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Atencioite

A valid IMA mineral species

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Photos of Atencioite (32)

Atencioite Gallery Search Photos of Atencioite

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Atencioite

Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil

Atencioite

Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil

Atencioite

Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil

Atencioite

Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil

Atencioite

Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil

Atencioite

Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil

Atencioite

Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil

Atencioite

Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil

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About AtencioiteHide

Dr. Daniel Atencio

Formula:

Ca₂Fe²⁺₃Mg₂Be₄(PO₄)₆(OH)₄ · 6H₂O

Colour:

greenish brown

Hardness:

4½

Specific Gravity:

2.86

Crystal System:

Triclinic

Member of:

Roscherite Group

Name:

In honor of Dr. Daniel Atencio (b. 12 May 1959, São Caetano do Sul, São Paulo, Brazil), professor of mineralogy at the Geoscience Institute of the University of São Paulo, Brazil.

Type Locality:

ⓘ Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil

Isostructural with:

Footemineite

Roscherite Group.

Unique IdentifiersHide

Mindat ID:

27433

Long-form identifier:

mindat:1:1:27433:7

GUID
(UUID V4):

ea6af675-49f5-4d75-8e22-71ddd34a4791

IMA Classification of AtencioiteHide

IMA status:

Approved

Approval year:

2004

First published:

2006

Type description reference:

Chukanov, N. V., Rastsvetaeva, R. K., Möckel, St., Zadov, A. E., Levitskaya, L. A. (2006) The roscherite group and its new representative member atencioite, Ca₂Fe²⁺□Mg₂Fe²⁺₂Be₄(PO₄)₆(OH)₄·6H₂O. New Data on Minerals, 41. 18-25

Classification of AtencioiteHide

Strunz-mindat (2024):

8.DA.10

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H₂O
A : With small (and occasionally larger) cations

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol	Source	Reference
Aco	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of AtencioiteHide

Colour:

greenish brown

Hardness:

4½ on Mohs scale

Tenacity:

Fragile

Cleavage:

None Observed

Fracture:

Irregular/Uneven

Density:

2.86(1) g/cm³ (Measured) 2.829 g/cm³ (Calculated)

Optical Data of AtencioiteHide

Type:

Biaxial (-)

RI values:

n_α = 1.613(2) n_β = 1.620(2) n_γ = 1.626(2)

2V:

Measured: 60° , Calculated: 85°

Max Birefringence:

δ = 0.013

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

Moderate

Pleochroism:

Visible

Comments:

brown, coloring dark, greenish-brown

Chemistry of AtencioiteHide

Mindat Formula:

Ca₂Fe²⁺₃Mg₂Be₄(PO₄)₆(OH)₄ · 6H₂O

Elements listed:

Be, Ca, Fe, H, Mg, O, P - search for minerals with similar chemistry

Crystallography of AtencioiteHide

Crystal System:

Triclinic

Class (H-M):

1 - Pinacoidal

Space Group:

Cell Parameters:

a = 6.668(1) Å, b = 9.879(1) Å, c = 9.883(1) Å
α = 73.53(1)°, β = 85.60(1)°, γ = 86.93(1)°

Ratio:

a:b:c = 0.675 : 1 : 1

Unit Cell V:

622.13 Å³ (Calculated from Unit Cell)

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0019973	Atencioite	Rastsvetaeva R K, Barinova A V, Chukanov N V, Pietraszko A (2004) Crystal structure of a magnesium-rich triclinic analogue of greifensteinite Doklady Chemistry 398 191-195		2004	Galileia, Minas Gerais, Brazil	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Atencioite'
loop_
_publ_author_name
'Rastsvetaeva R K'
'Barinova A V'
'Chukanov N V'
'Pietraszko A'
_journal_name_full 'Doklady Chemistry'
_journal_volume 398 
_journal_year 2004
_journal_page_first 191
_journal_page_last 195
_publ_section_title
;
 Crystal structure of a magnesium-rich triclinic analogue of greifensteinite
;
_database_code_amcsd 0019973
_chemical_compound_source 'Galileia, Minas Gerais, Brazil'
_chemical_formula_sum 'Ca2 Fe2.5 Mn.2 Al.1 Mg2.2 P6 Be4 O34 H16'
_cell_length_a 6.668
_cell_length_b 9.879
_cell_length_c 9.883
_cell_angle_alpha 73.53
_cell_angle_beta 85.60
_cell_angle_gamma 86.93
_cell_volume 622.127
_exptl_crystal_density_diffrn      2.853
_symmetry_space_group_name_H-M 'P -1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Ca   0.74570   0.26050   0.73820   1.00000   0.01494
Fe2+M1   0.00000   0.00000   0.00000   0.50000   0.01760
Mn2+M1   0.00000   0.00000   0.00000   0.20000   0.01760
AlM1   0.00000   0.00000   0.00000   0.10000   0.01760
MgM2   0.50000   0.00000   0.00000   0.20000   0.02026
MgM3   0.49250   0.99340   0.66360   0.55000   0.01393
Fe3+M3   0.49250   0.99340   0.66360   0.25000   0.01393
Fe2+M3   0.49250   0.99340   0.66360   0.20000   0.01393
Fe2+M4  -0.00210   0.66740   0.99040   0.55000   0.01684
MgM4  -0.00210   0.66740   0.99040   0.45000   0.01684
P1   0.24690   0.27030   0.72520   1.00000   0.01153
P2   0.48000   0.69620   0.93040   1.00000   0.01115
P3  -0.02450   0.93220   0.69730   1.00000   0.01001
Be1   0.69800   0.51300   0.15300   1.00000   0.01773
Be2   0.80800   0.84360   0.49400   1.00000   0.01013
O1   0.20120   0.96020   0.32640   1.00000   0.01140
O2   0.70000   0.32670   0.95910   1.00000   0.01393
O3   0.44870   0.61990   0.81730   1.00000   0.01520
O4   0.32590   0.36570   0.99370   1.00000   0.01520
O5   0.66710   0.58730   0.28100   1.00000   0.01773
O6   0.42140   0.16220   0.75390   1.00000   0.01520
O7   0.06970   0.23000   0.84090   1.00000   0.01646
O8   0.50590   0.85410   0.85960   1.00000   0.01267
O9   0.17370   0.00370   0.63090   1.00000   0.01393
O10   0.15730   0.28140   0.58480   1.00000   0.01646
O11   0.93830   0.81730   0.62630   1.00000   0.01520
O12  -0.00040   0.13570   0.14180   1.00000   0.01520
O-H1   0.56130   0.86300   0.53790   1.00000   0.01140
O-H2   0.93490   0.46360   0.13700   1.00000   0.01520
Wat3   0.72040   0.04080   0.95710   1.00000   0.02913
OW1   0.21890   0.48870   0.32680   1.00000   0.01900
OW2   0.27400   0.67140   0.51530   1.00000   0.02660
H1  -0.19400   0.57300  -0.41500   1.00000   0.03800
H2  -0.31500   0.54600  -0.27600   1.00000   0.03800
H3   0.79900   0.28900   0.45400   1.00000   0.03800
H4   0.76700   0.40000   0.51000   1.00000   0.03800

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
9.47 Å	(42)
5.92 Å	(100)
3.31 Å	(34)
3.17 Å	(53)
2.78 Å	(86)
2.202 Å	(32)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 4b: Highly evolved igneous rocks	>3.0
34 : Complex granite pegmatites

Type Occurrence of AtencioiteHide

Type Locality:

ⓘ Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil

General Appearance of Type Material:

subparallel aggregates of poorly formed crystals up to 3 mm long, greenish brown, and also spheroidal aggregates with a diameter up to 8 mm

Place of Conservation of Type Material:

Mineralogical Museum, Technische Universitat Bergakademie), Freiberg, Germany; inv. No. 80905

Associated Minerals at Type Locality:

Ushkovite	Quartz	Moraesite	Lepidolite	Beryllonite
Albite

Reference:

Chukanov, N.V., Rastsvetaeva, R.K., Möckel, St., Zadov, A.E., and Levitskaya, L.A. (2006) The roscherite group and its new representative member atencioite, Ca2Fe2+□Mg2Fe2+2Be4(PO4)6(OH)4•6H2O. New Data on Minerals, 41,18-25.

Download:

https://rruff.info/rruff_1.0/uploads/NDMMR41_18.pdf

Synonyms of AtencioiteHide

IMA2004-041

Other Language Names for AtencioiteHide

German:Atencioit

Relationship of Atencioite to other SpeciesHide

Member of:

Roscherite Group

Other Members of this group:

Footemineite	Ca₂Mn²⁺Mn²⁺₂Mn²⁺₂Be₄(PO₄)₆(OH)₄ · 6H₂O	Tric. 1 : P1
Greifensteinite	Ca₂Fe²⁺₅Be₄(PO₄)₆(OH)₄ · 6H₂O	Mon. 2/m : B2/b
Guimarãesite	Ca₂Be₄Zn₅(PO₄)₆(OH)₄ · 6H₂O	Mon. 2/m : B2/b
Okruschite	Ca₂Mn²⁺₅Be₄(AsO₄)₆(OH)₄ · 6H₂O	Mon. 2/m : B2/b
Roscherite	Ca₂Mn²⁺₅Be₄(PO₄)₆(OH)₄ · 6H₂O	Mon. 2/m : B2/m
Ruifrancoite	Ca₂(◻,Mn)₂(Fe³⁺,Mn,Mg)₄Be₄(PO₄)₆(OH)₄(OH,H₂O)₂ · 4H₂O	Mon. 2/m : B2/b
Zanazziite	Ca₂Mg₅Be₄(PO₄)₆(OH)₄ · 6H₂O	Mon. 2/m : B2/b

Common AssociatesHide

Associated Minerals Based on Photo Data:

15 photos of Atencioite associated with Ushkovite	MgFe³⁺₂(PO₄)₂(OH)₂ · 8H₂O
9 photos of Atencioite associated with Childrenite-Eosphorite Series
4 photos of Atencioite associated with Beryllonite	NaBePO₄
3 photos of Atencioite associated with Childrenite	Fe²⁺Al(PO₄)(OH)₂ · H₂O
2 photos of Atencioite associated with Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
2 photos of Atencioite associated with Hydroxylherderite	CaBe(PO₄)(OH)
1 photo of Atencioite associated with Moraesite	Be₂(PO₄)(OH) · 4H₂O
1 photo of Atencioite associated with Cleavelandite	Na(AlSi₃O₈)
1 photo of Atencioite associated with Brandãoite	BeAl₂(PO₄)₂(OH)₂(H₂O)₅
1 photo of Atencioite associated with Mica Group

Related Minerals - Strunz-mindat Grouping Hide

8.DA.05	Bearsite	Be₂(AsO₄)(OH) · 4H₂O	Mon.
8.DA.05	Moraesite	Be₂(PO₄)(OH) · 4H₂O	Mon. m : Bb
8.DA.10	Roscherite	Ca₂Mn²⁺₅Be₄(PO₄)₆(OH)₄ · 6H₂O	Mon. 2/m : B2/m
8.DA.10	Zanazziite	Ca₂Mg₅Be₄(PO₄)₆(OH)₄ · 6H₂O	Mon. 2/m : B2/b
8.DA.10	Greifensteinite	Ca₂Fe²⁺₅Be₄(PO₄)₆(OH)₄ · 6H₂O	Mon. 2/m : B2/b
8.DA.10	Ruifrancoite	Ca₂(◻,Mn)₂(Fe³⁺,Mn,Mg)₄Be₄(PO₄)₆(OH)₄(OH,H₂O)₂ · 4H₂O	Mon. 2/m : B2/b
8.DA.10	Guimarãesite	Ca₂Be₄Zn₅(PO₄)₆(OH)₄ · 6H₂O	Mon. 2/m : B2/b
8.DA.10	Footemineite	Ca₂Mn²⁺Mn²⁺₂Mn²⁺₂Be₄(PO₄)₆(OH)₄ · 6H₂O	Tric. 1 : P1
8.DA.10	Okruschite	Ca₂Mn²⁺₅Be₄(AsO₄)₆(OH)₄ · 6H₂O	Mon. 2/m : B2/b
8.DA.15	Uralolite	Ca₂Be₄(PO₄)₃(OH)₃ · 5H₂O	Mon. 2/m
8.DA.20	Weinebeneite	CaBe₃(PO₄)₂(OH)₂ · 4H₂O	Mon. m : Bb
8.DA.25	Tiptopite	K₂(Na,Ca)₂Li₃Be₆(PO₄)₆(OH)₂ · H₂O	Hex. 6 : P6₃
8.DA.40	Spencerite	Zn₄(PO₄)₂(OH)₂ · 3H₂O	Mon. 2/m : P2/b
8.DA.45	Glucine	CaBe₄(PO₄)₂(OH)₄ · 0.5H₂O

Other InformationHide

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for AtencioiteHide

mindat.org URL:

https://www.mindat.org/min-27433.html
Please feel free to link to this page.

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External Links:

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

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References for AtencioiteHide

Reference List:

Localities for AtencioiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality.

- Good crystals or important locality for species.

- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.


Brazil (TL)
Minas Gerais Divino das Laranjeiras ⓘ Linópolis (TL)	Chukanov et al. (2006) +1 other reference
ⓘ João Firmino claim	In Coll. M. Slama +2 other references
Itinga Jenipapo pegmatite field ⓘ Jorge pegmatite	Ricardo Scholz
Taquaral Piauí Valley ⓘ Poço d'Antas claim	Färber (n.d.)

Atencioite

About AtencioiteHide

Unique IdentifiersHide

IMA Classification of AtencioiteHide

Classification of AtencioiteHide

Mineral SymbolsHide

Physical Properties of AtencioiteHide

Optical Data of AtencioiteHide

Chemistry of AtencioiteHide

Crystallography of AtencioiteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of AtencioiteHide

Synonyms of AtencioiteHide

Other Language Names for AtencioiteHide

Relationship of Atencioite to other SpeciesHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for AtencioiteHide

References for AtencioiteHide

Localities for AtencioiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide