WorksheetsMineral Properties and Classification Topic 2: Mineralogy
Total questions: 10
Worksheet time: 9mins
_______: Extremely thin when individual, thread-like
________: Thin, needle-like
_________: Pencil-like
________: Long and slender, like miniature columns
(a)
_____: Plate-like
_______: Book-like
______: Blade-like
(a)
A few minerals are strongly attracted to a magnet
_____________- Strongly magnetic
• Magnetite
• Pyrrhotite
____________- Weakly magnetic
• Olivines
• Pyroxenes
___________- Not magnetic
• Most minerals
(a)
Magnetite the has been naturally magnetized, probably as a result of inclusions/impurities
Associated with lightning strikes
Goldstone
Lodestone
Clodstone
Sandstone
Mineral Properties: _____
The taste of a mineral sample can be diagnostic but it is generally ___ recommended
Why might licking random minerals not be the best idea?
• Is it sanitary? Other people might licked it before you, it might be generally _____
• Is it harmful? Some minerals are _____, harmful, radioactive
• Is it worth it? Taste can be, but is not usually, diagnostic. Many taste worse than salt.
______ (NaCl) is salty, _______ (KCl) is bitter
(a)
Mineral Properties: ____
A ______ diagnostic property, which is only really useful for __-_____ samples
Some minerals have a sulphurous smell –
Sulfur, Pyrite, Sphalerite
Some have an earthy smell – hematite, limonite
(a)
Mineral Properties: ____
A diagnostic property based on a tactile response to a mineral surface
• _____: small, aggregate crystals or imperfections in surfaces
• ____ or ____: a temperature
dependent on ability to absorb heat
• ______/_____/____: Talc,
Serpentine, Graphite
• ______: Graphite
(a)
Mineral Properties: _____________
Minerals that contain ___________ elements, as part of the structure or as inclusions, can emit __________ levels of radiation.
The are measured with radiation meters.
Digital meters give readout values of ______ ___ ____ __ ____ (usually cps)
Other meters will produce _______ signals and _______ deflection of a needle/gauge
(a)
A property of some minerals discovered in 1880 by Pierre and Jacques Curie.
The basic concept: when a crystal is subject to stress, it may deform elastically, shifting ions (both positive and negative)
This creates surfaces that are slightly more positively and negatively charged, allowing a voltage to flow (if connected)
Pyroelectric
Piezoelectric
Peroelectric
A property named in 1824 by David Brewster but describe earlier.
The basic concept: when a crystal is subject to changes in temperature, it may become polarized
Piezoelectric
Pyroelectric
Peroelectric
