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Batubara
Batubara

Obsidian
Obsidian



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Obsidian

Properties of Batubara lan Obsidian

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Properties

fisik

atose

1-1.55-5.5
1 7
👆🏻

ukuran gandum

medium kanggo nggoleki coarse grained
-

rengat

conchoidal
conchoidal

tilas

ireng
putih

porosity

kurang keropos
banget kurang keropos

luster

kurang kanggo vitreous kanggo submetallic
vitreous

kekuatan compressive

-0.15 n / mm 2
0.15 450
👆🏻

cleavage

-
-

kateguhan

-
-

tartamtu gravitasi

1.1-1.42.6-2.7
0 8.4
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transparan

opaque
tembus

Kapadhetan

1100-1400 g / cm 32.6 g / cm 3
0 1400
👆🏻

situs termal

kapasitas panas tartamtu

1.32 kj / kg k0.92 kj / kg k
0.14 3.2
👆🏻

resistance

tahan panas
tahan panas, impact tahan