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Georgerobinsonite

A valid IMA mineral species

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Photos of Georgerobinsonite (13)

Georgerobinsonite Gallery Search Photos of Georgerobinsonite

Edit Add Synonym Edit CIF structures Clear Cache

Georgerobinsonite, etc.

Mammoth-Saint Anthony Mine, St. Anthony deposit, Tiger, Mammoth Mining District, Pinal County, Arizona, USA

Georgerobinsonite

Mammoth-Saint Anthony Mine, St. Anthony deposit, Tiger, Mammoth Mining District, Pinal County, Arizona, USA

Georgerobinsonite

Mammoth-Saint Anthony Mine, St. Anthony deposit, Tiger, Mammoth Mining District, Pinal County, Arizona, USA

Georgerobinsonite, etc.

Mammoth-Saint Anthony Mine, St. Anthony deposit, Tiger, Mammoth Mining District, Pinal County, Arizona, USA

Georgerobinsonite

Mammoth-Saint Anthony Mine, St. Anthony deposit, Tiger, Mammoth Mining District, Pinal County, Arizona, USA

Georgerobinsonite

Mammoth-Saint Anthony Mine, St. Anthony deposit, Tiger, Mammoth Mining District, Pinal County, Arizona, USA

Georgerobinsonite, etc.

Mammoth-Saint Anthony Mine, St. Anthony deposit, Tiger, Mammoth Mining District, Pinal County, Arizona, USA

Georgerobinsonite

Mammoth-Saint Anthony Mine, St. Anthony deposit, Tiger, Mammoth Mining District, Pinal County, Arizona, USA

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About GeorgerobinsoniteHide

Dr. George Robinson

Formula:

Pb₄(CrO₄)₂(OH)₂FCl

Colour:

Orange-red

Lustre:

Adamantine

Hardness:

2½ - 3

Specific Gravity:

6.23 (Calculated)

Crystal System:

Orthorhombic

Name:

Named in 2009 by Mark A. Cooper, Neil A. Ball, Frank C. Hawthorne, Werner H. Paar, Andrew C. Roberts, and Elizabeth Moffatt in honor of Dr. George Willard Robinson (February 7, 1946, Glens Falls, New York - ), professor of mineralogy at Michigan Technological University, curator of the A.E. Seaman Mineral Museum (1996-2013), and author.

Type Locality:

ⓘ Mammoth-Saint Anthony Mine, St. Anthony deposit, Tiger, Mammoth Mining District, Pinal County, Arizona, USA

This page provides mineralogical data about Georgerobinsonite.

Unique IdentifiersHide

Mindat ID:

39765

Long-form identifier:

mindat:1:1:39765:6

GUID
(UUID V4):

e37371ae-8d86-49ed-8ae8-a267eceac4dc

IMA Classification of GeorgerobinsoniteHide

IMA status:

Approved

Approval year:

2009

First published:

2011

Classification of GeorgerobinsoniteHide

Strunz-mindat (2024):

7.FB.05

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
F : Chromates
B : With additional O,V, S, Cl

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
Grb	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 GeorgerobinsoniteHide

Lustre:

Adamantine

Transparency:

Transparent

Colour:

Orange-red

Streak:

Pale orange

Hardness:

2½ - 3 on Mohs scale

Hardness Data:

Estimated

Tenacity:

Brittle

Cleavage:

None Observed

Parting:

None observed

Fracture:

Irregular/Uneven

Density:

6.23 g/cm³ (Calculated)

Comment:

Could not be measured due to small crystal size. The calculated value is based on the empirical formula.

Optical Data of GeorgerobinsoniteHide

Type:

Biaxial

Optical Extinction:

X = a, Y = c, Z = b.

Pleochroism:

Strong

Comments:

X = Y = orange, Z = yellow.

Comments:

Refractive indices: α ≈ 2.07; β > 2.11; γ > 2.11; for 590 nm.

Chemistry of GeorgerobinsoniteHide

Mindat Formula:

Pb₄(CrO₄)₂(OH)₂FCl

Elements listed:

Cl, Cr, F, H, O, Pb - search for minerals with similar chemistry

Crystallography of GeorgerobinsoniteHide

Crystal System:

Orthorhombic

Class (H-M):

mmm (2/m 2/m 2/m) - Dipyramidal

Space Group:

Pmmn

Cell Parameters:

a = 7.6257(6) Å, b = 11.6078(9) Å, c = 6.8961(5) Å

Ratio:

a:b:c = 0.657 : 1 : 0.594

Unit Cell V:

610.43 Å³ (Calculated from Unit Cell)

Morphology:

Tabular, with {001} dominant and minor {010} and {110}.

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)
0018387	Georgerobinsonite	Cooper M A, Ball N A, Hawthorne F C, Paar W H, Roberts A C, Moffatt E (2011) Georgerobinsonite, Pb4(CrO4)2(OH)2FCl, a new chromate mineral from the Mammoth-St. Anthony mine, Tiger, Pinal County, Arizona: description and crystal structure The Canadian Mineralogist 49 865-876		2011	Mammoth-St. Anthony mine, Tiger, Pinal County, Arizona, USA	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Georgerobinsonite'
loop_
_publ_author_name
'Cooper M A'
'Ball N A'
'Hawthorne F C'
'Paar W H'
'Roberts A C'
'Moffatt E'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 49 
_journal_year 2011
_journal_page_first 865
_journal_page_last 876
_publ_section_title
;
 Georgerobinsonite, Pb4(CrO4)2(OH)2FCl, a new chromate mineral from the
 Mammoth-St. Anthony mine, Tiger, Pinal County, Arizona: description and crystal structure
;
_database_code_amcsd 0018387
_chemical_compound_source 'Mammoth-St. Anthony mine, Tiger, Pinal County, Arizona, USA'
_chemical_formula_sum 'Pb4 Cr2 Cl F O10 H2'
_cell_length_a 7.6256
_cell_length_b 11.6081
_cell_length_c 6.8961
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 610.434
_exptl_crystal_density_diffrn      6.253
_symmetry_space_group_name_H-M 'P m m n'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,z'
  '-x,1/2+y,-z'
  '1/2-x,y,z'
  '1/2+x,-y,-z'
  '1/2+x,1/2+y,-z'
  '1/2-x,1/2-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
Pb(1)   0.25000   0.59690   0.12642   1.00000   0.02183
Pb(2)   0.50242   0.25000   0.41670   1.00000   0.02025
Cr   0.25000   0.49812   0.64850   1.00000   0.01290
Cl   0.25000   0.22840   0.07200   0.50000   0.02170
F   0.75000   0.25000   0.13270   1.00000   0.02700
O(1)   0.42260   0.51210   0.78040   1.00000   0.02640
O(2)   0.25000   0.60700   0.49310   1.00000   0.02320
O(3)   0.25000   0.37630   0.52890   1.00000   0.02350
O-h4   0.43880   0.75000   0.23060   1.00000   0.01660
H   0.55000   0.75000   0.15900   1.00000   0.02000
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Pb(1) 0.02560 0.02330 0.01660 0.00000 0.00000 -0.00310
Pb(2) 0.01470 0.02390 0.02210 0.00000 -0.00089 0.00000
Cr 0.01340 0.01350 0.01170 0.00000 0.00000 -0.00150
F 0.03500 0.03400 0.01100 0.00000 0.00000 0.00000
O(1) 0.02300 0.03300 0.02300 0.00600 -0.00300 -0.00600
O(2) 0.02800 0.02100 0.02100 0.00000 0.00000 0.00000
O(3) 0.02300 0.01600 0.03200 0.00000 0.00000 -0.00300
O-h4 0.01400 0.01900 0.01600 0.00000 -0.00100 0.00000

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
6.371 Å	(60)
3.357 Å	(60)
3.308 Å	(80)
3.195 Å	(80)
3.143 Å	(60)
2.131 Å	(100)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 7: Great Oxidation Event	<2.4
47a : [Near-surface hydration of prior minerals]
47e : [Vanadates, chromates, manganates]
47g : [Halogen-bearing surface weathering minerals]

Type Occurrence of GeorgerobinsoniteHide

Type Locality:

ⓘ Mammoth-Saint Anthony Mine, St. Anthony deposit, Tiger, Mammoth Mining District, Pinal County, Arizona, USA

General Appearance of Type Material:

Minute intergrowths of thin tabular orange crystals less than 0.1 mm across.

Place of Conservation of Type Material:

Royal Ontario Museum, Toronto, Ontario, Canada (M54947).

Geological Setting of Type Material:

Fault-controlled veins with sulfides, oxidized to a significant depth.

Associated Minerals at Type Locality:

Caledonite	Cerussite	Diaboleite	Leadhillite	Matlockite
Murdochite	Pinalite	Wulfenite	Yedlinite

Synonyms of GeorgerobinsoniteHide

IMA2009-068

Common AssociatesHide

Associated Minerals Based on Photo Data:

5 photos of Georgerobinsonite associated with Quartz	SiO₂
4 photos of Georgerobinsonite associated with Bobmeyerite	Pb₄(Al₃Cu)(Si₄O₁₂)(S_0.5Si_0.5O₄)(OH)₇Cl(H₂O)₃
2 photos of Georgerobinsonite associated with Cerussite	PbCO₃
2 photos of Georgerobinsonite associated with Diaboleite	Pb₂CuCl₂(OH)₄
1 photo of Georgerobinsonite associated with Leadhillite	Pb₄(CO₃)₂(SO₄)(OH)₂

Related Minerals - Strunz-mindat Grouping Hide

7.FB.05	Phoenicochroite	Pb₂(CrO₄)O	Mon. 2/m : B2/m
7.FB.10	Santanaite	Pb₁₁(CrO₄)O₁₂	Hex. 6 2 2 : P6₃ 2 2
7.FB.15	Wattersite	[Hg₂]²⁺₂Hg²⁺[CrO₄]O₂	Mon. 2/m : B2/b
7.FB.20	Deanesmithite	[Hg₂]²⁺Hg²⁺₃[CrO₄]S₂O	Tric. 1 : P1
7.FB.25	Edoylerite	Hg²⁺₃(CrO₄)S₂	Mon. 2/m : P2₁/b
7.FB.30	Reynoldsite	Pb₂Mn⁴⁺₂O₅(CrO₄)	Tric. 1 : P1

Fluorescence of GeorgerobinsoniteHide

In UV light:

Not fluorescent.

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 GeorgerobinsoniteHide

mindat.org URL:

https://www.mindat.org/min-39765.html
Please feel free to link to this page.

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External Links:

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Look for Georgerobinsonite on Mineralien Atlas

Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for GeorgerobinsoniteHide

Reference List:

IMA approvals - November 2009

Cooper, M. A., Ball, N. A., Hawthorne, F. C., Paar, W. H., Roberts, A. C., Moffatt, E. (2011) Georgerobinsonite, Pb₄(CrO₄)₂(OH)₂FCl, a new chromate mineral from the Mammoth - St. Anthony mine, Tiger, Pinal County, Arizona: Description and crystal structure. The Canadian Mineralogist, 49 (3) 865-876 doi:10.3749/canmin.49.3.865

(2023) Georgerobinsonite. Handbook of Mineralogy. Mineralogical Society of America

Localities for GeorgerobinsoniteHide

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.

USA (TL)

Arizona

Pinal County

Mammoth Mining District

Tiger

St. Anthony deposit

ⓘ Mammoth-Saint Anthony Mine (TL)

Cooper et al. (2011) +1 other reference

Georgerobinsonite

About GeorgerobinsoniteHide

Unique IdentifiersHide

IMA Classification of GeorgerobinsoniteHide

Classification of GeorgerobinsoniteHide

Mineral SymbolsHide

Physical Properties of GeorgerobinsoniteHide

Optical Data of GeorgerobinsoniteHide

Chemistry of GeorgerobinsoniteHide

Crystallography of GeorgerobinsoniteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of GeorgerobinsoniteHide

Synonyms of GeorgerobinsoniteHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Fluorescence of GeorgerobinsoniteHide

Other InformationHide

Internet Links for GeorgerobinsoniteHide

References for GeorgerobinsoniteHide

Localities for GeorgerobinsoniteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide