Jaszczak et al. 1 MICRO- AND NANO-SCALE GRAPHITE CONES AND TUBES FROM HACKMAN
Several unusual forms of natural graphite from an alkaline pegmatite that crosscuts rischorrite in the Hackman Valley, Khibiny Massif, Kola Peninsula, Russia are described. The graphite occurs macroscopically in two forms: as spherical aggregates up to 2 cm in diameter of friable, radially-aligned f...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.531.3761 2023-05-15T17:05:00+02:00 Jaszczak et al. 1 MICRO- AND NANO-SCALE GRAPHITE CONES AND TUBES FROM HACKMAN John A. Jaszczak Stephen A. Hackney George W. Robinson Paolo Bosio Yury Gogotsi The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.3761 http://www.phy.mtu.edu/~jaszczak/Kola/kola-graphite-ppt.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.3761 http://www.phy.mtu.edu/~jaszczak/Kola/kola-graphite-ppt.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.phy.mtu.edu/~jaszczak/Kola/kola-graphite-ppt.pdf text ftciteseerx 2016-01-08T10:37:21Z Several unusual forms of natural graphite from an alkaline pegmatite that crosscuts rischorrite in the Hackman Valley, Khibiny Massif, Kola Peninsula, Russia are described. The graphite occurs macroscopically in two forms: as spherical aggregates up to 2 cm in diameter of friable, radially-aligned fibers ~20 µm in cross section, and as fine-grained surface coatings in cavities covering aegirine, strontian fluorapatite and K-feldspar. Optical microscopy and field emission scanning electron microscopy (FESEM) show that the fibers are actually hollow channels whose walls are composed of tabular graphite crystals greatly elongated in the direction of the fiber axis and with their basal planes oriented parallel to the channel walls. Inside and among the channels occur rolled graphitic structures (RGS): scrolls, tubes, and cones, up to 2 µm in diameter and up to 15 µm in length. The fine-grained graphite coatings on the surfaces of cavities, on the other hand, consist almost solely of micro- and nano-scale RGS. The largest of the RGS are hollow scrolls, with the c-axis predominantly perpendicular to the scroll axis. These are usually cigar shaped but can also be more tubular. Conical RGS occur at the micro- and nano-scales. The nano-scale Text kola peninsula Unknown Khibiny ENVELOPE(33.210,33.210,67.679,67.679) Kola Peninsula |
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Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
description |
Several unusual forms of natural graphite from an alkaline pegmatite that crosscuts rischorrite in the Hackman Valley, Khibiny Massif, Kola Peninsula, Russia are described. The graphite occurs macroscopically in two forms: as spherical aggregates up to 2 cm in diameter of friable, radially-aligned fibers ~20 µm in cross section, and as fine-grained surface coatings in cavities covering aegirine, strontian fluorapatite and K-feldspar. Optical microscopy and field emission scanning electron microscopy (FESEM) show that the fibers are actually hollow channels whose walls are composed of tabular graphite crystals greatly elongated in the direction of the fiber axis and with their basal planes oriented parallel to the channel walls. Inside and among the channels occur rolled graphitic structures (RGS): scrolls, tubes, and cones, up to 2 µm in diameter and up to 15 µm in length. The fine-grained graphite coatings on the surfaces of cavities, on the other hand, consist almost solely of micro- and nano-scale RGS. The largest of the RGS are hollow scrolls, with the c-axis predominantly perpendicular to the scroll axis. These are usually cigar shaped but can also be more tubular. Conical RGS occur at the micro- and nano-scales. The nano-scale |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
John A. Jaszczak Stephen A. Hackney George W. Robinson Paolo Bosio Yury Gogotsi |
spellingShingle |
John A. Jaszczak Stephen A. Hackney George W. Robinson Paolo Bosio Yury Gogotsi Jaszczak et al. 1 MICRO- AND NANO-SCALE GRAPHITE CONES AND TUBES FROM HACKMAN |
author_facet |
John A. Jaszczak Stephen A. Hackney George W. Robinson Paolo Bosio Yury Gogotsi |
author_sort |
John A. Jaszczak |
title |
Jaszczak et al. 1 MICRO- AND NANO-SCALE GRAPHITE CONES AND TUBES FROM HACKMAN |
title_short |
Jaszczak et al. 1 MICRO- AND NANO-SCALE GRAPHITE CONES AND TUBES FROM HACKMAN |
title_full |
Jaszczak et al. 1 MICRO- AND NANO-SCALE GRAPHITE CONES AND TUBES FROM HACKMAN |
title_fullStr |
Jaszczak et al. 1 MICRO- AND NANO-SCALE GRAPHITE CONES AND TUBES FROM HACKMAN |
title_full_unstemmed |
Jaszczak et al. 1 MICRO- AND NANO-SCALE GRAPHITE CONES AND TUBES FROM HACKMAN |
title_sort |
jaszczak et al. 1 micro- and nano-scale graphite cones and tubes from hackman |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.3761 http://www.phy.mtu.edu/~jaszczak/Kola/kola-graphite-ppt.pdf |
long_lat |
ENVELOPE(33.210,33.210,67.679,67.679) |
geographic |
Khibiny Kola Peninsula |
geographic_facet |
Khibiny Kola Peninsula |
genre |
kola peninsula |
genre_facet |
kola peninsula |
op_source |
http://www.phy.mtu.edu/~jaszczak/Kola/kola-graphite-ppt.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.3761 http://www.phy.mtu.edu/~jaszczak/Kola/kola-graphite-ppt.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766059362864857088 |