Sample No.:	RBT 04162; RBT 04299
Location:	Roberts Massif
Field No.:	16208; 15114
Dimensions (cm):	3.5x2.0x2.0; 5.5x2.0x2.0
Weight (g):	52.315; 55.198
Meteorite Type:	Iron-Ungrouped

Macroscopic Description: Tim McCoy, Linda Welzenbach
Both RBT 04299 and RBT 04162 exhibit a common external appearance. Surfaces are heavily oxidized, rough and flaking. Some fusion crust can be found on RBT 04162. One to three mm yellow halos surrounding pin holes occur all over the surface of RBT 04299. Cut faces show extremely fine scale structure.

Thin Section (,2) Description: Tim McCoy
The sections consist of ~70% Fe,Ni metal and ~30% troilite (FeS). The metal occurs as a dendritic texture within the troilite matrix. The structure is at an extremely fine scale, with dendrite arm spacings of ~50 microns. Rare, small (<20 µm ) chromites are present. The meteorites are ungrouped irons and share some similarities with other ungrouped, sulfide-rich iron meteorites, such as HOW 88403.

Thin Section Images

Reflected Light RBT 04162	Reflected Light RBT 04162	Reflected Light RBT 04162

Reflected Light RBT 04299	Reflected Light RBT 04299	Reflected Light RBT 04299	Reflected Light RBT 04299

Lab Images