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1-20 OF 60 RESULTS FOR
hilgardite
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Journal Article
Hilgardite polytype distribution in Sussex, New Brunswick evaporite deposits
Journal: Mineralogical Magazine
Published: 01 April 2014
Mineralogical Magazine (2014) 78 (2): 235–252.
...J. D. Grice; R. Rowe Abstract Hilgardite, Ca 2 B 5 O 9 Cl·H 2 O, has a zeolite-type framework structure consisting of cross-linked (010) layers of borate sheets having the fundamental building block (FBB) = 2Δ3□:<Δ2□>-<Δ2□>. These layers are polar and the orientation, plus the number...
Journal Article
Leucostaurite, Pb 2 [B 5 O 9 ]Cl·0.5H 2 O, from the Atacama Desert: The first Pb-dominant member of the hilgardite group, and micro-determination of boron in minerals by PIGE
Joël Brugger, Nicolas Meisser, Stefan Ansermet, Sergey V. Krivovichev, Volker Kahlenberg, David Belton, Chris G. Ryan
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 July 2012
American Mineralogist (2012) 97 (7): 1206–1212.
... of leucostaurite ( R 1 = 6.2%) contains a hilgardite-type three-dimensional [B 5 O 9 ] 3− framework. Leucostaurite is the first mineral of the hilgardite group with orthorhombic ( Pnn 2) symmetry. However, several borates synthesized for their non-linear optical properties are structurally and chemically closely...
Journal Article
Sr 2 B 5 O 9 OH·H 2 O, A SYNTHETIC BORATE RELATED TO HILGARDITE
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 February 2001
The Canadian Mineralogist (2001) 39 (1): 129–135.
... hydrothermale. La structure est étroitement reliée à celle des minéraux zéolitiques de type hilgardite, Ca 2 B 5 O 9 Cl·H 2 O, en particulier celle de l’hilgardite-1 A , triclinique. Les principales différences structurales proviennent d’une conformation plus symétrique des chaînes pentaborates [B 5 O...
Journal Article
Mineralogy of hilgardite-4M from evaporites in New Brunswick
Alan L. Rachlin, Joseph A. Mandarino, Bernard L. Murowchick, Robert A. Ramik, Pete J. Dunn, Malcolm E. Back
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 December 1986
The Canadian Mineralogist (1986) 24 (4): 689–693.
Journal Article
A new nomenclature for the borate minerals in the hilgardite (Ca 2 B 5 O 9 Cl · H 2 O)–tyretskite (Ca 2 B 5 O 9 OH · H 2 O) group
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 June 1985
American Mineralogist (1985) 70 (5-6): 636–637.
...Subrata Ghose Abstract The crystal structures of various monoclinic and triclinic mineral phases belonging to the hilgardite, Ca 2 B 5 O 9 Cl · H 2 O–tyretskite, Ca 2 B 5 O 9 OH · H 2 O group are based on the linkage in chains or layers of pentaborate polyanions, [B 5 O 12 ] 9− , which can exist...
Journal Article
Stereoisomerism of the pentaborate polyanion [B 5 O 12 ] 9− , polymorphism and piezoelectricity in the hilgardite group of minerals: a novel class of polar borate zeolites
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 December 1982
American Mineralogist (1982) 67 (11-12): 1265–1272.
...Subrata Ghose Abstract The minerals of the hilgardite group with the chemical composition Ca 2 [B 5 O 9 ]·H 2 O occur in a number of triclinic and monoclinic phases. In addition, an orthorhombic anhydrous phase has been synthesized. The building block of all of these structures is the pentaborate...
Journal Article
Proton magnetic resonance study of the water molecule in hilgardite, Ca 2 [B 5 O 9 ]Cl · H 2 O
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 April 1980
American Mineralogist (1980) 65 (3-4): 346–348.
...M. J. Peltre; B. Berglund; D. G. Carson; R. W. Vaughan Abstract A proton magnetic resonance study, at room temperature, of a single crystal of hilgardite, Ca 2 [B 5 O 9 ]Cl · H 2 O, has been carried out at 270 MHz. The variations of the dipolar splittings in the NMR spectra have been studied...
Journal Article
Hilgardite, Ca 2 [B 5 O 9 ]Cl.H 2 O; a piezoelectric zeolite-type pentaborate
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 February 1979
American Mineralogist (1979) 64 (1-2): 187–195.
...S. Ghose; C. Wan Abstract Hilgardite, Ca 2 B 5 O 9 Cl · H 2 0, from Choctow Salt Dome, Iberville Parish, Louisiana, is monoclinic, space group Aa, with unit-cell dimensions a = 11.438(2), b = 11.318(2), c = 6.318(1)A, β = 90.06(1)°, and Z = 4. The crystal structure has been determined from...
Journal Article
Notes on Minerals Associated with Hilgardite
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 December 1938
American Mineralogist (1938) 23 (12): 898–902.
...Cornelius S. Hurlbut, Jr.; Ralph E. Taylor Abstract A general discussion of the water-insoluble residues from the rock salt of Louisiana salt plugs has been given by Taylor (1937). A new mineral, hilgardite, described by Hurlbut and Taylor (1937), and an associated mineral, parahilgardite...
Journal Article
Hilgardite, a New Mineral Species, from Choctaw Salt Dome, Louisiana
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 October 1937
American Mineralogist (1937) 22 (10): 1052–1057.
...Cornelius S. Hurlbut, Jr.; Ralph E. Taylor Abstract In the insoluble residue from a brine well in the Choctaw Salt Dome, Louisiana, is found an unusual mineral assemblage. Hilgardite, a new species, is found there in association with anhydrite, danburite, boracite, and other minerals. Hilgardite...
Image
SEM images of hilgardite from the Penobsquis deposit: ( a ) cluster of hilg...
in Hilgardite polytype distribution in Sussex, New Brunswick evaporite deposits
> Mineralogical Magazine
Published: 01 April 2014
F ig . 3. SEM images of hilgardite from the Penobsquis deposit: ( a ) cluster of hilgardite-1 A (F97-29), ( b ) crystal group of hilgardite-3 A (F97-26) and ( c ) kurgantaite (F97-57).
Image
Comparison of calculated hilgardite-4 M XRPD pattern with hilgardite group...
in Hilgardite polytype distribution in Sussex, New Brunswick evaporite deposits
> Mineralogical Magazine
Published: 01 April 2014
F ig . 5. Comparison of calculated hilgardite-4 M XRPD pattern with hilgardite group minerals found in Sussex, New Brunswick.
Image
μXRPD identification of a hilgardite-3 A and -1 A mixture by profile fitt...
in Hilgardite polytype distribution in Sussex, New Brunswick evaporite deposits
> Mineralogical Magazine
Published: 01 April 2014
F ig . 6. μXRPD identification of a hilgardite-3 A and -1 A mixture by profile fitting of calculated XRPD patterns. Caption: 1 to 7 are diagnostic features that confirm a hilgardite-3 A and -1 A mixture.
Journal Article
BORATE MINERALS OF THE PENOBSQUIS AND MILLSTREAM DEPOSITS, SOUTHERN NEW BRUNSWICK, CANADA
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 October 2005
The Canadian Mineralogist (2005) 43 (5): 1469–1487.
... dans la séquence évaporitique. Les espèces minérales identifiées dans les carottes incluent: boracite, brianroulstonite, chambersite, colemanite, congolite, danburite, hilgardite, howlite, hydroboracite, kurgantaïte, penobsquisite, pringleïte, ruitenbergite, strontioginorite, szaibélyite...
Journal Article
Parahilgardite, A New Triclinic-Pedial Mineral
Journal: American Mineralogist
Publisher: Mineralogical Society of America
Published: 01 November 1938
American Mineralogist (1938) 23 (11): 765–771.
...Cornelius S. Hurlbut, Jr. Abstract The new species, parahilgardite, found in the Choctaw Salt Dome, Louisiana, is so named because of its close similarity with hilgardite. The specimens are invariably made up of one right-hand and one left-hand individual attached to the negative end of the a-axis...
Image
UNIT-CELL DATA OF HILGARDITE-RELATED COMPOUNDS
Published: 01 February 2001
TABLE 1. UNIT-CELL DATA OF HILGARDITE-RELATED COMPOUNDS
Image
Photograph of a bundle of walkerite fibers 6 mm in length, capped by hilgar...
in WALKERITE, A NEW BORATE MINERAL SPECIES IN AN EVAPORITIC SEQUENCE FROM SUSSEX, NEW BRUNSWICK, CANADA
> The Canadian Mineralogist
Published: 01 December 2002
Photograph of a bundle of walkerite fibers 6 mm in length, capped by hilgardite. Photograph by Q. Wight.
Image
μXRPD identification of a hilgardite-3 A and kurgantaite mixture by profil...
in Hilgardite polytype distribution in Sussex, New Brunswick evaporite deposits
> Mineralogical Magazine
Published: 01 April 2014
F ig . 7. μXRPD identification of a hilgardite-3 A and kurgantaite mixture by profile fitting of calculated XRPD patterns.
Image
μXRPD identification of a hilgardite-1 A and kurgantaite mixture by profil...
in Hilgardite polytype distribution in Sussex, New Brunswick evaporite deposits
> Mineralogical Magazine
Published: 01 April 2014
F ig . 8. μXRPD identification of a hilgardite-1 A and kurgantaite mixture by profile fitting of calculated XRPD patterns.
Image
Selected framework borate structures; ( a ) diomignite; ( b ) hilgardite-1 ...
Published: 01 August 2014
F ig . 10. Selected framework borate structures; ( a ) diomignite; ( b ) hilgardite-1 A ; ( c ) boracite; ( d ) pringleite. Legend as in Fig. 6 .
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