: Haubi 2018-05-23
Locality: Linópolis (Linopolis) / Laranjeiras / Galiléia / Doce-Tal / Minas Gerais / Südosten (Região Sudeste) / Brasilien

You find additional specimen at the Geolitho Museum

Collectors Summary

Color grünlichbraun bis hellbraun
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 4.5
Cleavages keine
Fracture rauh
Crystal System triklin, P1

Chemism

Chemical formula

Ca2Fe2+☐Mg2Fe2+2Be4(PO4)6(OH)4·6H2O

Additional chem. information

verwandt mit Roscherit

Chemical composition

Beryllium, Calcium, Eisen, Magnesium, Phosphor, Sauerstoff, Wasserstoff, Vakanz

Unit weight: 1078.30158841 u; Number of atoms in the formula: 68

Info

Empirical formula:

Ca2FeVcMg2Fe2Be4(PO4)6(OH)4·6H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Vacancy

Vc

0.00

1

1.47

0.0000000

0.0000000
Hydrogen

H

1.50

16

23.53

1.0079470

16.1271520
Beryllium

Be

3.34

4

5.88

9.0121823

36.0487292
Oxygen

O

50.45

34

50.00

15.9994300

543.9806200
Magnesium

Mg

4.51

2

2.94

24.3050600

48.6101200
Phosphorus

P

17.23

6

8.82

30.9737612

185.8425672
Calcium

Ca

7.43

2

2.94

40.0784000

80.1568000
Iron

Fe

15.54

3

4.41

55.8452000

167.5356000

Analysis wt%

P2O5 : 40.28, Al2O3 : 0.41, Fe2O3 : 3.92, FeO : 13.44, BeO : 9.30, MgO : 8.54, MnO : 1.30, CaO : 9.91, H2O : 13.20 (Ref: berechnet)

Strunz 9th edition incl. updates

8.DA.

8: Phosphate, Arsenate, Vanadate
D: Phosphate, mit weiteren Anionen, mit H2O
A: Mit kleinen (und gelegentlich größeren) [Kationen]

Lapis Classification

VII/D.01-045

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
D: Wasserhaltige Phosphate, mit fremden Anionen
1: Vorwiegend kleine Kationen: Be-Li

Classification by Hölzel

8.DA.270

8: PHOSPHATES ARSENATES VANADATES
D: Phosphates (+Anions +Water)
A: Phosphates, C small

Dana 8th edition

42.07.07.05

42: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
07: Hydrated Phosphates, etc., Containing Hydroxyl or Halogen where (AB)5 (XO4)3 Zq · x(H2O)
07: Roscherite group

IMA status

anerkannt 2004

Mineral status

anerkanntes Mineral

Optical Properties

Color

grünlichbraun bis hellbraun

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

Lustre

Glasglanz

max. Birefringence

0.013
Birefringence chart\! Atencioite title=Birefringence chart Atencioite

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

1.613

RI value β

1.620

RI value γ / ε

1.626

Ri mean

1.620

2V angle

Biaxial (-) 85°

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

6.668

Cell parameters b (Å)

9.879

Cell parameters c (Å)

9.883

Cell parameters a/b or c/a

0.675

Cell parameters c/b

1.000

Cell parameters α

73.53

Cell parameters β

85.60

Cell parameters γ

86.93

Z

1

Volume (ų)

622.127

X-Ray Powder Diffraction

9.47(41), 5.92(100), 3.31(34), 3.17(53), 2.784(86), 2.639(30), 2.225(26), 2.202(32)
XRD chart Atencioite

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)

4.5

VHN (Hardness Vickers)

280 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.84

2.878 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

rauh

Tenacity

spröde

Chemical Properties and Tests

in Salzsäure löslich, auch in starken Laugen

(Co-)Type locality

(Co-)Type locality

Type material

Mineralogische Sammlung der TU Bergakademie Freiberg

Collection number of type material

80905 / d 1,4

Preface

Name from

dem Professor für Mineralogie Daniel Atencio (geb. 1959), Universität Sao Paulo

Author (Name, Year)

Chukanov, N.V. et al., 2006

References

Chukanov, N.V. et al., New Data Minerals 41 (2006) S.18-25.

S. Weiß, Lapis Jhrg. 33, Nr. 3 (2008) S.42.

Other languages

German

Atencioit

English

Atencioite

Russian

Атенсиоит

CNMNC (IMA)-Number

IMA 2004-041

CNMNC symbol

Symbol

Aco

Locations with GPS information

IDs

GUSID (Global unique identifier short form) KbMKB57S-k23YU5S6DmYWg
GUID (Global unique identifier) 070AB329-D29E-4DFA-B761-4E52E839985A
Database ID 233