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Vicência
Basic information Name: Vicência
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes
Year fell: 2013
Country: Brazil
Mass:help 1540 g
Classification
  history:
Recommended:  LL3.2    [explanation]

This is 1 of 20 approved meteorites classified as LL3.2.   [show all]
Search for other: LL chondrites (type 3), LL chondrites, Ordinary chondrites (type 3), and Ordinary chondrites
Comments: Approved 30 Aug 2014
Writeuphelp
Writeup from MB 103:

Vicência        7°42.5’S, 35°25.66’W

Pernambuco, Brazil

Fell: 21 Sept 2013

Classification: Ordinary chondrite (LL3.2)

History: Fell, September 21, 2013, ~15:00 hours local time (18:00 UTC), village Borracha near Vicência, Pernambuco, Brazil. Landed <1 m from Mr. Adeildo Silva. Mr. Adeildo Silva claims that when he picked up the meteorite immediately after the fall, one side was warm, whereas the other was cold. Purchased by Maria E. Zucolotto and Andre Moutinho on September 30, 2013.

Physical characteristics: Single stone of 1.547 kg and ~13.7 × 12 × 8.5 cm. Pronounced chondritic texture, with abundant chondrules up to ~7 mm in diameter. Bulk density 3.13 g/cm3; grain density 3.28 g/cm3, porosity of 4.75%.

Petrography: Unshocked (S1), well-developed chondritic texture and mineralogy and mineral compositions of a highly unequilibrated ordinary chondrite. Major minerals olivine (Fa0.4-58.9), low-Ca pyroxene (Fs0.4-29.8). Mean Cr2O3 ferroan olivine 0.14±0.09 wt.%, n=115.

Geochemistry: R. Greenwood and I. Franchi, OU. Bulk oxygen isotopic composition is δ17O = 3.768 ± 0.042‰, δ18O = 5.359 ± 0.042‰, Δ17O = 0.981 ±0.020 ‰.

Classification: LL group based on chondrule mean apparent diameter (0.9 mm), bulk oxygen isotopic composition, content of metallic Fe,Ni (1.8 vol%), Co content of kamacite (1.73 wt%), ratios of metallic FeO/total iron (0.105) vs. total Fe/Mg (1.164), and of Ni/Mg (0.057) vs. total Fe/Mg. Petrologic type 3.2 classification is based on chondritic texture, plot of the standard deviation (0.09) vs the mean Cr2O3 content (0.14 wt. %) of ferroan olivine, trapped 132Xe of ~32×10-10cm3STP/g consistent with petrologic type 3.2.

Data from:
  MB103
  Table 0
  Line 0:
State/Prov/County:Pernambuco
Origin or pseudonym:Village of Borracha
Date:21 Sept 2013
Latitude:7°42.5'S
Longitude:35°25.66'W
Mass (g):1540
Pieces:1
Class:LL3.2
Shock stage:S1
Weathering grade:W0
Fayalite (mol%):0-60
Ferrosilite (mol%):0-30
Wollastonite (mol%):0-40
Classifier:K. Keil, UH; M.E. Zucolotto, NMB; A.N. Krot, UH; and co-authors.
Type spec mass (g):100
Type spec location:Rio
Main mass:Andre Moutinho
Finder:Mr Adeildo Silva
Comments:Submitted by K. Keil and M. E. Zucolotto
Plots: O isotopes:  
Institutions
   and collections
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
Rio: Museu Nacional, Quinta da Boa Vista, Rio de Janeiro, CEP 20940-040, Brazil (institutional address; updated 26 Dec 2011)
UH: Hawai'i Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawai'i, 2525 Correa Road, Honolulu, HI 96822, United States (institutional address; updated 25 Oct 2011)
NMB: Natural History Museum Bern Bernastrasse 15 CH-3005 Bern Switzerland, Switzerland; Website (institutional address; updated 2 Mar 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, in preparation (2014)
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
ALESSANDRO TAKEDA   
André Moutinho   
Anna Morris   
John A. Shea   
Rodrigo Guerra   
Samuel Wanderley   
Suzanne De Paula   
Geography:

Brazil
Coordinates:
     Recommended::   (7° 42' 30"S, 35° 25' 40"W)

Statistics:
     This is 1 of 2 approved meteorites from Pernambuco, Brazil (plus 1 unapproved name)
     This is 1 of 70 approved meteorites from Brazil (plus 6 unapproved names) (plus 6 impact craters)
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