SVIBOR - Papers quoted in CC - project code: 1-09-016
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SVIBOR - Collecting Data on Projects in Croatia
Papers quoted in Current Contents on project 1-09-016
Quoted papers: 10
Other papers: 21
Total: 31
Title: Tuzlaite, NaCaB5O8(OH)2*3H2O, a new mineral with a
pentaborate sheet structure from the Tuzla salt mine, Bosnia and
Herzegovina
- Authors:
- Bermanec, Vladimir (96490)
- Armbruster, Thomas
- Tibljaš, Darko (106871)
- Šturman, Darko
- Kniewald, Goran (85574)
Journal: American Mineralogist
ISSN: 0003-004X
Volume: 79
Year: 1994
Pages: from 562 to 569
Number of references: 30
Language: engleski
Summary: Tuzlaite, NaCa(B5O8)(OH)2)*3H2O, is a monoclinic sheet
borate occuring in nearly monomineralic veinlets formed in the course
dolomitic marl diagenesis at the Tuzla salt mine (Bosnia and Hercegovina.
Tuzlaite possesses a new type of pentaborate sheet structure with fourfold-
and threefold-coordinated B. Borate triangles and tetrahedra form
ten-memberd rings. The sheets are connected by Na and Ca, which are
cordinated to additional H2O.
The new mineral is colorless to white. It is biaxial positive, optical
orientation is Y=b. Z:a=14. Tuzlaite has perfect cleavage parallel to
(001), H=2-3, Dmeas=2.21, Dcalc=2.23 gcm-3. The new mineral is named after
town Tuzla, where it was found.
Keywords: tuzlaite, crystal structure, X-ray data, chemical composition, optical data, Tuzla, pentaborate
Title: Centro-symmetric tilasite from Nežilovo, Macedonia: A
crystal structure refinement
- Authors:
- Bermanec, Vladimir (96490)
Journal: Neues Jahrbuch fuer Mineralogie
Volume: 7
Year: 1994
Pages: from 289 to 294
Number of references: 13
Language: engleski
Summary: The crystal structure of natural tilasite, CaMg(AsO4)F,
a=6.681(2) A, b=8.950(2) A, c=7.573(2) A and beta=121.14(2), Z=4 from
Nežilovo, Macedonia was refined from X-ray single cristal data in space
group C2/c to R=2.79%. The reasults clearly indicate that this tilasite
crystallizes in the centric space group C2/c and not in CC as assumed for
the sample from Bisbee, Arizona.
Keywords: Tilasite, X-ray structural refinement, Nežilovo, Macedonia
Title: Crystal chemistry of Pb- and REE-rich piemontite from
Nežilovo, Macedonia
- Authors:
- Bermanec, Vladimir (96490)
- Armbruster, Thomas
- Oberhaensli, Roland
- Zebec, Vladimir (64534)
Journal: Schweiz. mineral. petrogr. Mitt.
Volume: 74
Year: 1994
Pages: from 321 to 328
Number of references: 29
Language: engleski
Summary: An unusual REE- and Pb-rich epidote group mineral related
to piemontite was found at Nežilovo, Macedonia where a mica schist with red
mica, quartz, ardennite, gahnite, franklinite(?) and piemontite occurs in a
metamorphic complex. This mineral is an intermediate member between
piemontite, hypothetical CaPbAl2Mn(Si2O7)(SiO4)O(OH,F)-related to
hancockite and allanite.
Piemontite from Nežilovo is deep red, nearly black, with admantine luster
and greyish-pinkish streak. The unusual mineral is brittle, with uneven
fracture and without observed cleavage. The mineral is pleochoic:
X=yellow-brown, Y=brown-red and Z=purple-brown.
Keywords: piemontite, Pb, REE, electron microprobe analysis, crystal chemistry, structure refinement, X-ray single crystal data, Nežilovo, Macedonia
Title: Childrenite and crandalite from Stari Trg mine (Trepča),
Kosovo: new data
- Authors:
- Bermanec, Vladimir (96490)
- Šćavničar, Stjepan (46231)
- Zebec, Vladimir (64534)
Journal: Mineralogy and Petrology
Volume: 52
Year: 1995
Pages: from 197 to 208
Number of references: 26
Language: engleski
Summary: Childrenite and crandallite are described as two new
phosphate members in the paragenesis of the Stari Trg mine which comprises
vivianite, ludlamite and struvite. Crandallite crystals with very simple
rhombohedral habit grow on rhombohedral carbonate and childrenite crystals.
The crystal morphology of childrenite is very similar to that at described
from other localities. Following forms were measured: 100, 010, 110, 120,
121, 221, 342. The average chemical composition is
Childrenite91Eosphorite9. Pseudo-orthorombic unit cell dimensions were
calculated: a=10.390(4)A, b=13.390(4)A and c=6.920(2)A. Growth sectors and
sector twins of childrenite are described.
Title: Nchwaningite, Mn2SiO3(Oh)2*H2O, a new pyroxene-related
chain silicate from the N'chwaning mine, Kalahari manganese field, South
Africa
- Authors:
- Nyfeler, Daniel
- Armbruster, Thomas
- Dixon, Roger
- Bermanec, Vladimir (96490)
Journal: American Mineralogist
Number: 3-4
ISSN: 0003-004X
Volume: 80
Year: 1995
Pages: from 377 to 386
Number of references: 30
Language: engleski
Summary: Nchwaningite, Mn2SiO3(Oh)2*H2O, is an orthorombic chain
silicate (space group Pca2, Z=4, a=12.672(9), b=7.217(3), c=5.341(2) A),
occuring as aggregates shaped like pin cushions, together with calcite,
bultfonteinite and chlorite at N'chwaning mine, located in the Kalahari
manganese field, South Africa. The aggregats consist of light brown,
transparent needles. Nchwaningite is biaxially negative, the optical
orientation is X=b, Y=a and Z=c, has two perfect cleavages parallel to
(010) and (100), Dcalc=3.202 gcm-3. The nchwaningite structures consist of
double layers of laterally linked so-called truncated pyroxene-building
units formed by double chain of octahedra, topped with a Zweier single
chain of Si tetrahedra. Symmetry-equivalent units are linked laterally but
turned upside down. This yields a double-layer structure with H bridges
linking the layers. A striking feature of the structure is that one MnO6
corner is formed by a H2O molecule.
Keywords: nchwaningite, crystal structure, opical data, X-ray data, chemical composition, chain silicate, Kalahari
Title: The depositional environment of the evaporite mineral
series at Tuzla, Bosnia and Hercegovina
- Authors:
- Kniewald, Goran (85574)
- Bermanec, Vladimir (96490)
- Tibljaš, Darko (106871)
Number: ort
ISSN: 0373-434X
Volume: Rapp
Year: 1995
Pages: from 105 to 105
Number of references: 106
Language: engleski
Information: svibor@znanost.hr
