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Hilgardite Group

A group of related mineral species

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Photos of Hilgardite Group (39)Discuss Hilgardite Group

Hilgardite Group Gallery Search Photos of Hilgardite Group

Edit Hilgardite Group Add Synonym Edit CIF structures Clear Cache

Hilgardite, etc.

Boulby Mine, Loftus, Redcar and Cleveland, North Yorkshire, England, UK

Hilgardite, etc.

Boulby Mine, Loftus, Redcar and Cleveland, North Yorkshire, England, UK

Hilgardite

Boulby Mine, Loftus, Redcar and Cleveland, North Yorkshire, England, UK

Hilgardite, etc.

Boulby Mine, Loftus, Redcar and Cleveland, North Yorkshire, England, UK

Hilgardite, etc.

Boulby Mine, Loftus, Redcar and Cleveland, North Yorkshire, England, UK

Hilgardite

Boulby Mine, Loftus, Redcar and Cleveland, North Yorkshire, England, UK

Hilgardite, etc.

Boulby Mine, Loftus, Redcar and Cleveland, North Yorkshire, England, UK

Hilgardite, etc.

Boulby Mine, Loftus, Redcar and Cleveland, North Yorkshire, England, UK

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About Hilgardite GroupHide

This page provides mineralogical data about Hilgardite Group.

Unique IdentifiersHide

Mindat ID:

39748

Long-form identifier:

mindat:1:1:39748:9

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	Year	Locality	Temp (K)
0019064	Leucostaurite	Brugger J, Meisser N, Ansermat S, Krivovichev S V, Kahlenberg V, Belton D, Ryan C G (2012) Leucostaurite, Pb2[B5O9]Cl0.5H2O, from the Atacama Desert: The first Pb-dominant member of the hilgardite group, and micro-determination of boron minerals by PIGE* American Mineralogist 97 1206-1212	2012	Mina Asuncion, Atacama Desert, Chile	293
0010290	Hilgardite	Burns P C, Hawthorne F C (1994) Refinement of the structure of hilgardite-1A Acta Crystallographica C50 653-655	1994	Penobsquis potash deposit, Sussex, New Brunswick	293
0000901	Hilgardite	Wan C, Ghose S (1983) Parahilgardite, Ca6[B5O9]3Cl33H2O: a triclinic piezoelectric zeolite-type pentaborate* American Mineralogist 68 604-613	1983	Iberville Parish, Louisiana, USA	293
0000696	Hilgardite	Ghose S, Wan C (1979) Hilgardite, Ca2[B5O9]ClH2O: a piezoelectric zeolite-type pentaborate* American Mineralogist 64 187-195	1979	Choctow Salt Dome, Iberville Parish, Louisiana, USA	293
0015604	Hilgardite	Rumanova I M, Iorysh Z I, Belov N V (1977) Crystal structure of triclinic chilgardite Ca2[B5O9]ClH2O = Ca2[B3+-B2deltaO9]ClH2O Soviet Physics Doklady 22 460-462	1977	not given	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Leucostaurite'
loop_
_publ_author_name
'Brugger J'
'Meisser N'
'Ansermat S'
'Krivovichev S V'
'Kahlenberg V'
'Belton D'
'Ryan C G'
_journal_name_full 'American Mineralogist'
_journal_volume 97 
_journal_year 2012
_journal_page_first 1206
_journal_page_last 1212
_publ_section_title
;
 Leucostaurite, Pb2[B5O9]Cl*0.5H2O, from the Atacama Desert: The first Pb-dominant
 member of the hilgardite group, and micro-determination of boron minerals by PIGE
;
_database_code_amcsd 0019064
_chemical_compound_source 'Mina Asuncion, Atacama Desert, Chile'
_chemical_formula_sum 'Pb4 Cl2 B10 O19 H2'
_cell_length_a 11.376
_cell_length_b 11.505
_cell_length_c 6.5568
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 858.160
_exptl_crystal_density_diffrn      5.084
_symmetry_space_group_name_H-M 'P n n 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,1/2+y,1/2+z'
  '-x,-y,z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Pb1   0.03790   0.76058   0.34570   0.01890
Pb2   0.72760   0.97810   0.51670   0.02570
Cl1   0.50000   0.00000   0.78000   0.03600
Cl2   0.00000   0.00000   0.47400   0.03200
B1   0.82000   0.73500   0.64100   0.01300
B2   0.74100   0.53100   0.51700   0.01000
B3   0.98800   0.75300   0.86900   0.01000
B4   0.71200   0.32100   0.50300   0.01200
B5   0.71000   0.71300   0.31500   0.01500
O1   0.94400   0.72800   0.69100   0.02200
O2   0.76100   0.62500   0.69000   0.02200
O3   0.81100   0.76600   0.43200   0.01000
O4   0.71400   0.58300   0.34300   0.02300
O5   0.91900   0.79300   0.01900   0.02000
O6   0.76400   0.82200   0.77700   0.01400
O7   0.77600   0.22900   0.59700   0.01500
O8   0.60800   0.76000   0.41900   0.01700
O9   0.74000   0.43400   0.59700   0.02200
Wat10   0.00000   0.50000   0.81800   0.07000
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
Pb1 0.02060 0.02400 0.01210 0.00040 -0.00030 0.00020
Pb2 0.03340 0.02620 0.01740 0.00340 0.00140 0.00290
Cl1 0.02300 0.03500 0.05000 0.00400 0.00000 0.00000
Cl2 0.03000 0.02100 0.04500 -0.00600 0.00000 0.00000

Relationship of Hilgardite Group to other SpeciesHide

Hilgardite Group Members:

Hilgardite	Ca₂B₅O₉Cl · H₂O	Tric. 1 : P1
Kurgantaite	CaSr[B₅O₉]Cl · H₂O	Tric. 1 : P1
Leucostaurite	Pb₂[B₅O₉]Cl · 0.5H₂O	Orth. mm2 : Pnn2
Tyretskite	Ca₂B₅O₉OH · H₂O	Tric. 1 : P1

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 Hilgardite GroupHide

mindat.org URL:

https://www.mindat.org/min-39748.html
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References for Hilgardite GroupHide

Reference List:

Kondrat'eva, V.V. (1964) X-ray diffraction studies of some minerals of the hilgardite group. Rentgenografia Mineral'nogo Syr'ia, Moscow: 4: 10-18.

Ghose, Subrata (1985) A new nomenclature for the borate minerals in the hilgardite (Ca2B5O9Cl·H2O)-tyretskite (Ca2B5O9OH·H2O) group. American Mineralogist, 70 (5-6) 636-637

Localities for Hilgardite GroupHide

Showing 42 localities.

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.

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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.


Canada
New Brunswick Kings Co. Cardwell Parish ⓘ Penobsquis	[Kurgantaite] Grice et al. (2005)
ⓘ Potash Corporation of Saskatchewan Mine (PCS Mine; Potash Corporation of America Mine)	[Hilgardite, Hilgardite-4M, Kurgantaite] Grice et al. (1996) +1 other reference
Hammond Parish ⓘ Salt Springs evaporite deposit	[Hilgardite] Anderle et al. (1979)
ⓘ Clover Hill deposit (Denison-Potacan mine; Potacan mine; Cassidy Potash mine)	[Hilgardite] Roulston et al. (1981) +1 other reference
Studholm Parish ⓘ Millstream deposit (Millstream property)	[Hilgardite] Grice et al. (2005)

Chile
Antofagasta Antofagasta Province Sierra Gorda Caracoles mining district Caracoles ⓘ Asunción Mine	[Leucostaurite] Brugger et al. (2012)
Quebrada Honda ⓘ San Rafael Mine	[Leucostaurite] Brugger et al. (2012)
Tocopilla Province María Elena ⓘ Santa Ana Mine (Chapacase Mine)	[Leucostaurite] SEM-EDS and Raman Spectroscopy by Joy ...

China
Tibet Ngari Gê'gyai Co. (Geji Co.) ⓘ Chagcam Caka (Zhacang Chaka)	[Kurgantaite] Anthony
Yunnan Pu'er Jiangcheng County ⓘ Mengyejing Mine	[Hilgardite-3Tc] Li et al. (2015)

Germany
Lower Saxony Göttingen District Bovenden Reyershausen ⓘ Königshall-Hindenburg mine	[Hilgardite, Hilgardite var: Strontiohilgardite-1Tc] Clark (1993)

Israel
Southern District Beersheba Subdistrict Tamar Regional Council ⓘ Mount Sodom	[Hilgardite] Anthony (2003)

Kazakhstan
Atyrau Region Inder District ⓘ Inder B deposit and salt dome	[Hilgardite, Tyretskite, Hilgardite var: Strontiohilgardite] Pekov et al. (1993) +2 other references
ⓘ Mt Kurgan-tau	[Kurgantaite] Pekov et al. (2001)
West Kazakhstan Region Terekti District Aksai Valley ⓘ Chelkar salt dome	[Hilgardite, Kurgantaite] Pekov (1998) +2 other references

Russia
Irkutsk Oblast ⓘ Irkutsk	[Kurgantaite] AmMin 87:1509-1512
Lena-Angara salt Basin ⓘ Angara River	[Tyretskite] Museum Victoria Registration Number: M ...
ⓘ Tyret' railway station	[Hilgardite, Tyretskite, Hilgardite var: Strontiohilgardite] Dimitri Belakovski
Lower Tunguska Nepa River basin ⓘ Nepskoe K salt deposit	[Hilgardite, Kurgantaite] Pekov et al. (2024)
Nizhneilimsky District Zheleznogorsk-Ilimsky ⓘ Korshunovskoye iron deposit	[Hilgardite, Hilgardite var: Strontiohilgardite] Mazurov et al. (2007)
Sakha Mirninsky District Mirny ⓘ Internatsionalny Mine	[Kurgantaite] Alrosa

Turkey
Eskişehir Province Seyitgazi District Kirka ⓘ Sarıkaya B deposit	[Hilgardite-4M] Koçak et al. (2016) +1 other reference

UK
England North Yorkshire Redcar and Cleveland Loftus ⓘ Boulby Mine	[Hilgardite, Hilgardite-3Tc] BMS Collection hilgardite-1TC +2 other references
Scarborough LCPs of Fylingdales and Hawsker-cum-Stainsacre ⓘ York Potash borehole SM4	[Hilgardite] Smith et al. (2014)
ⓘ Whitby	[Hilgardite, Hilgardite-3Tc] Smith et al. (2014)
ⓘ York Potash Project	[Hilgardite] Kemp et al. (2016)

USA
Alabama Clarke County ⓘ Salt swell	[Hilgardite] Rocks & Min.: 64:472. +1 other reference
Louisiana Iberville Parish Plaquemine ⓘ Choctaw Salt Dome	[Hilgardite, Hilgardite-3Tc, Hilgardite-4M] Hurlbut et al. (1937) +1 other reference

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