R4-an
TKW 280 grams. Fall not observed. Found 20 October 2017, Antofagasta, Chile, by the contributor.
As of today, the only meteorite in the MetBul with this classification.
  
Timur writes:
The world's first anomalous rumurutite! Before this meteorite, in Latin America they did not find a single R-chondrite. Before obtaining data on oxygen isotopy, the researchers believed that it was an anomalous CK carbonaceous chondrite. Meteorite is magnetic. The whole ore phase is not typical for rumuruti. Perhaps this meteorite will eventually become the founder of a new chondrite subgroup.
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