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- Aqueous HF Solution Calorimeter, Calorimetric system
composed of home made calorimeter and electrical circuits: purchased
electronic equipment and instrument controller. Home made portions
built in 1966 and modified through about 1985. Electronic components
vary in age with the average age about 12 years.
- Instrument capabilities:
- (1) as currently configured;
- (2) possible or planned:
-
- System can measure enthalpy of formation or enthalpy of reaction
of minerals in aqueous solvents like HF, HC1, water, and sodium
hydroxide. Update of the operating system is planned. The current
system is very difficult to use. Following planned update, the
system should be ready for use by others. Capacity is limited
by the available manpower (labor intensive) and the current operating
system. Capacity is limited by the nature of the reaction scheme
required. System usage currently is about 5 months every third
year. Located in Reston.
- Low-temperature Adiabatic Calorimeter, Calorimetric
system composed of home made calorimeter, adiabatic components,
and electrical circuits; purchased electronic equipment and instrument
controller. Home made portions built in 1967 and modified through
about 1998. Electronic components vary in age with the average
age about 10 years.
- Instrument capabilities:
- (1) as currently configured;
- (2) possible or planned:
-
- System can measure heat capacity of minerals between about
4.5 and 385 Kelvin. Update of the operating system is planned.
The current system is very difficult to use. Following planned
update, the system should be ready for use by others. Capacity
is limited by the available manpower and the current operating
system. Capacity is about 12 minerals per year under ideal conditions.
Current usage is about 3 minerals per year. Program of NIST has
taken about a quarter of the time for the past year. Traditional
use has come from the predecessor of the current Minerals Team.
Past OFA sources have been DOE, DARPA, OSW, and NASA. WRD has
used results from this instrument, but has not supplied manpower
to operate the equipment. Located in Reston.
- Differential Scanning Calorimeter, Perkin-Elmer model
dsc-2, purchased in 1973, upgraded in 1979. System can measure
heat capacity of milligram sized minerals from 100 to 1000 Kelvin
(K), however, the practical range is 298 to 1000 K. Update of
the operating system is planned. The current system is very difficult
to use. Following planned update, the system should be ready
for use by others. The system is old and temperamental. Capacity
is limited by the available manpower, the age of the equipment,
and the current operating system. The system capacity is about
4 samples per month. Located in Reston.
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