Elba manganese ores and their origin, South-eastern Desert, U.A.R.

1971 ◽  
Vol 38 (294) ◽  
pp. 235-244 ◽  
Author(s):  
E. Z. Basta ◽  
W. S. Saleeb
Keyword(s):  
Low Temperature ◽  
Surface Oxidation ◽  
Eastern Desert ◽  
Oxidation Zone ◽  
Manganese Ores ◽  
South Eastern ◽  
Narrow Belt ◽  
Ore Types ◽  
Mineralogical Evidence ◽  
Very Low Temperature

SummaryThe manganese ores of Elba, South-eastern Desert, occur as numerous veins located within a narrow belt trending N.W.-S.E. Three ore-types were distinguished: hard crystalline ore consisting mainly of pyrolusite or ramsdellite or both, banded colloform ore consisting mainly of psilomelane, and in places cryptomelane, and soft nodular ore consisting of todorokite with minor amounts of psilomelane (or cryptomelane), nsutite, and pyrolusite. Black calcite and baryte occur in some of the veins and increase with depth.Based on the field and mineralogical evidence the origin of the ore is discussed. It is suggested that the ore is a very low-temperature epithermal fissure deposit of black calcite type that occurs near the surface (oxidation zone) in brecciated zones along faults.

RESISTIVITY OF TmSe UNDER PRESSURE AT VERY LOW TEMPERATURE

1980 ◽  
Vol 41 (C5) ◽  
pp. C5-177-C5-180
Author(s):  
J. Flouquet ◽  
P. Haen ◽  
F. Holtzberg ◽  
F. Lapierre ◽  
J. M. Mignot ◽  
...  
Keyword(s):  
Low Temperature ◽  
Very Low Temperature

RECOVERY OF ZINC AND RARE EARTHS FROM ABU RUSHIED FERRUGINOUS ORE MATERIAL, SOUTH EASTERN DESERT, EGYPT

2007 ◽  
Vol 18 (Issue 1-A) ◽  
pp. 75-85
Author(s):  
N. EL-HAZEK ◽  
T. AMER ◽  
M. BADR ◽  
N. SHAWKY ◽  
D. ZAKY
Keyword(s):  
Rare Earths ◽  
Eastern Desert ◽  
South Eastern

ORDOVICIAN GLACIATION IN NE AFRICA: FIELD AND REMOTE SENSING-BASED EVIDENCES FROM THE SOUTH EASTERN DESERT OF EGYPT

2018 ◽  
Author(s):  
Mohamed Samy Elhebiry ◽  
◽  
Mohamed Sultan ◽  
Mohamed Sultan ◽  
A.E. Kehew ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Eastern Desert ◽  
The South ◽  
South Eastern ◽  
Ne Africa

Can fluorosyl hydride be formed or even prepared?

1990 ◽  
Vol 55 (4) ◽  
pp. 890-895
Author(s):  
Rudolf Zahradník ◽  
B. Andes Hess
Keyword(s):  
Low Temperature ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Solid Matrix ◽  
Vibrational Characteristics ◽  
Very Low Temperature

HFO and HClO (fluorosyl and chlorosyl hydrides) and isomeric molecules HOF and HOCl (hypofluorous and hypochlorous acids) have been studied theoretically. On the basis of nonempiracal quantum chemical calculations (MP2, MP4 and CCD/6-311G**) geometry, energy and vibrational characteristics are analyzed and it is concluded that there is a poor chance to observe formation of HFO. Possibly, bombardment of HF in a solid matrix by 16O could lead at very low temperature to HFO.

scholarly journals Silver‐Promoted High‐Performance (Ag,Cu)(In,Ga)Se 2 Thin‐Film Solar Cells Grown at Very Low Temperature

Solar RRL ◽  
2021 ◽  
pp. 2100108
Author(s):  
Shih-Chi Yang ◽  
Jordi Sastre ◽  
Maximilian Krause ◽  
Xiaoxiao Sun ◽  
Ramis Hertwig ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Low Temperature ◽  
High Performance ◽  
Thin Film Solar Cells ◽  
Very Low Temperature
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